PT-2023-1003 · Linux+10 · Linux Kernel+10
Clement Lecigne
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Published
2023-01-13
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Updated
2025-09-15
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CVE-2023-0266
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux Kernel (affected versions not specified)
Description
A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel. The issue is related to missing locks in
SNDRV CTL IOCTL ELEM {READ|WRITE}32 that can be used in a use-after-free, resulting in a privilege escalation to gain ring0 access from the system user. The vulnerability can be exploited to cause a denial of service and gain unauthorized access to protected information. It has been found exploited in the wild, affecting Linux systems.Recommendations
To resolve the issue, upgrade past commit 56b88b50565cd8b946a2d00b0c83927b7ebb055e. As a temporary workaround, consider restricting access to the vulnerable
SNDRV CTL IOCTL ELEM {READ|WRITE}32 API endpoint to minimize the risk of exploitation.Exploit
Fix
DoS
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linux Kernel
Linuxmint
Red Hat
Red Os
Rocky Linux
Suse
Ubuntu