Use-after-free in Linux kernel nfsd

1) Use-after-free

EUVDB-ID: #VU99804

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-2024-50121

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 nfs4_state_shutdown_net() function in fs/nfsd/nfs4state.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

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

http://git.kernel.org/stable/c/f965dc0f099a54fca100acf6909abe52d0c85328
http://git.kernel.org/stable/c/add1df5eba163a3a6ece11cb85890e2e410baaea
http://git.kernel.org/stable/c/d5ff2fb2e7167e9483846e34148e60c0c016a1f6

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.