CVE-2025-11678

highpriority · track · 0EPSS 0.003 · 21 %ileDEEUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.29% (21st) EPSS
CVSS 7.6 · high
Is it mine?
10 products
Check your exposure
Who says so?
4 sources
cnnvd · enisa_euvd · cert_bund · redhat_csaf

EPSS · scored 2026-10-27

Stack-based Buffer Overflow in lws_adns_parse_label in warmcat libwebsockets allows, when the LWS_WITH_SYS_ASYNC_DNS flag is enabled during compilation, to overflow the label_stack, when the attacker is able to sniff a DNS request in order to craft a response with a matching id containing a label longer than the maximum.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedlibwebsockets-0:4.3.0-2.el9ost.src as a component of Red Hat OpenStack Platform 17.1redhat_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

    https://access.redhat.com/errata/RHSA-2025:22969
  • Fixedlibwebsockets-0:4.3.0-2.el9ost.x86_64 as a component of Red Hat OpenStack Platform 17.1redhat_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

    https://access.redhat.com/errata/RHSA-2025:22969
  • Fixedlibwebsockets-debuginfo-0:4.3.0-2.el9ost.x86_64 as a component of Red Hat OpenStack Platform 17.1redhat_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

    https://access.redhat.com/errata/RHSA-2025:22969
  • Fixedlibwebsockets-debugsource-0:4.3.0-2.el9ost.x86_64 as a component of Red Hat OpenStack Platform 17.1redhat_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

    https://access.redhat.com/errata/RHSA-2025:22969
  • Fixedlibwebsockets-devel-debuginfo-0:4.3.0-2.el9ost.x86_64 as a component of Red Hat OpenStack Platform 17.1redhat_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

    https://access.redhat.com/errata/RHSA-2025:22969
  • Workaroundlibwebsockets-0:4.3.0-2.el9ost.src as a component of Red Hat OpenStack Platform 17.1redhat_csaf

    Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

  • Workaroundlibwebsockets-0:4.3.0-2.el9ost.x86_64 as a component of Red Hat OpenStack Platform 17.1redhat_csaf

    Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

  • Workaroundlibwebsockets-debuginfo-0:4.3.0-2.el9ost.x86_64 as a component of Red Hat OpenStack Platform 17.1redhat_csaf

    Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

  • Workaroundlibwebsockets-debugsource-0:4.3.0-2.el9ost.x86_64 as a component of Red Hat OpenStack Platform 17.1redhat_csaf

    Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

  • Workaroundlibwebsockets-devel-debuginfo-0:4.3.0-2.el9ost.x86_64 as a component of Red Hat OpenStack Platform 17.1redhat_csaf

    Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

02

cvss

Technical severity, 0–10. One row per scoring source.

7.6
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.8–7.6

v3.17.6highCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Lsecondary · Red Hat Product Security US
v4.07.5highCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU
v4.07.5highCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · prodsec@nozominetworks.com
v4.04.8mediumCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-121USCWE-121US
05

affected products (10)

Products and version ranges known to be affected.

06

advisories (2)

Vendor and ecosystem advisories describing this.

  • RHSA-2025:22969Red Hat Security Advisory: Red Hat OpenStack Platform 17.1 (libwebsockets) security update2025-12-09csaf · redhat_csafUS

    An update for libwebsockets is now available for Red Hat OpenStack Platform 17.1 (Wallaby). 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.

  • WID-SEC-W-2025-2784Red Hat OpenStack Platform (Wallaby): Schwachstelle ermöglicht CodeausführungDeutsch2025-12-09csaf · cert_bundDE

    Ein Angreifer aus einem angrenzenden Netzwerk kann eine Schwachstelle in Red Hat OpenStack Platform (Wallaby) ausnutzen, um möglicherweise beliebigen Code auszuführen oder einen Denial-of-Service-Zustand zu verursachen.

07

also known as (3)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcert_bundredhat_csafNVDCVE.orgMITRE
published 2025-10-20modified 2026-06-17
09

references (6)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan