{"id":"CVE-2026-53192","title":"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","summary":"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…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","published":"2026-06-25","updated":"2026-06-29","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53192","references":[{"url":"https://git.kernel.org/stable/c/053a401b592be424fea9d57c789f66cd5d8cec11","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/306427adf9b97e29e5958cb9cf3096c6151fc9ff","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/38034d04d4a75bbca01df2b313ced0bcd0fa3242","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3d39da65b5c422c5e5afb7d5651b0698d060a827","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53192.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-53192"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2492792"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53192"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53192"},{"url":"https://lore.kernel.org/linux-cve-announce/2026062558-CVE-2026-53192-5b6e@gregkh/T"},{"url":"https://access.redhat.com/errata/RHSA-2026:68507"},{"url":"https://access.redhat.com/errata/RHSA-2026:68570"},{"url":"https://access.redhat.com/errata/RHSA-2026:68531"},{"url":"https://access.redhat.com/errata/RHSA-2026:68532"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00125,"epssPercentile":0.02543,"ingestedAt":"2026-06-29T13:42:12.001Z","vendor":"Red Hat","product":"Red Hat Enterprise Linux BaseOS (v. 10)","affected":["enterprise_linux 7","enterprise_linux 9","enterprise_linux_appstream_v_10","enterprise_linux_appstream_v_9","enterprise_linux_baseos_v_10","enterprise_linux_baseos_v_8","enterprise_linux_baseos_v_9","enterprise_linux_codeready_linux_builder_v_10","enterprise_linux_crb_v_8","enterprise_linux_codeready_linux_builder_v_9","enterprise_linux_real_time_for_nfv_v_10","enterprise_linux_nfv_v_8","enterprise_linux_real_time_for_nfv_v_9","enterprise_linux_real_time_v_10","enterprise_linux_rt_v_8","enterprise_linux_real_time_v_9"],"patched":["enterprise_linux_appstream_v_10","enterprise_linux_appstream_v_9","enterprise_linux_baseos_v_10","enterprise_linux_baseos_v_8","enterprise_linux_baseos_v_9","enterprise_linux_codeready_linux_builder_v_10","enterprise_linux_crb_v_8","enterprise_linux_codeready_linux_builder_v_9","enterprise_linux_real_time_for_nfv_v_10","enterprise_linux_nfv_v_8","enterprise_linux_real_time_for_nfv_v_9","enterprise_linux_real_time_v_10","enterprise_linux_rt_v_8","enterprise_linux_real_time_v_9"],"cwe":["CWE-364"],"scores":{"nvd":7.8,"vendor":7},"slug":"CVE-2026-53192","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:68507** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), Red Hat Enterprise Linux Real Time (v. 10) · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68507)\n- **RHSA-2026:68570** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9), Red Hat Enterprise Linux Real Time (v. 9) · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68570)\n- **RHSA-2026:68531** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68531)\n- **RHSA-2026:68532** · Red Hat · fixed in: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8) · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68532)\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9 · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53192.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}