wifi: mac80211: count only matching reservations in reserved switch

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98709
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-18 16:17:24 UTC
Updated2026-10-19 10:19:35 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: count only matching reservations in reserved switch ieee80211_vif_use_reserved_switch() validates a replacement by counting assigned links on ctx->replace_ctx and treating reservations too broadly. A link can still be assigned to the old channel context while holding a reservation that belongs to a different replacement operation. That can make the current replacement appear complete too early. If another link finalizes first, the function can free the WILL_BE_REPLACED chanctx while the unmatched link and driver still use it, leading to a use-after-free in later beacon generation. Require an in-place reservation to point at the current replacement context, and require the reserved and assigned contexts to be the matching replacement pair, before counting or moving the link.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f d31f655e44631891788ca67018ec5e1ed1c7de86 git Not specified
CNA Linux Linux affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f 03525b632908b049f4d04cc8a71cdff2329589cf git Not specified
CNA Linux Linux affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f 5cc54a000960bc88f8c58940164dca0e601ab39c git Not specified
CNA Linux Linux affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f 437f3727b4fd715266c296435c116288f82666fd git Not specified
CNA Linux Linux affected 3.17 Not specified
CNA Linux Linux unaffected 3.17 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/03525b632908b049f4d04cc8a71cdff2329589cf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d31f655e44631891788ca67018ec5e1ed1c7de86 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/437f3727b4fd715266c296435c116288f82666fd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5cc54a000960bc88f8c58940164dca0e601ab39c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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