#VU97808 Improper locking in Linux kernel - CVE-2024-46840

Vulnerability identifier: #VU97808

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-2024-46840

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 reada_walk_down(), walk_down_proc(), do_walk_down() and walk_up_proc() functions in fs/btrfs/extent-tree.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/c847b28a799733b04574060ab9d00f215970627d
https://git.kernel.org/stable/c/71291aa7246645ef622621934d2067400380645e
https://git.kernel.org/stable/c/c60676b81fab456b672796830f6d8057058f029c
https://git.kernel.org/stable/c/728d4d045b628e006b48a448f3326a7194c88d32
https://git.kernel.org/stable/c/9cc887ac24b7a0598f4042ae9af6b9a33072f75b
https://git.kernel.org/stable/c/7d1df13bf078ffebfedd361d714ff6cee1ff01b9
https://git.kernel.org/stable/c/03804641ec2d0da4fa088ad21c88e703d151ce16
https://git.kernel.org/stable/c/b8ccef048354074a548f108e51d0557d6adfd3a3

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.