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Fencer Vulns
medium 4.6

CVE-2025-29943 json

Write what were condition within AMD CPUs may allow an admin-privileged attacker to modify the configuration of the CPU pipeline potentiall…

published 2026-01-16 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-2929

cvss
4.6
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits
0
none known

Summary

Write what were condition within AMD CPUs may allow an admin-privileged attacker to modify the configuration of the CPU pipeline potentially resulting in the corruption of the stack pointer inside an SEV-SNP guest.

Patch / fix

  • AMD AMD EPYC™ 9004 Series Processors Genoa++_1.0.0.H
  • AMD AMD EPYC™ 9005 Series Processors TurinPI_1.0.0.6
  • AMD AMD EPYC™ 8004 Series Processors Genoa++_1.0.0.H
  • AMD AMD EPYC™ Embedded 7003 Series Processors EmbMilanPI-SP3 v9 1.0.0.C
  • AMD AMD EPYC™ Embedded 9005 Series Processors EmbTurinPI-SP5_1.0.0.1
  • amd64-microcode Debian 14 3.20251202.1

debian advisories DEBIAN-CVE-2025-29943

  • amd64-microcode Ubuntu 24.04 LTS 3.20251202.1ubuntu0.24.04.1
  • amd64-microcode Ubuntu 25.10 3.20251202.1ubuntu0.25.10.1
  • amd64-microcode Ubuntu 26.04 LTS 3.20251202.1ubuntu1

ubuntu advisories UBUNTU-CVE-2025-29943

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

  • spectre-meltdown-checker openSUSE Tumbleweed 26.36.0602723-1.1

opensuse advisories openSUSE-SU-2026:11242-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
9 mo ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 4.6 CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
CNA 4.0 4.6 CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/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:X

Affected products

  • AMD AMD EPYC™ 9004 Series Processors
  • AMD AMD EPYC™ 9005 Series Processors
  • AMD AMD EPYC™ 8004 Series Processors
  • AMD AMD EPYC™ Embedded 7003 Series Processors
  • AMD AMD EPYC™ Embedded 9005 Series Processors

Classification

Weakness
  • CWE-123 Write-what-where Condition

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.