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CVE-2026-98196

Unknown

Last modified

CVE-2026-98196 is a vulnerability of currently unknown severity. 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..

Description

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 5b435de0d786869c95d1962121af0d7df2542009, < 10eeb0b29fd7f52487c9ae573e8d79c210a0095d; >= 5b435de0d786869c95d1962121af0d7df2542009, < 74acccc928851f69184271832d690607877122af; >= 5b435de0d786869c95d1962121af0d7df2542009, < 050d2486e8ed2c0a23b87249ccd23e8072721391; >= 5b435de0d786869c95d1962121af0d7df2542009, < 856dabd5f2617efb23c043be9e1b22a9e6e97c41; >= 5b435de0d786869c95d1962121af0d7df2542009, < 2a4841ff0b74b495cddd31ae324e922217fc2f13; >= 5b435de0d786869c95d1962121af0d7df2542009, < 1edb3ddd261e973a4d577c0547e63bfa25a8170d; >= 5b435de0d786869c95d1962121af0d7df2542009, < 777cb6bba59e875b16a1d8897a483a5fecfcd5d2; >= 5b435de0d786869c95d1962121af0d7df2542009, < 1eeca1d5e0920fbdad6449768fd2d4364e714180
LinuxLinux3.2

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98196?
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.
How severe is CVE-2026-98196?
Severity scoring for CVE-2026-98196 is pending analysis.
How do I fix CVE-2026-98196?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST