Use-after-free in Linux kernel f2fs

1) Use-after-free

EUVDB-ID: #VU96549

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-44941

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the do_read_inode() function in fs/f2fs/inode.c, within the sanity_check_extent_cache() and f2fs_init_read_extent_tree() functions in fs/f2fs/extent_cache.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/263df78166d3a9609b97d28c34029bd01874cbb8
http://git.kernel.org/stable/c/323ef20b5558b9d9fd10c1224327af6f11a8177d
http://git.kernel.org/stable/c/d7409b05a64f212735f0d33f5f1602051a886eab

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.