CVE-2025-29946

Insufficient or Incomplete Data Removal in Hardware Component in SEV firmware doesn't fully flush...

4.5 MediumFix available

Insufficient or Incomplete Data Removal in Hardware Component in SEV firmware doesn't fully flush IOMMU. This can potentially lead to a loss of confidentiality and integrity in guest memory.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: High
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: None

Exploit likelihood

0.16%Up 0.2 points since Feb 11, 2026

What each source reports

CVE List Score used 4.5

Insufficient or Incomplete Data Removal in Hardware Component in SEV firmware doesn't fully flush IOMMU. This can potentially lead to a loss of confidentiality and integrity in guest memory.

Record: CVE-2025-29946
CVSS 4.0: 4.5 MediumCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Weakness: CWE-1301
Updated: 2026-11-02

EUVDEUVD-2025-207134 4.5

Insufficient or Incomplete Data Removal in Hardware Component in SEV firmware doesn't fully flush IOMMU. This can potentially lead to a loss of confidentiality and integrity in guest memory.

Record: EUVD-2025-207134
CVSS 4.0: 4.5 MediumCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-gw24-f5j7-24m9 4.5

Insufficient or Incomplete Data Removal in Hardware Component in SEV firmware doesn't fully flush...

Insufficient or Incomplete Data Removal in Hardware Component in SEV firmware doesn't fully flush IOMMU. This can potentially lead to a loss of confidentiality and integrity in guest memory.

Record: GHSA-gw24-f5j7-24m9
CVSS 4.0: 4.5 MediumCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/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
Weakness: CWE-1301
Updated: 2026-11-02

NVD 4.5

Insufficient or Incomplete Data Removal in Hardware Component in SEV firmware doesn't fully flush IOMMU. This can potentially lead to a loss of confidentiality and integrity in guest memory.

Record: CVE-2025-29946
CVSS 4.0: 4.5 MediumCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/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
Weakness: CWE-1301
Updated: 2026-11-02

OSVDEBIAN-CVE-2025-29946 4.5

Insufficient or Incomplete Data Removal in Hardware Component in SEV firmware doesn't fully flush IOMMU. This can potentially lead to a loss of confidentiality and integrity in guest memory.

Record: DEBIAN-CVE-2025-29946
CVSS 4.0: 4.5 MediumCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/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
Updated: 2026-11-07

OSVUBUNTU-CVE-2025-29946 4.5

Insufficient or Incomplete Data Removal in Hardware Component in SEV firmware doesn't fully flush IOMMU. This can potentially lead to a loss of confidentiality and integrity in guest memory.

Record: UBUNTU-CVE-2025-29946
CVSS 4.0: 4.5 MediumCVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`amd64-microcode` Debian:12	All versions, plus listed versions 0.20120117-11.20120117-11.20120117-21.20120117-2~bpo60+11.20120910-1 Show 45 moreShow less 1.20120910-1~bpo60+11.20120910-21.20120910-2~bpo60+11.20120910-31.20141028.11.20160316.12.20120910-12.20120910-1~bpo70+12.20131007.12.20131007.1+really20130710.12.20141028.12.20141028.1~bpo70+12.20160316.12.20160316.1~bpo70+12.20160316.1~deb8u13.20160316.13.20160316.23.20160316.33.20171205.13.20171205.23.20180515.13.20180524.13.20180524.1~bpo9+13.20181128.13.20181128.1~bpo9+13.20181128.1~deb8u13.20181128.1~deb9u13.20181128.1~deb9u23.20191021.13.20191218.13.20220411.13.20220411.23.20230414.13.20230719.13.20230719.1~deb10u13.20230719.1~deb11u13.20230719.1~deb12u13.20230808.13.20230808.1.13.20230808.1.1~deb11u13.20230808.1.1~deb12u13.20230823.13.20231019.13.20240116.23.20240116.2+nmu1	None known
`amd64-microcode` Debian:13	All versions, plus listed versions 0.20120117-11.20120117-11.20120117-21.20120117-2~bpo60+11.20120910-1 Show 45 moreShow less 1.20120910-1~bpo60+11.20120910-21.20120910-2~bpo60+11.20120910-31.20141028.11.20160316.12.20120910-12.20120910-1~bpo70+12.20131007.12.20131007.1+really20130710.12.20141028.12.20141028.1~bpo70+12.20160316.12.20160316.1~bpo70+12.20160316.1~deb8u13.20160316.13.20160316.23.20160316.33.20171205.13.20171205.23.20180515.13.20180524.13.20180524.1~bpo9+13.20181128.13.20181128.1~bpo9+13.20181128.1~deb8u13.20181128.1~deb9u13.20181128.1~deb9u23.20191021.13.20191218.13.20220411.13.20220411.23.20230414.13.20230719.13.20230719.1~deb10u13.20230719.1~deb11u13.20230719.1~deb12u13.20230808.13.20230808.1.13.20230808.1.1~deb11u13.20230808.1.1~deb12u13.20230823.13.20231019.13.20240116.23.20240116.2+nmu1	None known
`amd64-microcode` Debian:14	before 3.20260923.1, plus listed versions 0.20120117-11.20120117-11.20120117-21.20120117-2~bpo60+11.20120910-1 Show 45 moreShow less 1.20120910-1~bpo60+11.20120910-21.20120910-2~bpo60+11.20120910-31.20141028.11.20160316.12.20120910-12.20120910-1~bpo70+12.20131007.12.20131007.1+really20130710.12.20141028.12.20141028.1~bpo70+12.20160316.12.20160316.1~bpo70+12.20160316.1~deb8u13.20160316.13.20160316.23.20160316.33.20171205.13.20171205.23.20180515.13.20180524.13.20180524.1~bpo9+13.20181128.13.20181128.1~bpo9+13.20181128.1~deb8u13.20181128.1~deb9u13.20181128.1~deb9u23.20191021.13.20191218.13.20220411.13.20220411.23.20230414.13.20230719.13.20230719.1~deb10u13.20230719.1~deb11u13.20230719.1~deb12u13.20230808.13.20230808.1.13.20230808.1.1~deb11u13.20230808.1.1~deb12u13.20230823.13.20231019.13.20240116.23.20240116.2+nmu1	3.20260923.1
`amd64-microcode` Ubuntu:24.04:LTS	All versions, plus listed versions 3.20230808.1.1ubuntu13.20231019.1ubuntu13.20231019.1ubuntu23.20231019.1ubuntu2.13.20250311.1ubuntu0.24.04.13.20251202.1ubuntu0.24.04.1	None known
`amd64-microcode` Ubuntu:25.10	All versions, plus listed versions 3.20240820.1ubuntu13.20250311.1ubuntu13.20250708.1ubuntu13.20251202.1ubuntu0.25.10.1	None known
`amd64-microcode` Ubuntu:26.10	All versions, plus listed versions 3.20251202.1ubuntu2	None known
`amd64-microcode` Ubuntu:26.04:LTS	All versions, plus listed versions 3.20250708.1ubuntu13.20250708.1ubuntu23.20251202.1ubuntu13.20251202.1ubuntu2	None known

History

History
Recorded	Changed	Sources
Nov 7, 2026	affected, facts	OSV
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-29946 is a medium vulnerability (CVSS 4.5) in Amd Epyc™ 9005 Series Processors, published February 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.16%, the 4th percentile. Fixed in amd64-microcode 3.20260923.1.

References

This page doesn't list everything

Left out here: 35 versions. The JSON record has them.