CVE-2023-0266
Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel
CVSS Score
7.9
EPSS Score
0.0%
EPSS Percentile
0th
A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel. SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be used in a use-after-free that can result in a priviledge escalation to gain ring0 access from the system user. We recommend upgrading past commit 56b88b50565cd8b946a2d00b0c83927b7ebb055e
| CWE | CWE-416 |
| Vendor | linux |
| Product | linux kernel |
| Ecosystems | |
| Industries | Technology |
| Published | Jan 30, 2023 |
| Last Updated | Oct 21, 2025 |
⚠️ Actively Exploited — Act Now
Get instant alerts for linux linux kernel
This vulnerability is actively exploited in the wild. Set up free real-time alerts so you're first to know about threats like CVE-2023-0266.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:H Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
High
Availability
High
Affected Versions
Linux / Linux Kernel
4.14 < 56b88b50565cd8b946a2d00b0c83927b7ebb055e
References
github.com: https://github.com/torvalds/linux/commit/becf9e5d553c2389d857a3c178ce80fdb34a02e1 git.kernel.org: https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-5.10/alsa-pcm-move-rwsem-lock-inside-snd_ctl_elem_read-to-prevent-uaf.patch?id=72783cf35e6c55bca84c4bb7b776c58152856fd4 github.com: https://github.com/torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e lists.debian.org: https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html cisa.gov: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-0266