{"id":"CVE-2024-38605","summary":"ALSA: core: Fix NULL module pointer assignment at card init","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: core: Fix NULL module pointer assignment at card init\n\nThe commit 81033c6b584b (\"ALSA: core: Warn on empty module\")\nintroduced a WARN_ON() for a NULL module pointer passed at snd_card\nobject creation, and it also wraps the code around it with '#ifdef\nMODULE'.  This works in most cases, but the devils are always in\ndetails.  \"MODULE\" is defined when the target code (i.e. the sound\ncore) is built as a module; but this doesn't mean that the caller is\nalso built-in or not.  Namely, when only the sound core is built-in\n(CONFIG_SND=y) while the driver is a module (CONFIG_SND_USB_AUDIO=m),\nthe passed module pointer is ignored even if it's non-NULL, and\ncard-\u003emodule remains as NULL.  This would result in the missing module\nreference up/down at the device open/close, leading to a race with the\ncode execution after the module removal.\n\nFor addressing the bug, move the assignment of card-\u003emodule again out\nof ifdef.  The WARN_ON() is still wrapped with ifdef because the\nmodule can be really NULL when all sound drivers are built-in.\n\nNote that we keep 'ifdef MODULE' for WARN_ON(), otherwise it would\nlead to a false-positive NULL module check.  Admittedly it won't catch\nperfectly, i.e. no check is performed when CONFIG_SND=y.  But, it's no\nreal problem as it's only for debugging, and the condition is pretty\nrare.","modified":"2026-04-16T04:33:11.311525780Z","published":"2024-06-19T13:48:15.769Z","related":["SUSE-SU-2024:2372-1","SUSE-SU-2024:2394-1","SUSE-SU-2024:2571-1","SUSE-SU-2024:2896-1","SUSE-SU-2024:2939-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1","SUSE-SU-2025:20028-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/38xxx/CVE-2024-38605.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/39381fe7394e5eafac76e7e9367e7351138a29c1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6b8374ee2cabcf034faa34e69a855dc496a9ec12"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c935e72139e6d523defd60fe875c01eb1f9ea5c5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d7ff29a429b56f04783152ad7bbd7233b740e434"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e007476725730c1a68387b54b7629486d8a8301e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e644036a3e2b2c9b3eee3c61b5d31c2ca8b5ba92"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e7e0ca200772bdb2fdc6d43d32d341e87a36f811"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/38xxx/CVE-2024-38605.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-38605"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"81033c6b584b44514cbb16fffc26ca29a0fa6270"},{"fixed":"d7ff29a429b56f04783152ad7bbd7233b740e434"},{"fixed":"e7e0ca200772bdb2fdc6d43d32d341e87a36f811"},{"fixed":"e007476725730c1a68387b54b7629486d8a8301e"},{"fixed":"e644036a3e2b2c9b3eee3c61b5d31c2ca8b5ba92"},{"fixed":"c935e72139e6d523defd60fe875c01eb1f9ea5c5"},{"fixed":"6b8374ee2cabcf034faa34e69a855dc496a9ec12"},{"fixed":"39381fe7394e5eafac76e7e9367e7351138a29c1"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-38605.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}