drm/amd/ras: Fix NULL deref in ras_core_get_utc_second_timestamp()

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Summary

CVECVE-2026-53315
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-26 20:17:24 UTC
Updated2026-06-26 20:17:24 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/amd/ras: Fix NULL deref in ras_core_get_utc_second_timestamp() ras_core_get_utc_second_timestamp() retrieves the current UTC timestamp (in seconds since the Unix epoch) through a platform-specific RAS system callback and is used for timestamping RAS error events. The function checks ras_core in the conditional statement before calling the sys_fn callback. However, when the condition fails, the function prints an error message using ras_core->dev. If ras_core is NULL, this can lead to a potential NULL pointer dereference when accessing ras_core->dev. Add an early NULL check for ras_core at the beginning of the function and return 0 when the pointer is not valid. This prevents the dereference and makes the control flow clearer.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 13c91b5b4378b5d08dc9ae9121b1645a0beec0bb 6c84f7f0afc415691ffa7d48aa7ce1d8e6083032 git Not specified
CNA Linux Linux affected 13c91b5b4378b5d08dc9ae9121b1645a0beec0bb 2b8101cc3b34d4d80d799360d2744829d5964479 git Not specified
CNA Linux Linux affected 6.19 Not specified
CNA Linux Linux unaffected 6.19 semver Not specified
CNA Linux Linux unaffected 7.0.10 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/6c84f7f0afc415691ffa7d48aa7ce1d8e6083032 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2b8101cc3b34d4d80d799360d2744829d5964479 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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