#VU90791 Improper locking in Linux kernel - CVE-2024-26726

Vulnerability identifier: #VU90791

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-26726

CWE-ID: CWE-667

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the clear_extent_uptodate() function in fs/btrfs/inode.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.1 - 6.1.78, 6.6 - 6.6.17, 6.7 - 6.7.5, 6.8 rc1 - 6.8 rc5

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External links
https://git.kernel.org/stable/c/02f2b95b00bf57d20320ee168b30fb7f3db8e555
https://git.kernel.org/stable/c/7bddf18f474f166c19f91b2baf67bf7c5eda03f7
https://git.kernel.org/stable/c/a4b7741c8302e28073bfc6dd1c2e73598e5e535e
https://git.kernel.org/stable/c/5571e41ec6e56e35f34ae9f5b3a335ef510e0ade
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.79
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.18
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.7.6
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.8

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?