CVE-2021-45469

Publication date 23 December 2021

Last updated 27 August 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.8 · High

Score breakdown

Description

In __f2fs_setxattr in fs/f2fs/xattr.c in the Linux kernel through 5.15.11, there is an out-of-bounds memory access when an inode has an invalid last xattr entry.

From the Ubuntu Security Team

Wenqing Liu discovered that the f2fs file system in the Linux kernel did not properly validate the last xattr entry in an inode. An attacker could use this to construct a malicious f2fs image that, when mounted and operated on, could cause a denial of service (system crash) or possibly execute arbitrary code.

Status

Package Ubuntu Release Status
linux-gke 26.04 LTS resolute
Not affected
25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble
Not affected
23.10 mantic Not in release
23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy
Not affected
21.10 impish Not in release
21.04 hirsute Not in release
20.04 LTS focal
Fixed 5.4.0-1066.69
18.04 LTS bionic Not in release
16.04 LTS xenial Ignored end of standard support
14.04 LTS trusty Not in release
linux-xilinx 26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky
Not affected
24.04 LTS noble
Not affected
22.04 LTS jammy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-nvidia-bos 26.04 LTS resolute