#VU102480 Use-after-free in Linux kernel - CVE-2024-56786

Vulnerability identifier: #VU102480

Vulnerability 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-2024-56786

CWE-ID: CWE-416

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 escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the bpf_link_inc() and bpf_link_free() functions in kernel/bpf/syscall.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/2fcb921c2799c49ac5e365cf4110f94a64ae4885
https://git.kernel.org/stable/c/5fe23c57abadfd46a7a66e81f3536e4757252a0b
https://git.kernel.org/stable/c/f44ec8733a8469143fde1984b5e6931b2e2f6f3f

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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.