x86/CPU/AMD: Fix AMD TLBI Erratum #1718

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-99099
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-26 15:16:48 UTC
Updated2026-10-31 13:17:55 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Fix AMD TLBI Erratum #1718 The processor may fail to invalidate a TLB entry while executing an INVLPGB/TLBSYNC instruction pair. Detect the erratum and apply a software workaround when a microcode fix is not present.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001270000 probability, percentile 0.023910000 (date 2026-11-02)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 82378c6c2f435dba66145609de16bf44a9de6303 e3e6779f77ab6f0a1aa80e24868d2d89f31053fe git Not specified
CNA Linux Linux affected 82378c6c2f435dba66145609de16bf44a9de6303 098d80b04d0fe02889c332d061db968f070b83a6 git Not specified
CNA Linux Linux affected 82378c6c2f435dba66145609de16bf44a9de6303 87db7795cbaaf636ae22ae031f4906db7bb77803 git Not specified
CNA Linux Linux affected 6.15 Not specified
CNA Linux Linux unaffected 6.15 semver Not specified
CNA Linux Linux unaffected 6.18.57 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.11 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/87db7795cbaaf636ae22ae031f4906db7bb77803 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e3e6779f77ab6f0a1aa80e24868d2d89f31053fe 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/098d80b04d0fe02889c332d061db968f070b83a6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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