PT-2024-11168 · Linux · Linux Kernel

Syzbot · Published 2021-05-20 · Updated 2025-01-07 · CVE-2021-47116

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A memory leak has been discovered in the Linux kernel, specifically in the ext4 file system. The issue occurs when a file system is corrupted with an illegally large s log groups per flex, causing a memory leak in the ext4 mb init backend function on the error path. This was discovered by syzbot.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

BDU:2025-07270

CVE-2021-47116

Affected Products

Linux Kernel

References · 19

• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47116 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47116 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47116 · Vendor Advisory
• https://git.kernel.org/stable/c/2050c6e5b161e5e25ce3c420fef58b24fa388a49 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-47116 · Security Note
• https://bdu.fstec.ru/vul/2025-07270 · Security Note
• https://git.kernel.org/stable/c/a8867f4e3809050571c98de7a2d465aff5e4daf5 · Patch
• https://osv.dev/vulnerability/CVE-2021-47116 · Vendor Advisory
• https://git.kernel.org/stable/c/04fb2baa0b147f51db065a1b13a11954abe592d0 · Patch
• https://cve.org/CVERecord?id=CVE-2021-47116 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-47116 · Vendor Advisory
• https://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commit/?h=v5.10.176-lvc1&id=2050c6e5b161e5e25ce3c420fef58b24fa388a49 · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.43 · Note
• https://twitter.com/CVEnew/status/1768738346304721061 · Twitter Post
• https://git.linuxtesting.ru/pub/scm/linux/kernel/git/lvc/linux-stable.git/commit/?h=v5.10.176-lvc1&id=2050c6e5b161e5e25ce3c420fef58b24fa388a49 · Note