Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f before 4ae6ed5b6074df5f3da05fd74c40bb24c5c9b41d; affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f before d31f655e44631891788ca67018ec5e1ed1c7de86; affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f before 03525b632908b049f4d04cc8a71cdff2329589cf; affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f before 5cc54a000960bc88f8c58940164dca0e601ab39c; affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f before 437f3727b4fd715266c296435c116288f82666fd |
| Linux / Linux | affected 3.17; unaffected 0 before 3.17; unaffected 6.6.160 through 6.6.*; unaffected 6.12.113 through 6.12.*; unaffected 6.18.56 through 6.18.*; unaffected 7.2.10 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4ae6ed5b6074df5f3da05fd74c40bb24c5c9b41d
- https://git.kernel.org/stable/c/d31f655e44631891788ca67018ec5e1ed1c7de86
- https://git.kernel.org/stable/c/03525b632908b049f4d04cc8a71cdff2329589cf
- https://git.kernel.org/stable/c/5cc54a000960bc88f8c58940164dca0e601ab39c
- https://git.kernel.org/stable/c/437f3727b4fd715266c296435c116288f82666fd