wifi: mt76: mt7925: validate skb length in testmode query

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Summary

CVECVE-2026-74324
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:33 UTC
Updated2026-08-15 06:22:33 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7925: validate skb length in testmode query In mt7925_tm_query(), the response skb from mt76_mcu_send_and_get_msg() is used in a memcpy without validating its length: memcpy(evt_resp, skb->data + 8, MT7925_EVT_RSP_LEN); where MT7925_EVT_RSP_LEN is 512. If the firmware returns a response shorter than 520 bytes (8 + 512), this reads beyond the skb data buffer. The over-read data is then returned to userspace via nla_put() in mt7925_testmode_dump(). Add a length check before the memcpy to ensure the skb contains sufficient data.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c948b5da6bbec742b433138e3e3f9537a85af2e5 c386e90a7ce8ddec9f038e9437661a2821b0ce89 git Not specified
CNA Linux Linux affected c948b5da6bbec742b433138e3e3f9537a85af2e5 e8b214b6d6e1902025452db0a0af73dc9693e4ba git Not specified
CNA Linux Linux affected c948b5da6bbec742b433138e3e3f9537a85af2e5 c7369a00860a0704461d440e7c3bf9b49bfdbaee git Not specified
CNA Linux Linux affected 6.7 Not specified
CNA Linux Linux unaffected 6.7 semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/c7369a00860a0704461d440e7c3bf9b49bfdbaee 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e8b214b6d6e1902025452db0a0af73dc9693e4ba 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c386e90a7ce8ddec9f038e9437661a2821b0ce89 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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