#VU78264 Use-after-free in Linux kernel - CVE-2023-35829

Vulnerability identifier: #VU78264

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-2023-35829

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 rkvdec_remove() function in drivers/staging/media/rkvdec/rkvdec.c. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 6.3.2, 6.3.2

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External links
https://lore.kernel.org/lkml/20230307173900.1299387-1-zyytlz.wz@163.com/T/
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3228cec23b8b29215e18090c6ba635840190993d
https://lore.kernel.org/all/a4dafa22-3ee3-dbe1-fd50-fee07883ce1a@xs4all.nl/
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.2

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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.