Use-after-free in Linux kernel mptcp

1) Use-after-free

EUVDB-ID: #VU96834

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-2024-44974

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 lookup_subflow_by_daddr(), select_local_address(), select_signal_address(), __lookup_addr() and mptcp_pm_create_subflow_or_signal_addr() functions in net/mptcp/pm_netlink.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/9a9afbbc3fbfca4975eea4aa5b18556db5a0c0b8
http://git.kernel.org/stable/c/0201d65d9806d287a00e0ba96f0321835631f63f
http://git.kernel.org/stable/c/48e50dcbcbaaf713d82bf2da5c16aeced94ad07d

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.