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Fencer Vulns
medium 6.0

CVE-2023-31346 json

Failure to initialize memory in SEV Firmware may allow a privileged attacker to access stale data from other guests.

published 2024-02-13 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-35657

cvss
6.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 23%
public exploits
0
none known

Summary

Failure to initialize memory in SEV Firmware may allow a privileged attacker to access stale data from other guests.

Patch / fix

  • amd epyc_7773x_firmware milanpi_1.0.0.c
  • amd epyc_7763_firmware milanpi_1.0.0.c
  • amd epyc_7713_firmware milanpi_1.0.0.c
  • amd epyc_7713p_firmware milanpi_1.0.0.c
  • amd epyc_7663_firmware milanpi_1.0.0.c
  • amd epyc_7663p_firmware milanpi_1.0.0.c
  • amd epyc_7643_firmware milanpi_1.0.0.c
  • amd epyc_7643p_firmware milanpi_1.0.0.c
  • amd epyc_7573x_firmware milanpi_1.0.0.c
  • amd epyc_75f3_firmware milanpi_1.0.0.c
  • amd epyc_7543_firmware milanpi_1.0.0.c
  • amd epyc_7543p_firmware milanpi_1.0.0.c
  • amd epyc_7513_firmware milanpi_1.0.0.c
  • amd epyc_7453_firmware milanpi_1.0.0.c
  • amd epyc_7473x_firmware milanpi_1.0.0.c
  • amd epyc_74f3_firmware milanpi_1.0.0.c
  • amd epyc_7443_firmware milanpi_1.0.0.c
  • amd epyc_7443p_firmware milanpi_1.0.0.c
  • amd epyc_7413_firmware milanpi_1.0.0.c
  • amd epyc_7373x_firmware milanpi_1.0.0.c
  • linux-firmware RHEL 9 20240603-143.1.el9_4
  • iwl100-firmware RHEL 9 39.31.5.1-143.1.el9_4
  • iwl105-firmware RHEL 9 18.168.6.1-143.1.el9_4
  • iwl135-firmware RHEL 9 18.168.6.1-143.1.el9_4
  • iwl1000-firmware RHEL 9 1:39.31.5.1-143.1.el9_4
  • iwl2000-firmware RHEL 9 18.168.6.1-143.1.el9_4
  • iwl2030-firmware RHEL 9 18.168.6.1-143.1.el9_4
  • iwl3160-firmware RHEL 9 1:25.30.13.0-143.1.el9_4

red hat advisories RHSA-2024:5883RHSA-2024:5640RHSA-2024:4733RHSA-2024:4741RHSA-2024:4774RHSA-2024:4409

  • linux-firmware AlmaLinux 9 20240603-143.1.el9_4
  • iwl100-firmware AlmaLinux 9 39.31.5.1-143.1.el9_4
  • iwl105-firmware AlmaLinux 9 18.168.6.1-143.1.el9_4
  • iwl135-firmware AlmaLinux 9 18.168.6.1-143.1.el9_4
  • iwl1000-firmware AlmaLinux 9 1:39.31.5.1-143.1.el9_4
  • iwl2000-firmware AlmaLinux 9 18.168.6.1-143.1.el9_4
  • iwl2030-firmware AlmaLinux 9 18.168.6.1-143.1.el9_4
  • iwl3160-firmware AlmaLinux 9 1:25.30.13.0-143.1.el9_4

almalinux advisories ALSA-2024:4774ALSA-2024:4262

  • linux-firmware Rocky Linux 8 20240610-122.git90df68d2.el8_10

rocky linux advisories RLSA-2024:4262

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-2023-31346 updated cvss 4.4

kernel: Reserved fields in guest message responses may not be zero initialized

  • Red Hat Enterprise Linux 6 linux-firmware Red Hat Enterprise Linux 7 linux-firmware, iwl100-firmware, iwl105-firmware, iwl135-firmware, iwl1000-firmware, iwl2000-firmware, +12 more
    affected: workaround, no fix available
  • Red Hat Enterprise Linux BaseOS (v. 8) iwl100-firmware 39.31.5.1-122.el8_10.1, iwl5150-firmware 8.24.2.2-122.el8_10.1, iwl1000-firmware 39.31.5.1-122.el8_10.1, iwl105-firmware 18.168.6.1-122.el8_10.1, iwl135-firmware 18.168.6.1-122.el8_10.1, iwl3945-firmware 15.32.2.9-122.el8_10.1, +15 more
    fixed: vendor fix RHSA-2024:4262
  • Red Hat Enterprise Linux BaseOS (v. 9) linux-firmware 20240603-143.1.el9_4, iwl100-firmware 39.31.5.1-143.1.el9_4, iwl5150-firmware 8.24.2.2-143.1.el9_4, iwl1000-firmware 39.31.5.1-143.1.el9_4, iwl105-firmware 18.168.6.1-143.1.el9_4, iwl135-firmware 18.168.6.1-143.1.el9_4, +11 more
    fixed: vendor fix RHSA-2024:4774
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) iwl100-firmware 39.31.5.1-102.2.el8_2.1, iwl5150-firmware 8.24.2.2-102.2.el8_2.1, iwl1000-firmware 39.31.5.1-102.2.el8_2.1, iwl105-firmware 18.168.6.1-102.2.el8_2.1, iwl135-firmware 18.168.6.1-102.2.el8_2.1, iwl3945-firmware 15.32.2.9-102.2.el8_2.1, +15 more
    fixed: vendor fix RHSA-2024:5883
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) iwl100-firmware 39.31.5.1-106.1.el8_4.1, iwl5150-firmware 8.24.2.2-106.1.el8_4.1, iwl1000-firmware 39.31.5.1-106.1.el8_4.1, iwl105-firmware 18.168.6.1-106.1.el8_4.1, iwl135-firmware 18.168.6.1-106.1.el8_4.1, iwl3945-firmware 15.32.2.9-106.1.el8_4.1, +15 more
    fixed: vendor fix RHSA-2024:4733
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) iwl100-firmware 39.31.5.1-114.1.el8_6.1, iwl5150-firmware 8.24.2.2-114.1.el8_6.1, iwl1000-firmware 39.31.5.1-114.1.el8_6.1, iwl105-firmware 18.168.6.1-114.1.el8_6.1, iwl135-firmware 18.168.6.1-114.1.el8_6.1, iwl3945-firmware 15.32.2.9-114.1.el8_6.1, +15 more
    fixed: vendor fix RHSA-2024:4409
  • Red Hat Enterprise Linux BaseOS E4S (v.8.4) iwl100-firmware 39.31.5.1-106.1.el8_4.1, iwl5150-firmware 8.24.2.2-106.1.el8_4.1, iwl1000-firmware 39.31.5.1-106.1.el8_4.1, iwl105-firmware 18.168.6.1-106.1.el8_4.1, iwl135-firmware 18.168.6.1-106.1.el8_4.1, iwl3945-firmware 15.32.2.9-106.1.el8_4.1, +15 more
    fixed: vendor fix RHSA-2024:4733
  • Red Hat Enterprise Linux BaseOS E4S (v.8.6) iwl100-firmware 39.31.5.1-114.1.el8_6.1, iwl5150-firmware 8.24.2.2-114.1.el8_6.1, iwl1000-firmware 39.31.5.1-114.1.el8_6.1, iwl105-firmware 18.168.6.1-114.1.el8_6.1, iwl135-firmware 18.168.6.1-114.1.el8_6.1, iwl3945-firmware 15.32.2.9-114.1.el8_6.1, +15 more
    fixed: vendor fix RHSA-2024:4409
show 4 more
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8) iwl100-firmware 39.31.5.1-118.1.el8_8.1, iwl5150-firmware 8.24.2.2-118.1.el8_8.1, iwl1000-firmware 39.31.5.1-118.1.el8_8.1, iwl105-firmware 18.168.6.1-118.1.el8_8.1, iwl135-firmware 18.168.6.1-118.1.el8_8.1, iwl3945-firmware 15.32.2.9-118.1.el8_8.1, +15 more
    fixed: vendor fix RHSA-2024:4741
  • Red Hat Enterprise Linux BaseOS EUS (v.9.2) linux-firmware 20240603-138.1.el9_2, iwl100-firmware 39.31.5.1-138.1.el9_2, iwl5150-firmware 8.24.2.2-138.1.el9_2, iwl1000-firmware 39.31.5.1-138.1.el9_2, iwl105-firmware 18.168.6.1-138.1.el9_2, iwl135-firmware 18.168.6.1-138.1.el9_2, +11 more
    fixed: vendor fix RHSA-2024:5640
  • Red Hat Enterprise Linux BaseOS TUS (v.8.4) iwl100-firmware 39.31.5.1-106.1.el8_4.1, iwl5150-firmware 8.24.2.2-106.1.el8_4.1, iwl1000-firmware 39.31.5.1-106.1.el8_4.1, iwl105-firmware 18.168.6.1-106.1.el8_4.1, iwl135-firmware 18.168.6.1-106.1.el8_4.1, iwl3945-firmware 15.32.2.9-106.1.el8_4.1, +15 more
    fixed: vendor fix RHSA-2024:4733
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) iwl100-firmware 39.31.5.1-114.1.el8_6.1, iwl5150-firmware 8.24.2.2-114.1.el8_6.1, iwl1000-firmware 39.31.5.1-114.1.el8_6.1, iwl105-firmware 18.168.6.1-114.1.el8_6.1, iwl135-firmware 18.168.6.1-114.1.el8_6.1, iwl3945-firmware 15.32.2.9-114.1.el8_6.1, +15 more
    fixed: vendor fix RHSA-2024:4409

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

0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
NVD 3.1 6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
CNA 3.1 6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

Affected products

  • AMD 3rd Gen AMD EPYC™ Processors
  • AMD 4th Gen AMD EPYC™ Processors

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.