#VU91203 Buffer overflow in Linux kernel - CVE-2024-26718

Vulnerability identifier: #VU91203

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-2024-26718

CWE-ID: CWE-119

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 memory corruption within the verity_work() and verity_end_io() functions in drivers/md/dm-verity-target.c, within the crypt_io_init(), crypt_inc_pending(), crypt_dec_pending(), kcryptd_crypt() and kcryptd_queue_crypt() functions in drivers/md/dm-crypt.c. A local user can escalate privileges on the system.

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/30884a44e0cedc3dfda8c22432f3ba4078ec2d94
https://git.kernel.org/stable/c/5735a2671ffb70ea29ca83969fe01316ee2ed6fc
https://git.kernel.org/stable/c/0c45a20cbe68bc4d681734f5c03891124a274257
https://git.kernel.org/stable/c/0a9bab391e336489169b95cb0d4553d921302189

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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.