{"id":"CVE-2026-53192","revision":"c30c4340dfa246178129c64348095868","records":[{"revision":"c30c4340dfa246178129c64348095868","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53192","aliases":[],"title":"ALSA: timer: Fix UAF at snd_timer_user_params()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: timer: Fix UAF at snd_timer_user_params()\n\nAt releasing a timer object, e.g. when a userspace timer\n(CONFIG_SND_UTIMER) gets closed and snd_timer_free() is called, it\ntries to detach the timer instances and release the resources.\nHowever, it's still possible that other in-flight tasks are holding\nthe timer instance where the to-be-deleted timer object is associated,\nand this may lead to racy accesses.\n\nFortunately, most of ioctls dealing with the timer instance list\nalready have the protection with register_mutex, and this also avoids\nsuch races.  But, SNDRV_TIMER_IOCTL_PARAMS isn't protected, hence the\nconcurrent ioctl may lead to use-after-free.\n\nThis patch just adds the guard with register_mutex to protect\nsnd_timer_user_params() for covering the code path as a quick\nworkaround.  It's no hot-path but rather a rarely issued ioctl, so the\nperformance penalty doesn't matter.","state":0,"publishedAt":"2026-06-25T08:39:03.696+00:00","modifiedAt":"2026-10-19T19:57:27.788+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"sound/core/timer.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"37745918e0e7575bc40f38da93a99b9fa6406224\",\n                            \"lessThan\": \"38034d04d4a75bbca01df2b313ced0bcd0fa3242\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"37745918e0e7575bc40f38da93a99b9fa6406224\",\n                            \"lessThan\": \"3d39da65b5c422c5e5afb7d5651b0698d060a827\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"37745918e0e7575bc40f38da93a99b9fa6406224\",\n                            \"lessThan\": \"306427adf9b97e29e5958cb9cf3096c6151fc9ff\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"37745918e0e7575bc40f38da93a99b9fa6406224\",\n                            \"lessThan\": \"053a401b592be424fea9d57c789f66cd5d8cec11\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"sound/core/timer.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.12\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.12\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.94\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.36\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.13\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/38034d04d4a75bbca01df2b313ced0bcd0fa3242","https://git.kernel.org/stable/c/3d39da65b5c422c5e5afb7d5651b0698d060a827","https://git.kernel.org/stable/c/306427adf9b97e29e5958cb9cf3096c6151fc9ff","https://git.kernel.org/stable/c/053a401b592be424fea9d57c789f66cd5d8cec11"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53192","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53192","identifiers":["CVE-2026-53192"]},"retained":false,"historicalAffected":[]}],"coverage":[]}