CVE-2024-26601

2024-02-2600:00:00

ubuntu.com

linux kernel

ext4

vulnerability

cve-2024-26601

buddy bitmap

block freeing

fast commit replay

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

6.7 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

JSON

In the Linux kernel, the following vulnerability has been resolved: ext4:
regenerate buddy after block freeing failed if under fc replay This mostly
reverts commit 6bd97bf273bd (“ext4: remove redundant
mb_regenerate_buddy()”) and reintroduces mb_regenerate_buddy(). Based on
code in mb_free_blocks(), fast commit replay can end up marking as free
blocks that are already marked as such. This causes corruption of the buddy
bitmap so we need to regenerate it in that case.

OSVersionArchitecturePackageVersionFilename
ubuntu22.04noarchlinux< 5.15.0-112.122UNKNOWN
ubuntu23.10noarchlinux< anyUNKNOWN
ubuntu24.04noarchlinux< 6.8.0-7.7UNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1063.69UNKNOWN
ubuntu23.10noarchlinux-aws< anyUNKNOWN
ubuntu24.04noarchlinux-aws< anyUNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1063.69~20.04.1UNKNOWN
ubuntu22.04noarchlinux-aws-6.5< anyUNKNOWN
ubuntu22.04noarchlinux-azure< 5.15.0-1066.75UNKNOWN
ubuntu23.10noarchlinux-azure< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	22.04	noarch	linux	< 5.15.0-112.122	UNKNOWN
ubuntu	23.10	noarch	linux	< any	UNKNOWN
ubuntu	24.04	noarch	linux	< 6.8.0-7.7	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1063.69	UNKNOWN
ubuntu	23.10	noarch	linux-aws	< any	UNKNOWN
ubuntu	24.04	noarch	linux-aws	< any	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1063.69~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-aws-6.5	< any	UNKNOWN
ubuntu	22.04	noarch	linux-azure	< 5.15.0-1066.75	UNKNOWN
ubuntu	23.10	noarch	linux-azure	< any	UNKNOWN