7.9

CVE-2023-0266

Warning

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

Data is provided by the National Vulnerability Database (NVD)
Debian ≫ Debian Linux Version10.0
Linux ≫ Linux Kernel Version >= 4.14 < 4.14.303
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.270
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.229
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.163
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.88
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.6

30.03.2023: CISA Known Exploited Vulnerabilities (KEV) Catalog

Linux Kernel Use-After-Free Vulnerability

Vulnerability

Linux kernel contains a use-after-free vulnerability that allows for privilege escalation to gain ring0 access from the system user.

Description

Apply updates per vendor instructions.

Required actions
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.03% 0.084
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 7 1 5.9
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
cve-coordination@google.com 7.9 1.3 6
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.