CVE-2021-38575

mediumpriority · track · 33EPSS 0.020 · 81 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.99% (81st) EPSS

CVSS 6.8 · medium

Is it mine?

43 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · redhat_csaf

EPSS · scored 2026-10-27

NetworkPkg/IScsiDxe has remotely exploitable buffer overflows.

remediations

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

A vendor fix is available.

Fixededk2-0:20200602gitca407c7246bf-4.el8_4.2.src as a component of Red Hat Enterprise Linux AppStream (v. 8)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
https://access.redhat.com/errata/RHSA-2021:3066
Fixededk2-aarch64-0:20200602gitca407c7246bf-4.el8_4.2.noarch as a component of Red Hat Enterprise Linux AppStream (v. 8)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
https://access.redhat.com/errata/RHSA-2021:3066
Fixededk2-ovmf-0:20200602gitca407c7246bf-4.el8_4.2.noarch as a component of Red Hat Enterprise Linux AppStream (v. 8)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
https://access.redhat.com/errata/RHSA-2021:3066
Fixededk2-0:20190308git89910a39dcfd-6.el8_1.1.src as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)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
https://access.redhat.com/errata/RHSA-2021:3172
Fixededk2-aarch64-0:20190308git89910a39dcfd-6.el8_1.1.noarch as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)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
https://access.redhat.com/errata/RHSA-2021:3172
Fixededk2-ovmf-0:20190308git89910a39dcfd-6.el8_1.1.noarch as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.1)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
https://access.redhat.com/errata/RHSA-2021:3172
Fixededk2-0:20190829git37eef91017ad-9.el8_2.1.src as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)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
https://access.redhat.com/errata/RHSA-2021:3369
Fixededk2-aarch64-0:20190829git37eef91017ad-9.el8_2.1.noarch as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)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
https://access.redhat.com/errata/RHSA-2021:3369
Fixededk2-ovmf-0:20190829git37eef91017ad-9.el8_2.1.noarch as a component of Red Hat Enterprise Linux AppStream EUS (v. 8.2)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
https://access.redhat.com/errata/RHSA-2021:3369

cvss

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

8.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–8.1

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.2 · impact 5.9

v3.18.1highAV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.18.1highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · Red Hat Product Security US

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USprimaryCWE-119USCWE-119USCWE-124US

affected products (43)

Products and version ranges known to be affected.

Tianocore EDK II≤ unspecified ≤edk2-stable202105enisa_euvdEU
Canonical Ltd. Ubuntu≤ 21.04fstec_bduRU
Canonical Ltd. Ubuntu≤ 20.04 LTSfstec_bduRU
Red Hat Inc. Red Hat Enterprise Linux≤ 8.2 Extended Update Supportfstec_bduRU
Red Hat Inc. Red Hat Enterprise Linux≤ 8fstec_bduRU
Red Hat Inc. Red Hat Enterprise Linux≤ 7fstec_bduRU
Red Hat Inc. Red Hat Enterprise Linux≤ 8.1 Extended Update Supportfstec_bduRU
Red Hat Inc. Red Hat Virtualization≤ 4 for RHEL 8fstec_bduRU
Tianocore edk2≤ edk2-stable202002fstec_bduRU
Tianocore edk2≤ edk2-stable201911fstec_bduRU
Tianocore edk2≤ edk2-stable201908fstec_bduRU
Tianocore edk2≤ edk2-stable201905fstec_bduRU
Tianocore edk2≤ edk2-stable201903fstec_bduRU
Tianocore edk2≤ edk2-stable201811fstec_bduRU
Tianocore edk2≤ edk2-stable201808fstec_bduRU
Tianocore edk2≤ edk2-stable202011fstec_bduRU
Tianocore edk2≤ edk2-stable202102fstec_bduRU
Tianocore edk2≤ edk2-stable202105fstec_bduRU
Tianocore edk2≤ UDK2017fstec_bduRU
Tianocore edk2≤ UDK2018fstec_bduRU

showing 20 of 43

advisories (3)

Vendor and ecosystem advisories describing this.

RHSA-2021:3066Red Hat Security Advisory: edk2 security update2021-08-10csaf · redhat_csafUS
An update for edk2 is now available for Red Hat Enterprise Linux 8. 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.
RHSA-2021:3172Red Hat Security Advisory: edk2 security update2021-08-17csaf · redhat_csafUS
An update for edk2 is now available for Red Hat Enterprise Linux 8.1 Extended Update Support. 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.
RHSA-2021:3369Red Hat Security Advisory: edk2 security update2021-08-31csaf · redhat_csafUS
An update for edk2 is now available for Red Hat Enterprise Linux 8.2 Extended Update Support. 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.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu redhat_csaf NVD CVE.org MITRE

published 2021-12-01modified 2026-06-17

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+21038 more

references (15)

External citations — patches, advisories, analysis.

scry

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