CVE-2026-98709

wifi: mac80211: count only matching reservations in reserved switch

State: Published
Severity: Not scored
Published: Oct 18, 2026
Updated: Oct 30, 2026
Reserved: Sep 25, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before 4c4671a706d2d85442a30850abfada5377ffbbc8Affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before 183cc72ae9467717afba8b8d194a558a6666cb53Affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before b3d9f582f98e06070d5233b177b2899b693a01ecAffected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before 4ae6ed5b6074df5f3da05fd74c40bb24c5c9b41dAffected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before d31f655e44631891788ca67018ec5e1ed1c7de86Affected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before 03525b632908b049f4d04cc8a71cdff2329589cfAffected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before 5cc54a000960bc88f8c58940164dca0e601ab39cAffected 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before 437f3727b4fd715266c296435c116288f82666fdAffected
LinuxLinux	3.17Affected before 3.17Not affected 5.10.273 through 5.10.Not affected 5.15.224 through 5.15.Not affected 6.1.191 through 6.1.Not affected 6.6.160 through 6.6.Not affected 6.12.113 through 6.12.Not affected 6.18.56 through 6.18.Not affected 7.2.10 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before 4c4671a706d2d85442a30850abfada5377ffbbc8Affected
5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before 183cc72ae9467717afba8b8d194a558a6666cb53Affected
5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before b3d9f582f98e06070d5233b177b2899b693a01ecAffected
5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before 4ae6ed5b6074df5f3da05fd74c40bb24c5c9b41dAffected
5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before d31f655e44631891788ca67018ec5e1ed1c7de86Affected
5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before 03525b632908b049f4d04cc8a71cdff2329589cfAffected
5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before 5cc54a000960bc88f8c58940164dca0e601ab39cAffected
5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to before 437f3727b4fd715266c296435c116288f82666fdAffected

LinuxLinux

3.17Affected
before 3.17Not affected
5.10.273 through 5.10.*Not affected
5.15.224 through 5.15.*Not affected
6.1.191 through 6.1.*Not affected
6.6.160 through 6.6.*Not affected
6.12.113 through 6.12.*Not affected
6.18.56 through 6.18.*Not affected
7.2.10 through 7.2.*Not affected
7.3 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.