Bug 2559545 (CVE-2026-98891) - CVE-2026-98891 kernel: wifi: mac80211: validate deauth frame length before reason access
Summary: CVE-2026-98891 kernel: wifi: mac80211: validate deauth frame length before re...
Keywords:
Status: NEW
Alias: CVE-2026-98891
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-23 11:52 UTC by OSIDB Bzimport
Modified: 2026-10-26 13:40 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-10-23 11:52:11 UTC 
In the Linux kernel, the following vulnerability has been resolved:

wifi: mac80211: validate deauth frame length before reason access

ieee80211_rx_mgmt_deauth() reads the deauth reason code before checking
that the fixed field is actually present in the received frame.

Validate the deauth frame length first and only then read the reason
code.
Comment 1 Mauro Matteo Cascella 2026-10-26 13:33:01 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98891.mbox
Note You need to log in before you can comment on or make changes to this bug.