Use-after-free in Linux kernel riscv mm

1) Use-after-free

EUVDB-ID: #VU94222

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-2024-40915

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 set_direct_map_default_noflush() function in arch/riscv/mm/pageattr.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/919f8626099d9909b9a9620b05e8c8ab06581876
http://git.kernel.org/stable/c/8661a7af04991201640863ad1a0983173f84b5eb
http://git.kernel.org/stable/c/d5257ceb19d92069195254866421f425aea42915
http://git.kernel.org/stable/c/fb1cf0878328fe75d47f0aed0a65b30126fcefc4

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.