{"id":"CVE-2026-89895","state":"PUBLISHED","title":"media: cobalt: Avoid freeing ALSA private data twice","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cobalt: Avoid freeing ALSA private data twice\n\nsnd_cobalt_card_create() stores cobsc in sc->private_data and installs\nsnd_cobalt_card_private_free() as sc->private_free. From that point,\nsnd_card_free(sc) releases cobsc through the ALSA card cleanup path.\n\nIf cobalt_alsa_init() fails after snd_cobalt_card_create(), the\nerr_exit_free path calls snd_card_free(sc) and then kfree(cobsc). That\nsecond free releases the same object again.\n\nRemove the explicit kfree(cobsc) and leave ownership with the ALSA card.\n\nThis issue was found by a static analysis checker and confirmed by\nmanual source review.","publishedAt":"2026-09-16T10:31:56.817Z","updatedAt":"2026-10-19T08:54:28.227Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"75bbf45e3a954e292ae26832d2df40ca2e3ee452","versionType":"git"},{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"fe65028ee72a7e07e572b351891bd7a1f8917d33","versionType":"git"},{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"61dfa8ded5efc3a25d331fa9ce5cebb85531fe70","versionType":"git"},{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8","versionType":"git"},{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"6cbc8a73b3464ebeccc49987b7233b6b087b8504","versionType":"git"},{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"cb1218da234ea15fa14d90e2d049d686874d7aa3","versionType":"git"},{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"8c6610e230b9355cf7df5a338a0592c0f088c00b","versionType":"git"},{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/pci/cobalt/cobalt-alsa-main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.2","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","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/media/pci/cobalt/cobalt-alsa-main.c"]}],"references":["https://git.kernel.org/stable/c/75bbf45e3a954e292ae26832d2df40ca2e3ee452","https://git.kernel.org/stable/c/fe65028ee72a7e07e572b351891bd7a1f8917d33","https://git.kernel.org/stable/c/61dfa8ded5efc3a25d331fa9ce5cebb85531fe70","https://git.kernel.org/stable/c/42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8","https://git.kernel.org/stable/c/6cbc8a73b3464ebeccc49987b7233b6b087b8504","https://git.kernel.org/stable/c/cb1218da234ea15fa14d90e2d049d686874d7aa3","https://git.kernel.org/stable/c/8c6610e230b9355cf7df5a338a0592c0f088c00b","https://git.kernel.org/stable/c/3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89895.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89895","state":"PUBLISHED","datePublished":"2026-09-16T10:31:56.817Z","dateUpdated":"2026-10-19T08:54:28.227Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.773Z"},"containers":{"cna":{"title":"media: cobalt: Avoid freeing ALSA private data twice","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cobalt: Avoid freeing ALSA private data twice\n\nsnd_cobalt_card_create() stores cobsc in sc->private_data and installs\nsnd_cobalt_card_private_free() as sc->private_free. From that point,\nsnd_card_free(sc) releases cobsc through the ALSA card cleanup path.\n\nIf cobalt_alsa_init() fails after snd_cobalt_card_create(), the\nerr_exit_free path calls snd_card_free(sc) and then kfree(cobsc). That\nsecond free releases the same object again.\n\nRemove the explicit kfree(cobsc) and leave ownership with the ALSA card.\n\nThis issue was found by a static analysis checker and confirmed by\nmanual source review."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"75bbf45e3a954e292ae26832d2df40ca2e3ee452","versionType":"git"},{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"fe65028ee72a7e07e572b351891bd7a1f8917d33","versionType":"git"},{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"61dfa8ded5efc3a25d331fa9ce5cebb85531fe70","versionType":"git"},{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8","versionType":"git"},{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"6cbc8a73b3464ebeccc49987b7233b6b087b8504","versionType":"git"},{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"cb1218da234ea15fa14d90e2d049d686874d7aa3","versionType":"git"},{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"8c6610e230b9355cf7df5a338a0592c0f088c00b","versionType":"git"},{"version":"85756a069c55e0315ac5990806899cfb607b987f","status":"affected","lessThan":"3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/media/pci/cobalt/cobalt-alsa-main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.2","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","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/media/pci/cobalt/cobalt-alsa-main.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/75bbf45e3a954e292ae26832d2df40ca2e3ee452"},{"url":"https://git.kernel.org/stable/c/fe65028ee72a7e07e572b351891bd7a1f8917d33"},{"url":"https://git.kernel.org/stable/c/61dfa8ded5efc3a25d331fa9ce5cebb85531fe70"},{"url":"https://git.kernel.org/stable/c/42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8"},{"url":"https://git.kernel.org/stable/c/6cbc8a73b3464ebeccc49987b7233b6b087b8504"},{"url":"https://git.kernel.org/stable/c/cb1218da234ea15fa14d90e2d049d686874d7aa3"},{"url":"https://git.kernel.org/stable/c/8c6610e230b9355cf7df5a338a0592c0f088c00b"},{"url":"https://git.kernel.org/stable/c/3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:54:28.227Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.18.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"7.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}