CVE-2026-98196

Summary

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

VendorProductVersion RangeStatus
LinuxLinux5b435de0d786869c95d1962121af0d7df2542009 < 10eeb0b29fd7f52487c9ae573e8d79c210a0095daffected
LinuxLinux5b435de0d786869c95d1962121af0d7df2542009 < 74acccc928851f69184271832d690607877122afaffected
LinuxLinux5b435de0d786869c95d1962121af0d7df2542009 < 050d2486e8ed2c0a23b87249ccd23e8072721391affected
LinuxLinux5b435de0d786869c95d1962121af0d7df2542009 < 856dabd5f2617efb23c043be9e1b22a9e6e97c41affected
LinuxLinux5b435de0d786869c95d1962121af0d7df2542009 < 2a4841ff0b74b495cddd31ae324e922217fc2f13affected
LinuxLinux5b435de0d786869c95d1962121af0d7df2542009 < 1edb3ddd261e973a4d577c0547e63bfa25a8170daffected
LinuxLinux5b435de0d786869c95d1962121af0d7df2542009 < 777cb6bba59e875b16a1d8897a483a5fecfcd5d2affected
LinuxLinux5b435de0d786869c95d1962121af0d7df2542009 < 1eeca1d5e0920fbdad6449768fd2d4364e714180affected
LinuxLinux3.2affected
LinuxLinux0 < 3.2unaffected
LinuxLinux5.10.271 <= 5.10.*unaffected
LinuxLinux5.15.222 <= 5.15.*unaffected
LinuxLinux6.1.189 <= 6.1.*unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.112 <= 6.12.*unaffected
LinuxLinux6.18.54 <= 6.18.*unaffected
LinuxLinux7.2.8 <= 7.2.*unaffected
LinuxLinux7.3-rc4 <= *unaffected

Weaknesses

References