{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-39994","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T07:20:57.150Z","datePublished":"2025-10-15T07:58:19.503Z","dateUpdated":"2026-05-11T21:40:25.166Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:40:25.166Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: tuner: xc5000: Fix use-after-free in xc5000_release\n\nThe original code uses cancel_delayed_work() in xc5000_release(), which\ndoes not guarantee that the delayed work item timer_sleep has fully\ncompleted if it was already running. This leads to use-after-free scenarios\nwhere xc5000_release() may free the xc5000_priv while timer_sleep is still\nactive and attempts to dereference the xc5000_priv.\n\nA typical race condition is illustrated below:\n\nCPU 0 (release thread)                 | CPU 1 (delayed work callback)\nxc5000_release()                       | xc5000_do_timer_sleep()\n  cancel_delayed_work()                |\n  hybrid_tuner_release_state(priv)     |\n    kfree(priv)                        |\n                                       |   priv = container_of() // UAF\n\nReplace cancel_delayed_work() with cancel_delayed_work_sync() to ensure\nthat the timer_sleep is properly canceled before the xc5000_priv memory\nis deallocated.\n\nA deadlock concern was considered: xc5000_release() is called in a process\ncontext and is not holding any locks that the timer_sleep work item might\nalso need. Therefore, the use of the _sync() variant is safe here.\n\nThis bug was initially identified through static analysis.\n\n[hverkuil: fix typo in Subject: tunner -> tuner]"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/tuners/xc5000.c"],"versions":[{"version":"f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8","lessThan":"bc4ffd962ce16a154c44c68853b9d93f5b6fc4b8","status":"affected","versionType":"git"},{"version":"f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8","lessThan":"e2f5eaafc0306a76fb1cb760aae804b065b8a341","status":"affected","versionType":"git"},{"version":"f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8","lessThan":"3f876cd47ed8bca1e28d68435845949f51f90703","status":"affected","versionType":"git"},{"version":"f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8","lessThan":"df0303b4839520b84d9367c2fad65b13650a4d42","status":"affected","versionType":"git"},{"version":"f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8","lessThan":"71ed8b81a4906cb785966910f39cf7f5ad60a69e","status":"affected","versionType":"git"},{"version":"f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8","lessThan":"effb1c19583bca7022fa641a70766de45c6d41ac","status":"affected","versionType":"git"},{"version":"f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8","lessThan":"9a00de20ed8ba90888479749b87bc1532cded4ce","status":"affected","versionType":"git"},{"version":"f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8","lessThan":"4266f012806fc18e46da4a04d130df59a4946f93","status":"affected","versionType":"git"},{"version":"f7a27ff1fb77e114d1059a5eb2ed1cffdc508ce8","lessThan":"40b7a19f321e65789612ebaca966472055dab48c","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/tuners/xc5000.c"],"versions":[{"version":"3.16","status":"affected"},{"version":"0","lessThan":"3.16","status":"unaffected","versionType":"semver"},{"version":"5.4.301","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.246","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.195","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.156","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.111","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.51","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.16.11","lessThanOrEqual":"6.16.*","status":"unaffected","versionType":"semver"},{"version":"6.17.1","lessThanOrEqual":"6.17.*","status":"unaffected","versionType":"semver"},{"version":"6.18","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"5.4.301"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"5.10.246"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"5.15.195"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.1.156"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.6.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.12.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.16.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.17.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16","versionEndExcluding":"6.18"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/bc4ffd962ce16a154c44c68853b9d93f5b6fc4b8"},{"url":"https://git.kernel.org/stable/c/e2f5eaafc0306a76fb1cb760aae804b065b8a341"},{"url":"https://git.kernel.org/stable/c/3f876cd47ed8bca1e28d68435845949f51f90703"},{"url":"https://git.kernel.org/stable/c/df0303b4839520b84d9367c2fad65b13650a4d42"},{"url":"https://git.kernel.org/stable/c/71ed8b81a4906cb785966910f39cf7f5ad60a69e"},{"url":"https://git.kernel.org/stable/c/effb1c19583bca7022fa641a70766de45c6d41ac"},{"url":"https://git.kernel.org/stable/c/9a00de20ed8ba90888479749b87bc1532cded4ce"},{"url":"https://git.kernel.org/stable/c/4266f012806fc18e46da4a04d130df59a4946f93"},{"url":"https://git.kernel.org/stable/c/40b7a19f321e65789612ebaca966472055dab48c"}],"title":"media: tuner: xc5000: Fix use-after-free in xc5000_release","x_generator":{"engine":"bippy-1.2.0"}}}}