Privilege escalation in Linux kernel netfilter nf_tables

1) Race condition

EUVDB-ID: #VU88135

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-26643

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a race condition within the nf_tables_unbind_set() function in net/netfilter/nf_tables_api.c. A local user can exploit the race and escalate privileges on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/552705a3650bbf46a22b1adedc1b04181490fc36
http://git.kernel.org/stable/c/406b0241d0eb598a0b330ab20ae325537d8d8163
http://git.kernel.org/stable/c/b2d6f9a5b1cf968f1eaa71085ceeb09c2cb276b1
http://git.kernel.org/stable/c/5224afbc30c3ca9ba23e752f0f138729b2c48dd8

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.