#VU88543 Buffer overflow in Linux kernel - CVE-2024-26811

Vulnerability identifier: #VU88543

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-2024-26811

CWE-ID: CWE-119

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 boundary error when installing malicious ksmbd-tools. A local user can force the ksmbd.mountd to return invalid ipc response to ksmbd kernel server,  trigger memory corruption and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

---

External links
https://git.kernel.org/stable/c/a677ebd8ca2f2632ccdecbad7b87641274e15aac
https://git.kernel.org/stable/c/51a6c2af9d20203ddeeaf73314ba8854b38d01bd
https://git.kernel.org/stable/c/a637fabac554270a851033f5ab402ecb90bc479c
https://git.kernel.org/stable/c/76af689a45aa44714b46d1a7de4ffdf851ded896
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RO3RO34MLQ6WT3A7O6STQUVXW43N6W3K/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LG6L4FXO4WNWUM6W7USOH2YTRVWREM3V/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6XCNJZBDMGJXRIKLGKM4RRJU4XCHPX62/

---

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.