{"id":"CVE-2026-98196","state":"PUBLISHED","title":"wifi: brcmsmac: fix UAF in brcms_free_timer()","description":"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.","publishedAt":"2026-10-06T08:44:35.616Z","updatedAt":"2026-10-19T09:15:27.411Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"10eeb0b29fd7f52487c9ae573e8d79c210a0095d","versionType":"git"},{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"74acccc928851f69184271832d690607877122af","versionType":"git"},{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"050d2486e8ed2c0a23b87249ccd23e8072721391","versionType":"git"},{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"856dabd5f2617efb23c043be9e1b22a9e6e97c41","versionType":"git"},{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"2a4841ff0b74b495cddd31ae324e922217fc2f13","versionType":"git"},{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"1edb3ddd261e973a4d577c0547e63bfa25a8170d","versionType":"git"},{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"777cb6bba59e875b16a1d8897a483a5fecfcd5d2","versionType":"git"},{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"1eeca1d5e0920fbdad6449768fd2d4364e714180","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/broadcom/brcm80211/brcmsmac/mac80211_if.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.2","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/broadcom/brcm80211/brcmsmac/mac80211_if.c"]}],"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"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98196.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98196","state":"PUBLISHED","datePublished":"2026-10-06T08:44:35.616Z","dateUpdated":"2026-10-19T09:15:27.411Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.324Z"},"containers":{"cna":{"title":"wifi: brcmsmac: fix UAF in brcms_free_timer()","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"10eeb0b29fd7f52487c9ae573e8d79c210a0095d","versionType":"git"},{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"74acccc928851f69184271832d690607877122af","versionType":"git"},{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"050d2486e8ed2c0a23b87249ccd23e8072721391","versionType":"git"},{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"856dabd5f2617efb23c043be9e1b22a9e6e97c41","versionType":"git"},{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"2a4841ff0b74b495cddd31ae324e922217fc2f13","versionType":"git"},{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"1edb3ddd261e973a4d577c0547e63bfa25a8170d","versionType":"git"},{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"777cb6bba59e875b16a1d8897a483a5fecfcd5d2","versionType":"git"},{"version":"5b435de0d786869c95d1962121af0d7df2542009","status":"affected","lessThan":"1eeca1d5e0920fbdad6449768fd2d4364e714180","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/broadcom/brcm80211/brcmsmac/mac80211_if.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.2","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/broadcom/brcm80211/brcmsmac/mac80211_if.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/10eeb0b29fd7f52487c9ae573e8d79c210a0095d"},{"url":"https://git.kernel.org/stable/c/74acccc928851f69184271832d690607877122af"},{"url":"https://git.kernel.org/stable/c/050d2486e8ed2c0a23b87249ccd23e8072721391"},{"url":"https://git.kernel.org/stable/c/856dabd5f2617efb23c043be9e1b22a9e6e97c41"},{"url":"https://git.kernel.org/stable/c/2a4841ff0b74b495cddd31ae324e922217fc2f13"},{"url":"https://git.kernel.org/stable/c/1edb3ddd261e973a4d577c0547e63bfa25a8170d"},{"url":"https://git.kernel.org/stable/c/777cb6bba59e875b16a1d8897a483a5fecfcd5d2"},{"url":"https://git.kernel.org/stable/c/1eeca1d5e0920fbdad6449768fd2d4364e714180"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:15:27.411Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}