#VU90766 Improper locking in Linux kernel - CVE-2024-27080

Vulnerability identifier: #VU90766

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-2024-27080

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 try_release_extent_state(), flush_fiemap_cache(), emit_fiemap_extent(), fiemap_search_slot(), fiemap_process_hole(), extent_fiemap(), i_size_read() and unlock_extent() functions in fs/btrfs/extent_io.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/49d640d2946c35a17b051d54171a032dd95b0f50
https://git.kernel.org/stable/c/ced63fffd63072c0ca55d5a451010d71bf08c0b3
https://git.kernel.org/stable/c/978b63f7464abcfd364a6c95f734282c50f3decf

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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.