CVE-2026-98196wifi: brcmsmac: fix UAF in brcms_free_timer()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: wifi: brcmsmac: fix UAF in brcms_free_timer() brcms_free_timer() calls brcms_del_timer() which uses the non-synchronous cancel_delayed_work() to cancel the timer's underlying delayed work. If the work callback (_brcms_timer) is already running, cancel_delayed_work() returns false without waiting, and brcms_free_timer() proceeds to kfree(t) while the callback still accesses t through container_of(). Add an explicit cancel_delayed_work_sync() after brcms_del_timer() to guarantee that any in-flight callback has completed before the timer structure is freed.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 5b435de0d786869c95d1962121af0d7df2542009 before 10eeb0b29fd7f52487c9ae573e8d79c210a0095d; from 5b435de0d786869c95d1962121af0d7df2542009 before 74acccc928851f69184271832d690607877122af; from 5b435de0d786869c95d1962121af0d7df2542009 before 050d2486e8ed2c0a23b87249ccd23e8072721391; from 5b435de0d786869c95d1962121af0d7df2542009 before 856dabd5f2617efb23c043be9e1b22a9e6e97c41; 5b435de0d786869c95d1962121af0d7df2542009 builds before 2a4841ff0b74b495cddd31ae324e922217fc2f13; 5b435de0d786869c95d1962121af0d7df2542009 builds before 1edb3ddd261e973a4d577c0547e63bfa25a8170d; from 5b435de0d786869c95d1962121af0d7df2542009 before 777cb6bba59e875b16a1d8897a483a5fecfcd5d2; 5b435de0d786869c95d1962121af0d7df2542009 builds before 1eeca1d5e0920fbdad6449768fd2d4364e714180 | CNA record |
References
- https://git.kernel.org/stable/c/10eeb0b29fd7f52487c9ae573e8d79c210a0095d
- https://git.kernel.org/stable/c/74acccc928851f69184271832d690607877122af
- https://git.kernel.org/stable/c/050d2486e8ed2c0a23b87249ccd23e8072721391
- https://git.kernel.org/stable/c/856dabd5f2617efb23c043be9e1b22a9e6e97c41
- https://git.kernel.org/stable/c/2a4841ff0b74b495cddd31ae324e922217fc2f13
- https://git.kernel.org/stable/c/1edb3ddd261e973a4d577c0547e63bfa25a8170d
- https://git.kernel.org/stable/c/777cb6bba59e875b16a1d8897a483a5fecfcd5d2
- https://git.kernel.org/stable/c/1eeca1d5e0920fbdad6449768fd2d4364e714180
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.