{"id":"CVE-2026-98196","summary":"wifi: brcmsmac: fix UAF in brcms_free_timer()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: brcmsmac: fix UAF in brcms_free_timer()\n\nbrcms_free_timer() calls brcms_del_timer() which uses the non-synchronous\ncancel_delayed_work() to cancel the timer's underlying delayed work.  If\nthe work callback (_brcms_timer) is already running, cancel_delayed_work()\nreturns false without waiting, and brcms_free_timer() proceeds to kfree(t)\nwhile the callback still accesses t through container_of().\n\nAdd an explicit cancel_delayed_work_sync() after brcms_del_timer() to\nguarantee that any in-flight callback has completed before the timer\nstructure is freed.","modified":"2026-10-07T02:47:32.085223931Z","published":"2026-10-06T08:44:35.616Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98196.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/050d2486e8ed2c0a23b87249ccd23e8072721391"},{"type":"WEB","url":"https://git.kernel.org/stable/c/10eeb0b29fd7f52487c9ae573e8d79c210a0095d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1edb3ddd261e973a4d577c0547e63bfa25a8170d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1eeca1d5e0920fbdad6449768fd2d4364e714180"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2a4841ff0b74b495cddd31ae324e922217fc2f13"},{"type":"WEB","url":"https://git.kernel.org/stable/c/74acccc928851f69184271832d690607877122af"},{"type":"WEB","url":"https://git.kernel.org/stable/c/777cb6bba59e875b16a1d8897a483a5fecfcd5d2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/856dabd5f2617efb23c043be9e1b22a9e6e97c41"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98196.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98196"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5b435de0d786869c95d1962121af0d7df2542009"},{"fixed":"10eeb0b29fd7f52487c9ae573e8d79c210a0095d"},{"fixed":"74acccc928851f69184271832d690607877122af"},{"fixed":"050d2486e8ed2c0a23b87249ccd23e8072721391"},{"fixed":"856dabd5f2617efb23c043be9e1b22a9e6e97c41"},{"fixed":"2a4841ff0b74b495cddd31ae324e922217fc2f13"},{"fixed":"1edb3ddd261e973a4d577c0547e63bfa25a8170d"},{"fixed":"777cb6bba59e875b16a1d8897a483a5fecfcd5d2"},{"fixed":"1eeca1d5e0920fbdad6449768fd2d4364e714180"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98196.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.2.0"},{"fixed":"5.10.271"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.222"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.189"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.158"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.112"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.54"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98196.json"}}],"schema_version":"1.9.0"}