CVE-2026-98709

Description

In 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.

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Produits concernés

• Linux

Références

• https://git.kernel.org/stable/c/03525b632908b049f4d04cc8a71cdff2329589cf
• https://git.kernel.org/stable/c/437f3727b4fd715266c296435c116288f82666fd
• https://git.kernel.org/stable/c/4ae6ed5b6074df5f3da05fd74c40bb24c5c9b41d
• https://git.kernel.org/stable/c/5cc54a000960bc88f8c58940164dca0e601ab39c
• https://git.kernel.org/stable/c/d31f655e44631891788ca67018ec5e1ed1c7de86

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories