Linux Kernel: AMD CPER Ring Rptr Progress Detected & Reset Flaw
CVE-2026-98894 Published on October 23, 2026
drm/amd/ras: reset CPER ring on corrupt entry size
In 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.
Products Associated with CVE-2026-98894
stack.watch emails you whenever new vulnerabilities are published in Linux Kernel or Canonical Ubuntu Linux. Just hit a watch button to start following.
Affected Versions
Linux:- Version 4058e7cbfd0fb0cae7cbb8035bb43c593cc7c964 and below a98d0d49757a113ce17960262b9cd4ccc1420108 is affected.
- Version 4058e7cbfd0fb0cae7cbb8035bb43c593cc7c964 and below 4d695e66d7027a0c78302e47ac76293675fbbb4d is affected.
- Version 6.15 is affected.
- Before 6.15 is unaffected.
- Version 6.18.53, <= 6.18.* is unaffected.
- Version 7.2, <= * is unaffected.