#VU102027 Use-after-free in Linux kernel - CVE-2024-56640

Vulnerability identifier: #VU102027

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-2024-56640

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 smc_listen_out() and smc_listen_work() functions in net/smc/af_smc.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/0cf598548a6c36d90681d53c6b77d52363f2f295
https://git.kernel.org/stable/c/2c7f14ed9c19ec0f149479d1c2842ec1f9bf76d7
https://git.kernel.org/stable/c/673d606683ac70bc074ca6676b938bff18635226
https://git.kernel.org/stable/c/6f0ae06a234a78ae137064f2c89135ac078a00eb
https://git.kernel.org/stable/c/f502a88fdd415647a1f2dc45fac71b9c522a052b

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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.