#VU90182 Use-after-free in Linux kernel - CVE-2024-26944

Vulnerability identifier: #VU90182

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-26944

CWE-ID: CWE-416

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 escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the btrfs_load_block_group_zone_info(), bitmap_free() and do_zone_finish() functions in fs/btrfs/zoned.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.8, 6.8 rc1, 6.8 rc2, 6.8 rc5, 6.8.1, 6.8.2

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External links
https://git.kernel.org/stable/c/34ca809e055eca5cfe63d9c7efbf80b7c21b4e57
https://git.kernel.org/stable/c/1ec17ef59168a1a6f1105f5dc517f783839a5302
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.8.3

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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.