wifi: mac80211: count only matching reservations in reserved switch
Summary
| CVE | CVE-2026-98709 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-18 16:17:24 UTC |
| Updated | 2026-10-30 13:21:20 UTC |
| 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. |
Risk And Classification
EPSS: 0.001760000 probability, percentile 0.071550000 (date 2026-11-01)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f 4c4671a706d2d85442a30850abfada5377ffbbc8 git | Not specified |
| CNA | Linux | Linux | affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f 183cc72ae9467717afba8b8d194a558a6666cb53 git | Not specified |
| CNA | Linux | Linux | affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f b3d9f582f98e06070d5233b177b2899b693a01ec git | Not specified |
| CNA | Linux | Linux | affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f 4ae6ed5b6074df5f3da05fd74c40bb24c5c9b41d git | Not specified |
| 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 5.10.273 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.224 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.191 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.160 6.6.* 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
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/183cc72ae9467717afba8b8d194a558a6666cb53 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| 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/b3d9f582f98e06070d5233b177b2899b693a01ec | 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/4ae6ed5b6074df5f3da05fd74c40bb24c5c9b41d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/4c4671a706d2d85442a30850abfada5377ffbbc8 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/5cc54a000960bc88f8c58940164dca0e601ab39c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.