{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53854","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-09T01:27:17.828Z","datePublished":"2025-12-09T01:30:19.746Z","dateUpdated":"2026-05-11T19:52:48.131Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:52:48.131Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: mediatek: mt8186: Fix use-after-free in driver remove path\n\nWhen devm runs function in the \"remove\" path for a device it runs them\nin the reverse order. That means that if you have parts of your driver\nthat aren't using devm or are using \"roll your own\" devm w/\ndevm_add_action_or_reset() you need to keep that in mind.\n\nThe mt8186 audio driver didn't quite get this right. Specifically, in\nmt8186_init_clock() it called mt8186_audsys_clk_register() and then\nwent on to call a bunch of other devm function. The caller of\nmt8186_init_clock() used devm_add_action_or_reset() to call\nmt8186_deinit_clock() but, because of the intervening devm functions,\nthe order was wrong.\n\nSpecifically at probe time, the order was:\n1. mt8186_audsys_clk_register()\n2. afe_priv->clk = devm_kcalloc(...)\n3. afe_priv->clk[i] = devm_clk_get(...)\n\nAt remove time, the order (which should have been 3, 2, 1) was:\n1. mt8186_audsys_clk_unregister()\n3. Free all of afe_priv->clk[i]\n2. Free afe_priv->clk\n\nThe above seemed to be causing a use-after-free. Luckily, it's easy to\nfix this by simply using devm more correctly. Let's move the\ndevm_add_action_or_reset() to the right place. In addition to fixing\nthe use-after-free, code inspection shows that this fixes a leak\n(missing call to mt8186_audsys_clk_unregister()) that would have\nhappened if any of the syscon_regmap_lookup_by_phandle() calls in\nmt8186_init_clock() had failed."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/soc/mediatek/mt8186/mt8186-afe-clk.c","sound/soc/mediatek/mt8186/mt8186-afe-clk.h","sound/soc/mediatek/mt8186/mt8186-afe-pcm.c","sound/soc/mediatek/mt8186/mt8186-audsys-clk.c","sound/soc/mediatek/mt8186/mt8186-audsys-clk.h"],"versions":[{"version":"55b423d5623ccd6785429431c2cf5f3e073b73ba","lessThan":"3e56a1c04882852e3e7d6c59756a16211ebbc457","status":"affected","versionType":"git"},{"version":"55b423d5623ccd6785429431c2cf5f3e073b73ba","lessThan":"dffd9e2b57cb845930fa885aa634a847ba2130dd","status":"affected","versionType":"git"},{"version":"55b423d5623ccd6785429431c2cf5f3e073b73ba","lessThan":"a93d2afd3f77a7331271a0f25c6a11003db69b3c","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/soc/mediatek/mt8186/mt8186-afe-clk.c","sound/soc/mediatek/mt8186/mt8186-afe-clk.h","sound/soc/mediatek/mt8186/mt8186-afe-pcm.c","sound/soc/mediatek/mt8186/mt8186-audsys-clk.c","sound/soc/mediatek/mt8186/mt8186-audsys-clk.h"],"versions":[{"version":"6.0","status":"affected"},{"version":"0","lessThan":"6.0","status":"unaffected","versionType":"semver"},{"version":"6.1.30","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.3.4","lessThanOrEqual":"6.3.*","status":"unaffected","versionType":"semver"},{"version":"6.4","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":"6.0","versionEndExcluding":"6.1.30"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.3.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.4"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/3e56a1c04882852e3e7d6c59756a16211ebbc457"},{"url":"https://git.kernel.org/stable/c/dffd9e2b57cb845930fa885aa634a847ba2130dd"},{"url":"https://git.kernel.org/stable/c/a93d2afd3f77a7331271a0f25c6a11003db69b3c"}],"title":"ASoC: mediatek: mt8186: Fix use-after-free in driver remove path","x_generator":{"engine":"bippy-1.2.0"}}}}