CVE-2019-18805

highPriorität · verfolgen · 40EPSS 0.035 · 89. PerzentilEURUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
3.47% (89th) EPSS
CVSS 7.5 · high
Is it mine?
54 products
Prüfe deine Angriffsfläche
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · bewertet 2026-10-23

An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before 5.0.11. There is a net/ipv4/tcp_input.c signed integer overflow in tcp_ack_update_rtt() when userspace writes a very large integer to /proc/sys/net/ipv4/tcp_min_rtt_wlen, leading to a denial of service or possibly unspecified other impact, aka CID-19fad20d15a6.

01

Behebungen

Hersteller-Fix, Mitigation oder Workaround, wie von den Quellen veröffentlicht.

Ein Hersteller-Fix ist verfügbar.

  • Behobenkernel-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-abi-whitelists-0:4.14.0-115.18.1.el7a.noarch as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-alt-0:4.14.0-115.18.1.el7a.src as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-bootwrapper-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-debug-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-debug-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-debug-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-debug-devel-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-debuginfo-common-ppc64le-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-debuginfo-common-ppc64le-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-devel-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-doc-0:4.14.0-115.18.1.el7a.noarch as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-tools-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-tools-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-tools-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-tools-libs-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenkernel-tools-libs-devel-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenperf-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenperf-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenperf-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenpython-perf-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenpython-perf-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Behobenpython-perf-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2020:0740
  • Workaroundkernel-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-abi-whitelists-0:4.14.0-115.18.1.el7a.noarch as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-alt-0:4.14.0-115.18.1.el7a.src as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-bootwrapper-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-debug-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-debug-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-debug-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-debug-devel-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-debuginfo-common-ppc64le-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-debuginfo-common-ppc64le-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-devel-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-doc-0:4.14.0-115.18.1.el7a.noarch as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-tools-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-tools-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-tools-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-tools-libs-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundkernel-tools-libs-devel-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundperf-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundperf-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundperf-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundpython-perf-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundpython-perf-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

  • Workaroundpython-perf-debuginfo-0:4.14.0-115.18.1.el7a.ppc64le as a component of Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)redhat_csaf

    This flaw can be mitigated by setting the sysctl parameter (/proc/sys/net/ipv4/tcp_min_rtt_wlen) with 300 which means the packet time will not exceed more then 5 minutes and which should not cause an integer overflow.

02

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

9.8
010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · high–critical · 7.3–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USAusnutzbarkeit 10 · Auswirkung 6.4
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USAusnutzbarkeit 3.9 · Auswirkung 5.9
v3.07.3highCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Hsecondary · Red Hat Product Security US
v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
03

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

04

betroffene Produkte (54)

Betroffene Produkte und Versionsbereiche.

20 von 54 angezeigt
05

Advisories (1)

Hersteller- und Ökosystem-Meldungen dazu.

  • RHSA-2020:0740Red Hat Security Advisory: kernel-alt security and bug fix update2020-03-09csaf · redhat_csafUS

    An update for kernel-alt is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

06

auch bekannt als (4)

Weitere Namen und Kennungen dieser Entität.

07

quellen

Welche Quellen diesen Datensatz belegen und wann.

veröffentlicht 2019-11-07geändert 2026-06-17
09

Referenzen (50)

Externe Belege — Patches, Meldungen, Analysen.

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