{"id":"CVE-2025-40085","state":"PUBLISHED","title":"ALSA: usb-audio: Fix NULL pointer deference in try_to_register_card","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Fix NULL pointer deference in try_to_register_card\n\nIn try_to_register_card(), the return value of usb_ifnum_to_if() is\npassed directly to usb_interface_claimed() without a NULL check, which\nwill lead to a NULL pointer dereference when creating an invalid\nUSB audio device. Fix this by adding a check to ensure the interface\npointer is valid before passing it to usb_interface_claimed().","publishedAt":"2025-10-29T13:37:04.707Z","updatedAt":"2026-05-23T16:01:24.342Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"28787ff9fbeaf57684eb64cc33e2ec8ceedf21b5","status":"affected","lessThan":"736159f7b296d7a95f7208eb4799639b1f8b16a0","versionType":"git"},{"version":"39efc9c8a973ddff5918191525d1679d0fb368ea","status":"affected","lessThan":"8d19a7ab28c7b9c207db5c5282afa8cc8595bcdb","versionType":"git"},{"version":"39efc9c8a973ddff5918191525d1679d0fb368ea","status":"affected","lessThan":"576312eb436326b44b7010f4d9ae2b698df075ea","versionType":"git"},{"version":"39efc9c8a973ddff5918191525d1679d0fb368ea","status":"affected","lessThan":"bba7208765d26e5e36b87f21dacc2780b064f41f","versionType":"git"},{"version":"39efc9c8a973ddff5918191525d1679d0fb368ea","status":"affected","lessThan":"8503ac1a62075a085402e42a386b5c627c821a51","versionType":"git"},{"version":"39efc9c8a973ddff5918191525d1679d0fb368ea","status":"affected","lessThan":"28412b489b088fb88dff488305fd4e56bd47f6e4","versionType":"git"},{"version":"9d4f4dc3cd38e412c29a7626489fe48b79ebbf6c","status":"affected","versionType":"git"},{"version":"52076a41c128146c9df4a157e972cb17019313b1","status":"affected","versionType":"git"},{"version":"5.15.75","status":"affected","lessThan":"5.15.196","versionType":"semver"},{"version":"5.19.17","status":"affected","lessThan":"5.20","versionType":"semver"},{"version":"6.0.3","status":"affected","lessThan":"6.1","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/card.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.1","versionType":"semver"},{"version":"5.15.196","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.158","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.114","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.55","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.5","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/card.c"]}],"references":["https://git.kernel.org/stable/c/736159f7b296d7a95f7208eb4799639b1f8b16a0","https://git.kernel.org/stable/c/8d19a7ab28c7b9c207db5c5282afa8cc8595bcdb","https://git.kernel.org/stable/c/576312eb436326b44b7010f4d9ae2b698df075ea","https://git.kernel.org/stable/c/bba7208765d26e5e36b87f21dacc2780b064f41f","https://git.kernel.org/stable/c/8503ac1a62075a085402e42a386b5c627c821a51","https://git.kernel.org/stable/c/28412b489b088fb88dff488305fd4e56bd47f6e4"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40085.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40085","state":"PUBLISHED","datePublished":"2025-10-29T13:37:04.707Z","dateUpdated":"2026-05-23T16:01:24.342Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.161Z"},"containers":{"cna":{"title":"ALSA: usb-audio: Fix NULL pointer deference in try_to_register_card","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Fix NULL pointer deference in try_to_register_card\n\nIn try_to_register_card(), the return value of usb_ifnum_to_if() is\npassed directly to usb_interface_claimed() without a NULL check, which\nwill lead to a NULL pointer dereference when creating an invalid\nUSB audio device. Fix this by adding a check to ensure the interface\npointer is valid before passing it to usb_interface_claimed()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"28787ff9fbeaf57684eb64cc33e2ec8ceedf21b5","status":"affected","lessThan":"736159f7b296d7a95f7208eb4799639b1f8b16a0","versionType":"git"},{"version":"39efc9c8a973ddff5918191525d1679d0fb368ea","status":"affected","lessThan":"8d19a7ab28c7b9c207db5c5282afa8cc8595bcdb","versionType":"git"},{"version":"39efc9c8a973ddff5918191525d1679d0fb368ea","status":"affected","lessThan":"576312eb436326b44b7010f4d9ae2b698df075ea","versionType":"git"},{"version":"39efc9c8a973ddff5918191525d1679d0fb368ea","status":"affected","lessThan":"bba7208765d26e5e36b87f21dacc2780b064f41f","versionType":"git"},{"version":"39efc9c8a973ddff5918191525d1679d0fb368ea","status":"affected","lessThan":"8503ac1a62075a085402e42a386b5c627c821a51","versionType":"git"},{"version":"39efc9c8a973ddff5918191525d1679d0fb368ea","status":"affected","lessThan":"28412b489b088fb88dff488305fd4e56bd47f6e4","versionType":"git"},{"version":"9d4f4dc3cd38e412c29a7626489fe48b79ebbf6c","status":"affected","versionType":"git"},{"version":"52076a41c128146c9df4a157e972cb17019313b1","status":"affected","versionType":"git"},{"version":"5.15.75","status":"affected","lessThan":"5.15.196","versionType":"semver"},{"version":"5.19.17","status":"affected","lessThan":"5.20","versionType":"semver"},{"version":"6.0.3","status":"affected","lessThan":"6.1","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/card.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.1","versionType":"semver"},{"version":"5.15.196","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.158","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.114","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.55","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.5","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/card.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/736159f7b296d7a95f7208eb4799639b1f8b16a0"},{"url":"https://git.kernel.org/stable/c/8d19a7ab28c7b9c207db5c5282afa8cc8595bcdb"},{"url":"https://git.kernel.org/stable/c/576312eb436326b44b7010f4d9ae2b698df075ea"},{"url":"https://git.kernel.org/stable/c/bba7208765d26e5e36b87f21dacc2780b064f41f"},{"url":"https://git.kernel.org/stable/c/8503ac1a62075a085402e42a386b5c627c821a51"},{"url":"https://git.kernel.org/stable/c/28412b489b088fb88dff488305fd4e56bd47f6e4"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T16:01:24.342Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.75","versionEndExcluding":"5.15.196"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.1.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.6.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.12.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.17.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.18"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19.17"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}