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Fencer Vulns
medium 4.4

CVE-2023-31356 json

Incomplete system memory cleanup in SEV firmware could allow a privileged attacker to corrupt guest private memory, potentially resulting i…

published 2024-08-13 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-35667

cvss
4.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits
0
none known

Summary

Incomplete system memory cleanup in SEV firmware could allow a privileged attacker to corrupt guest private memory, potentially resulting in a loss of data integrity.

Patch / fix

  • AMD AMD EPYC™ 7003 Processors MilanPI 1.0.0.C
  • AMD AMD EPYC™ 9004 Processors GenoaPI 1.0.0.B
  • AMD AMD EPYC™ Embedded 7003 "EmbMilanPI-SP3 1.0.0.8"
  • AMD AMD EPYC™ Embedded 9004 EmbGenoaPI-SP5 1.0.0.6
  • amd64-microcode Debian 12 3.20240820.1~deb12u1
  • amd64-microcode Debian 14, Debian 13 3.20240820.1

debian advisories DEBIAN-CVE-2023-31356

  • amd64-microcode Ubuntu 24.04 LTS 3.20250311.1ubuntu0.24.04.1

ubuntu advisories UBUNTU-CVE-2023-31356

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • linux-firmware RHEL 9 20240905-143.3.el9_4
  • iwl100-firmware RHEL 9 39.31.5.1-143.3.el9_4
  • iwl105-firmware RHEL 9 18.168.6.1-143.3.el9_4
  • iwl135-firmware RHEL 9 18.168.6.1-143.3.el9_4
  • iwl1000-firmware RHEL 9 1:39.31.5.1-143.3.el9_4
  • iwl2000-firmware RHEL 9 18.168.6.1-143.3.el9_4
  • iwl2030-firmware RHEL 9 18.168.6.1-143.3.el9_4
  • iwl3160-firmware RHEL 9 1:25.30.13.0-143.3.el9_4

red hat advisories RHSA-2024:7484RHSA-2024:7483RHSA-2024:7482RHSA-2024:7481RHSA-2024:7418

  • linux-firmware AlmaLinux 8 20240827-124.git3cff7109.el8_10
  • iwl100-firmware AlmaLinux 8 39.31.5.1-124.el8_10.1
  • iwl105-firmware AlmaLinux 8 18.168.6.1-124.el8_10.1
  • iwl135-firmware AlmaLinux 8 18.168.6.1-124.el8_10.1
  • iwl1000-firmware AlmaLinux 8 1:39.31.5.1-124.el8_10.1
  • iwl2000-firmware AlmaLinux 8 18.168.6.1-124.el8_10.1
  • iwl2030-firmware AlmaLinux 8 18.168.6.1-124.el8_10.1
  • iwl3160-firmware AlmaLinux 8 1:25.30.13.0-124.el8_10.1

almalinux advisories ALSA-2024:7481ALSA-2024:7484

  • linux-firmware Rocky Linux 8 20240827-124.git3cff7109.el8_10

rocky linux advisories RLSA-2024:7481

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-31356 updated cvss 4.4

kernel: hw:amd: Incomplete system memory cleanup in SEV firmware corrupt guest private memory

  • Red Hat Enterprise Linux BaseOS (v. 8) iwl100-firmware 39.31.5.1-124.el8_10.1, iwl5150-firmware 8.24.2.2-124.el8_10.1, iwl1000-firmware 39.31.5.1-124.el8_10.1, iwl105-firmware 18.168.6.1-124.el8_10.1, iwl135-firmware 18.168.6.1-124.el8_10.1, iwl3945-firmware 15.32.2.9-124.el8_10.1, +15 more
    fixed: vendor fix RHSA-2024:7481
  • Red Hat Enterprise Linux BaseOS (v. 9) linux-firmware 20240905-143.3.el9_4, iwl100-firmware 39.31.5.1-143.3.el9_4, iwl5150-firmware 8.24.2.2-143.3.el9_4, iwl1000-firmware 39.31.5.1-143.3.el9_4, iwl105-firmware 18.168.6.1-143.3.el9_4, iwl135-firmware 18.168.6.1-143.3.el9_4, +11 more
    fixed: vendor fix RHSA-2024:7484
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) iwl100-firmware 39.31.5.1-114.3.el8_6.1, iwl5150-firmware 8.24.2.2-114.3.el8_6.1, iwl1000-firmware 39.31.5.1-114.3.el8_6.1, iwl105-firmware 18.168.6.1-114.3.el8_6.1, iwl135-firmware 18.168.6.1-114.3.el8_6.1, iwl3945-firmware 15.32.2.9-114.3.el8_6.1, +15 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) iwl100-firmware 39.31.5.1-114.3.el8_6.1, iwl5150-firmware 8.24.2.2-114.3.el8_6.1, iwl1000-firmware 39.31.5.1-114.3.el8_6.1, iwl105-firmware 18.168.6.1-114.3.el8_6.1, iwl135-firmware 18.168.6.1-114.3.el8_6.1, iwl3945-firmware 15.32.2.9-114.3.el8_6.1, +15 more
    fixed: vendor fix RHSA-2024:7418
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8) iwl100-firmware 39.31.5.1-118.3.el8_8.1, iwl5150-firmware 8.24.2.2-118.3.el8_8.1, iwl1000-firmware 39.31.5.1-118.3.el8_8.1, iwl105-firmware 18.168.6.1-118.3.el8_8.1, iwl135-firmware 18.168.6.1-118.3.el8_8.1, iwl3945-firmware 15.32.2.9-118.3.el8_8.1, +15 more
    fixed: vendor fix RHSA-2024:7482
  • Red Hat Enterprise Linux BaseOS EUS (v.9.2) linux-firmware 20240905-138.3.el9_2, iwl100-firmware 39.31.5.1-138.3.el9_2, iwl5150-firmware 8.24.2.2-138.3.el9_2, iwl1000-firmware 39.31.5.1-138.3.el9_2, iwl105-firmware 18.168.6.1-138.3.el9_2, iwl135-firmware 18.168.6.1-138.3.el9_2, +11 more
    fixed: vendor fix RHSA-2024:7483
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) iwl100-firmware 39.31.5.1-114.3.el8_6.1, iwl5150-firmware 8.24.2.2-114.3.el8_6.1, iwl1000-firmware 39.31.5.1-114.3.el8_6.1, iwl105-firmware 18.168.6.1-114.3.el8_6.1, iwl135-firmware 18.168.6.1-114.3.el8_6.1, iwl3945-firmware 15.32.2.9-114.3.el8_6.1, +15 more
    fixed: vendor fix RHSA-2024:7418
  • Red Hat Enterprise Linux 6 linux-firmware Red Hat Enterprise Linux 7 linux-frmware Red Hat Enterprise Linux 10 linux-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.4 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

Affected products

  • AMD AMD EPYC™ 7003 Processors
  • AMD AMD EPYC™ 9004 Processors
  • AMD AMD EPYC™ Embedded 7003
  • AMD AMD EPYC™ Embedded 9004

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.