#VU86812 Use-after-free in Linux kernel - CVE-2024-26592

Vulnerability identifier: #VU86812

Vulnerability risk: Medium

CVSSv4.0: 5.2 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-26592

CWE-ID: CWE-416

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a race condition when handling TCP connect and disconnect events within the ksmbd_tcp_new_connection() function in ksmbd. A remote non-authenticated attacker can trigger a use-after-free error and crash the kernel or execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/380965e48e9c32ee4263c023e1d830ea7e462ed1
https://git.kernel.org/stable/c/24290ba94cd0136e417283b0dbf8fcdabcf62111
https://git.kernel.org/stable/c/69d54650b751532d1e1613a4fb433e591aeef126
https://git.kernel.org/stable/c/38d20c62903d669693a1869aa68c4dd5674e2544
https://git.kernel.org/stable/c/999daf367b924fdf14e9d83e034ee0f86bc17ec6
https://www.zerodayinitiative.com/advisories/ZDI-24-195/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.