What’s Vulnerable › Vulnerabilities

CVE-2026-98894: drm/amd/ras: reset CPER ring on corrupt entry size

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-23 · updated 2026-10-26

Description

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.

Affected products

• Linux kernel: before 6.18.53 — fixed in 6.18.53, 7.2

How to fix

Upgrade to a fixed version: Linux kernel 6.18.53, 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4d695e66d7027a0c78302e47ac76293675fbbb4d
• https://git.kernel.org/stable/c/a98d0d49757a113ce17960262b9cd4ccc1420108

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