drm/amd/ras: reset CPER ring on corrupt entry size

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98894
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-23 12:18:23 UTC
Updated2026-10-26 07:17:14 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/amd/ras: reset CPER ring on corrupt entry size When CPER ring overflow handling advances the read pointer, it trusts the parsed entry size from the current ring contents. Corrupt CPER data can produce an entry size that does not advance rptr after dword conversion and pointer masking. In that case the recovery loop keeps testing the same location while holding the CPER ring mutex. This can hang the worker that is writing the next CPER record. Detect a no-progress rptr update and reset the CPER ring to an empty state instead. This drops the corrupt contents and lets the writer leave the recovery path without spinning.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4058e7cbfd0fb0cae7cbb8035bb43c593cc7c964 a98d0d49757a113ce17960262b9cd4ccc1420108 git Not specified
CNA Linux Linux affected 4058e7cbfd0fb0cae7cbb8035bb43c593cc7c964 4d695e66d7027a0c78302e47ac76293675fbbb4d git Not specified
CNA Linux Linux affected 6.15 Not specified
CNA Linux Linux unaffected 6.15 semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/a98d0d49757a113ce17960262b9cd4ccc1420108 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4d695e66d7027a0c78302e47ac76293675fbbb4d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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