Vulnerability Details : CVE-2023-0266

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
Vulnerability category: Memory Corruption
Published 2023-01-30 14:15:11
Updated 2023-08-29 17:59:38
Source Google Inc.
View at NVD,   CVE.org
CVE-2023-0266 is in the CISA Known Exploited Vulnerabilities Catalog
CISA vulnerability name:
Linux Kernel Use-After-Free Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
Linux kernel contains a use-after-free vulnerability that allows for privilege escalation to gain ring0 access from the system user.
Notes:
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
Added on 2023-03-30 Action due date 2023-04-20

Exploit prediction scoring system (EPSS) score for CVE-2023-0266

Probability of exploitation activity in the next 30 days: 0.08%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 34 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2023-0266

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Source
7.9
 HIGH CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:H
1.3
6.0
 cve-coordination@google.com
7.8
 HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1.8
5.9
 nvd@nist.gov

CWE ids for CVE-2023-0266

  • Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
    Assigned by:
    • cve-coordination@google.com (Secondary)
    • nvd@nist.gov (Primary)

References for CVE-2023-0266

Products affected by CVE-2023-0266

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