Out-of-bounds read in Linux kernel smb server

1) Out-of-bounds read

EUVDB-ID: #VU102081

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-2024-56626

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to an out-of-bounds read error within the smb2_write() function in fs/smb/server/smb2pdu.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.12 - 6.12.4

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.12:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.12.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.12.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.12.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.12.4:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/164d3597d26d9acff5d5b8bc3208bdcca942dd6a
https://git.kernel.org/stable/c/313dab082289e460391c82d855430ec8a28ddf81
https://git.kernel.org/stable/c/8cd7490fc0f268883e86e840cda5311257af69ca
https://git.kernel.org/stable/c/c5797f195c67132d061d29c57a7c6d30530686f0
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.5

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.