#VU90789 Improper locking in Linux kernel - CVE-2024-26740

Vulnerability identifier: #VU90789

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-26740

CWE-ID: CWE-667

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 perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the mirred_egress_to_ingress_tcp_test() function in tools/testing/selftests/net/forwarding/tc_actions.sh, within the is_mirred_nested() and tcf_mirred_to_dev() functions in net/sched/act_mirred.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
http://git.kernel.org/stable/c/7c787888d164689da8b1b115f3ef562c1e843af4
http://git.kernel.org/stable/c/60ddea1600bc476e0f5e02bce0e29a460ccbf0be
http://git.kernel.org/stable/c/52f671db18823089a02f07efc04efdb2272ddc17

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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.