CVE-2021-47116

MEDIUM

Linux Kernel < 5.10.43 - Use-After-Free in ext4_mb_init_backend

Title source: llm

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: fix memory leak in ext4_mb_init_backend on error path. Fix a memory leak discovered by syzbot when a file system is corrupted with an illegally large s_log_groups_per_flex.

References (3)

Core 3

Core References

Patch

https://git.kernel.org/stable/c/2050c6e5b161e5e25ce3c420fef58b24fa388a49

Patch

https://git.kernel.org/stable/c/04fb2baa0b147f51db065a1b13a11954abe592d0

Patch

https://git.kernel.org/stable/c/a8867f4e3809050571c98de7a2d465aff5e4daf5

Scores

CVSS v3 5.5

EPSS 0.0023

EPSS Percentile 14.1%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-401

Status published

Products (13)

Linux/Linux < 5.12

Linux/Linux 5.10.27 - 5.10.43

Linux/Linux 5.10.43 - 5.10.*

Linux/Linux 5.11.11 - 5.12

Linux/Linux 5.12

Linux/Linux 5.12.10 - 5.12.*

Linux/Linux 5.13

Linux/Linux 9e7af67e9521fb5cbb5b01aca22921c313c2e48e

Linux/Linux df61d3cff422433527d3bc388f69484f0781d226 - 2050c6e5b161e5e25ce3c420fef58b24fa388a49

Linux/Linux f91436d55a279f045987e8b8c1385585dca54be9 - 04fb2baa0b147f51db065a1b13a11954abe592d0

... and 3 more

Published Mar 15, 2024

Tracked Since Feb 18, 2026