Input: evdev - sanitize event type index when fetching event masks

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74683
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:42 UTC
Updated2026-08-22 16:16:42 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: Input: evdev - sanitize event type index when fetching event masks The user-supplied event type index passed to EVIOCGMASK / EVIOCSMASK ioctls is used to index the static counts array in evdev_get_mask_cnt() and client evmasks array in evdev_get_mask(). While the event type is architecturally bounded by EV_CNT, speculative execution may mispredict bounds checks and perform out-of-bounds loads. Sanitize the event type index in evdev_get_mask_cnt() branchlessly using array_index_mask_nospec(). This clamps the index to 0 for safe array access and forces the returned count to 0 speculatively when the index is out of bounds. We do not need additional array_index_nospec() calls in evdev_get_mask() because evdev_get_mask_cnt() speculatively forces the count (and resulting xfer_size) to 0 for out-of-bounds types, preventing any speculative memory access to client evmasks array.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 c79b08d8fa230871a3634e34a66e591ac2d084ef git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 f27fa9b39f925d26e034a1f382cb45523138f4ae git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 f3fc329acad9a71b3c077237cbac20670d2358c8 git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 5db341189bb7ff041d570dbe36ecca7e32913927 git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 433913b4a92214d76e9f0c03ad9128fec943d5f8 git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 4034ef247a9dde3f56660b01f0c3280dac6b1274 git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 810e1883d4815f29c30d900ad7333d03cc2515d1 git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 3abd29c61d2ef37c4102cf755b18be53bb9dbea6 git Not specified
CNA Linux Linux affected 5.10.265 semver Not specified
CNA Linux Linux affected 5.15.216 semver Not specified
CNA Linux Linux affected 6.1.183 semver Not specified
CNA Linux Linux affected 6.6.152 semver Not specified
CNA Linux Linux affected 6.12.104 semver Not specified
CNA Linux Linux affected 6.18.45 semver Not specified
CNA Linux Linux affected 7.1.9 semver Not specified
CNA Linux Linux unaffected 5.10.265 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.216 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.183 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.152 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.104 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.45 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/4034ef247a9dde3f56660b01f0c3280dac6b1274 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3abd29c61d2ef37c4102cf755b18be53bb9dbea6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/433913b4a92214d76e9f0c03ad9128fec943d5f8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/810e1883d4815f29c30d900ad7333d03cc2515d1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f27fa9b39f925d26e034a1f382cb45523138f4ae 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5db341189bb7ff041d570dbe36ecca7e32913927 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f3fc329acad9a71b3c077237cbac20670d2358c8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c79b08d8fa230871a3634e34a66e591ac2d084ef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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