7.8
HIGH
CVSS 3.1
CVE-2026-53192
ALSA: timer: Fix UAF at snd_timer_user_params()
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: timer: Fix UAF at snd_timer_user_params() At releasing a timer object, e.g. when a userspace timer (CONFIG_SND_UTIMER) gets closed and snd_timer_free() is called, it tries to detach the timer instances and release the resources. However, it's still possible that other in-flight tasks are holding the timer instance where the to-be-deleted timer object is associated, and this may lead to racy accesses. Fortunately, most of ioctls dealing with the timer instance list already have the protection with register_mutex, and this also avoids such races. But, SNDRV_TIMER_IOCTL_PARAMS isn't protected, hence the concurrent ioctl may lead to use-after-free. This patch just adds the guard with register_mutex to protect snd_timer_user_params() for covering the code path as a quick workaround. It's no hot-path but rather a rarely issued ioctl, so the performance penalty doesn't matter.
Details
INFO
Published Date :
June 25, 2026, 9:16 a.m.
Last Modified :
July 6, 2026, 12:37 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
Fixes a use-after-free vulnerability in ALSA timer by adding mutex protection.
- Apply the patch that adds register_mutex protection to snd_timer_user_params().
- Update the Linux kernel to a version where this fix is applied.
- Ensure timer objects are properly detached before freeing.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53192.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53192 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53192
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53192 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53192 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 06, 2026
Action Type Old Value New Value Added CWE CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.36 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.13 *cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.12 up to (excluding) 6.12.94 Added Reference Type kernel.org: https://git.kernel.org/stable/c/053a401b592be424fea9d57c789f66cd5d8cec11 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/306427adf9b97e29e5958cb9cf3096c6151fc9ff Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/38034d04d4a75bbca01df2b313ced0bcd0fa3242 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3d39da65b5c422c5e5afb7d5651b0698d060a827 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 29, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '92ad2d7f80cad43b046f093e808e11fe919d304a', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '117743d62e1225e208568a3ffc2c07214f1347cb', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'b2214914e461d0466548a52dfe4f4ee8ce362276', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'e2331730175f74169046d2af8db1b47243df7c7a', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '38034d04d4a75bbca01df2b313ced0bcd0fa3242', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '3d39da65b5c422c5e5afb7d5651b0698d060a827', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '306427adf9b97e29e5958cb9cf3096c6151fc9ff', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '053a401b592be424fea9d57c789f66cd5d8cec11', 'versionType': 'git'}, {'status': 'affected', 'version': '0', 'lessThan': '5.10.259', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '5.15.210', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.1.176', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.6.143', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.12.94', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.18.36', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '7.0.13', 'versionType': 'semver'}], 'programFiles': ['sound/core/timer.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'unaffected', 'version': '5.10.259', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.94', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['sound/core/timer.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '37745918e0e7575bc40f38da93a99b9fa6406224', 'lessThan': '38034d04d4a75bbca01df2b313ced0bcd0fa3242', 'versionType': 'git'}, {'status': 'affected', 'version': '37745918e0e7575bc40f38da93a99b9fa6406224', 'lessThan': '3d39da65b5c422c5e5afb7d5651b0698d060a827', 'versionType': 'git'}, {'status': 'affected', 'version': '37745918e0e7575bc40f38da93a99b9fa6406224', 'lessThan': '306427adf9b97e29e5958cb9cf3096c6151fc9ff', 'versionType': 'git'}, {'status': 'affected', 'version': '37745918e0e7575bc40f38da93a99b9fa6406224', 'lessThan': '053a401b592be424fea9d57c789f66cd5d8cec11', 'versionType': 'git'}], 'programFiles': ['sound/core/timer.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.12'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.12', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.94', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['sound/core/timer.c'], 'defaultStatus': 'affected'}] Removed Reference https://git.kernel.org/stable/c/117743d62e1225e208568a3ffc2c07214f1347cb Removed Reference https://git.kernel.org/stable/c/92ad2d7f80cad43b046f093e808e11fe919d304a Removed Reference https://git.kernel.org/stable/c/b2214914e461d0466548a52dfe4f4ee8ce362276 Removed Reference https://git.kernel.org/stable/c/e2331730175f74169046d2af8db1b47243df7c7a -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '92ad2d7f80cad43b046f093e808e11fe919d304a', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '117743d62e1225e208568a3ffc2c07214f1347cb', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'b2214914e461d0466548a52dfe4f4ee8ce362276', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': 'e2331730175f74169046d2af8db1b47243df7c7a', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '38034d04d4a75bbca01df2b313ced0bcd0fa3242', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '3d39da65b5c422c5e5afb7d5651b0698d060a827', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '306427adf9b97e29e5958cb9cf3096c6151fc9ff', 'versionType': 'git'}, {'status': 'affected', 'version': '1da177e4c3f41524e886b7f1b8a0c1fc7321cac2', 'lessThan': '053a401b592be424fea9d57c789f66cd5d8cec11', 'versionType': 'git'}, {'status': 'affected', 'version': '0', 'lessThan': '5.10.259', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '5.15.210', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.1.176', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.6.143', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.12.94', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '6.18.36', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '7.0.13', 'versionType': 'semver'}], 'programFiles': ['sound/core/timer.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'unaffected', 'version': '5.10.259', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.94', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['sound/core/timer.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: ALSA: timer: Fix UAF at snd_timer_user_params() At releasing a timer object, e.g. when a userspace timer (CONFIG_SND_UTIMER) gets closed and snd_timer_free() is called, it tries to detach the timer instances and release the resources. However, it's still possible that other in-flight tasks are holding the timer instance where the to-be-deleted timer object is associated, and this may lead to racy accesses. Fortunately, most of ioctls dealing with the timer instance list already have the protection with register_mutex, and this also avoids such races. But, SNDRV_TIMER_IOCTL_PARAMS isn't protected, hence the concurrent ioctl may lead to use-after-free. This patch just adds the guard with register_mutex to protect snd_timer_user_params() for covering the code path as a quick workaround. It's no hot-path but rather a rarely issued ioctl, so the performance penalty doesn't matter. Added Reference https://git.kernel.org/stable/c/053a401b592be424fea9d57c789f66cd5d8cec11 Added Reference https://git.kernel.org/stable/c/117743d62e1225e208568a3ffc2c07214f1347cb Added Reference https://git.kernel.org/stable/c/306427adf9b97e29e5958cb9cf3096c6151fc9ff Added Reference https://git.kernel.org/stable/c/38034d04d4a75bbca01df2b313ced0bcd0fa3242 Added Reference https://git.kernel.org/stable/c/3d39da65b5c422c5e5afb7d5651b0698d060a827 Added Reference https://git.kernel.org/stable/c/92ad2d7f80cad43b046f093e808e11fe919d304a Added Reference https://git.kernel.org/stable/c/b2214914e461d0466548a52dfe4f4ee8ce362276 Added Reference https://git.kernel.org/stable/c/e2331730175f74169046d2af8db1b47243df7c7a
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.