wifi: b43legacy: enforce bounds check on firmware key index in RX path

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Summary

CVECVE-2026-46163
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-28 10:16:31 UTC
Updated2026-06-10 21:13:41 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: wifi: b43legacy: enforce bounds check on firmware key index in RX path Same fix as b43: the firmware-controlled key index in b43legacy_rx() can exceed dev->max_nr_keys. The existing B43legacy_WARN_ON is non-enforcing in production builds, allowing an out-of-bounds read of dev->key[]. Make the check enforcing by dropping the frame for invalid indices.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000320000 probability, percentile 0.097350000 (date 2026-06-04)

Problem Types: CWE-129

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 75388acd0cd827dc1498043daa7d1c760902cd67 a92bd0503df2488f2cc040f329ebccff1c1934cb git Not specified
CNA Linux Linux affected 75388acd0cd827dc1498043daa7d1c760902cd67 df805c1d085b7a96077f0964185764c87060950d git Not specified
CNA Linux Linux affected 75388acd0cd827dc1498043daa7d1c760902cd67 4242db36de99de734cc1f60e5edd86cda7e598c6 git Not specified
CNA Linux Linux affected 75388acd0cd827dc1498043daa7d1c760902cd67 1baaeb6adecb9691748c0253dab6ddd19a2b4e9e git Not specified
CNA Linux Linux affected 75388acd0cd827dc1498043daa7d1c760902cd67 6ee946077607d7783ae6709a899213fc4fe08f35 git Not specified
CNA Linux Linux affected 75388acd0cd827dc1498043daa7d1c760902cd67 9d1bc155802943e92c57a5fb923d23edfbf0b525 git Not specified
CNA Linux Linux affected 75388acd0cd827dc1498043daa7d1c760902cd67 fdd4e51979f42ca8b1ab7e6176b607e1caabf2a5 git Not specified
CNA Linux Linux affected 75388acd0cd827dc1498043daa7d1c760902cd67 a035766f970bde2d4298346a31a80685be5c0205 git Not specified
CNA Linux Linux affected 2.6.24 Not specified
CNA Linux Linux unaffected 2.6.24 semver Not specified
CNA Linux Linux unaffected 5.10.258 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.88 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.30 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.7 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9d1bc155802943e92c57a5fb923d23edfbf0b525 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/df805c1d085b7a96077f0964185764c87060950d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6ee946077607d7783ae6709a899213fc4fe08f35 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/fdd4e51979f42ca8b1ab7e6176b607e1caabf2a5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1baaeb6adecb9691748c0253dab6ddd19a2b4e9e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4242db36de99de734cc1f60e5edd86cda7e598c6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a035766f970bde2d4298346a31a80685be5c0205 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a92bd0503df2488f2cc040f329ebccff1c1934cb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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