HID: bpf: cast size to ssize_t when checking hid_bpf_hw_request

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98860
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-18 16:17:40 UTC
Updated2026-10-19 10:19:50 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: HID: bpf: cast size to ssize_t when checking hid_bpf_hw_request As reported by Sashiko: If a transport driver encounters a hardware error and returns a negative error code such as -EPIPE, ret is implicitly promoted to size_t when compared against size. This causes the negative error code to evaluate as a large positive number, making the (ret > size) condition true. This silently converts the hardware error into a success return value and copies the unmodified buffer back, which could leave BPF programs operating on uninitialized or stale data. Fix this by casting size into ssize_t to return the actual negative error code.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d6efaa50af62fb0790dd1fd4e7e5506b46312510 8b85ef0f561039e249c3f883c5280a1449c6dbee git Not specified
CNA Linux Linux affected 73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1 97be6396817bd3b11d06239010d27902940bfaa9 git Not specified
CNA Linux Linux affected 2b658c1c442ec1cd9eec5ead98d68662c40fe645 f9f808227554b2c116fd07dd2328ecd74ea3f411 git Not specified
CNA Linux Linux affected 2b658c1c442ec1cd9eec5ead98d68662c40fe645 3afefbfe55c2a8a0c4bdf6f4cc1f773da120027c git Not specified
CNA Linux Linux affected eb57dae20fdf6f3069cdc07821fa3bb46de381d7 git Not specified
CNA Linux Linux affected 6.12.78 6.12.113 semver Not specified
CNA Linux Linux affected 6.18.20 6.18.56 semver Not specified
CNA Linux Linux affected 6.19.10 6.20 semver Not specified
CNA Linux Linux affected 7.0 Not specified
CNA Linux Linux unaffected 7.0 semver Not specified
CNA Linux Linux unaffected 6.12.113 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.56 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.10 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/97be6396817bd3b11d06239010d27902940bfaa9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f9f808227554b2c116fd07dd2328ecd74ea3f411 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8b85ef0f561039e249c3f883c5280a1449c6dbee 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3afefbfe55c2a8a0c4bdf6f4cc1f773da120027c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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