fwctl: pds: Validate RPC input size before parsing

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Summary

CVECVE-2026-64101
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:51 UTC
Updated2026-07-19 16:17:51 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: fwctl: pds: Validate RPC input size before parsing The fwctl core allocates the device-specific RPC input buffer with fwctl_rpc.in_len and passes that buffer to the driver callback. pdsfc_fw_rpc() casts the buffer to struct fwctl_rpc_pds and then calls pdsfc_validate_rpc(), which reads fields from that structure before checking that the input buffer is large enough to contain it. A short in_len can make pds_fwctl read beyond the allocation. Reject pds RPC buffers that are smaller than struct fwctl_rpc_pds before parsing any pds-specific fields.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 92c66ee829b99a860a90f62ef16df3e42f92edac 9e3f18883a98420a3b8873c6f894bc57e9b98e41 git Not specified
CNA Linux Linux affected 92c66ee829b99a860a90f62ef16df3e42f92edac 0d470d36551058e3f728574308b815a80bca710f git Not specified
CNA Linux Linux affected 92c66ee829b99a860a90f62ef16df3e42f92edac e7537735028c3ad4b0bfc02ff8fa2a1a28aa04fe git Not specified
CNA Linux Linux affected 6.15 Not specified
CNA Linux Linux unaffected 6.15 semver Not specified
CNA Linux Linux unaffected 6.18.34 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.11 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9e3f18883a98420a3b8873c6f894bc57e9b98e41 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e7537735028c3ad4b0bfc02ff8fa2a1a28aa04fe 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0d470d36551058e3f728574308b815a80bca710f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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