Reachable assertion in Linux kernel overlayfs

1) Reachable assertion

EUVDB-ID: #VU90908

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-2024-27069

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

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

The vulnerability exists due to reachable assertion within the ovl_verify_area() function in fs/overlayfs/copy_up.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.8 - 6.8.1

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.8:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.8:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.8:rc2:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.8:rc5:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.8.1:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/c3c85aefc0da1e5074a06c682542a54ccc99bdca
https://git.kernel.org/stable/c/77a28aa476873048024ad56daf8f4f17d58ee48e
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.8.2

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.