#VU86813 Out-of-bounds read in Linux kernel - CVE-2024-26594

Vulnerability identifier: #VU86813

Vulnerability risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-26594

CWE-ID: CWE-125

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 gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when handling SMB2 Mech Tokens. A remote attacker can send specially crafted packets to ksmbd, trigger an out-of-bounds read error and read contents of memory 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/dd1de9268745f0eac83a430db7afc32cbd62e84b
https://git.kernel.org/stable/c/6eb8015492bcc84e40646390e50a862b2c0529c9
https://git.kernel.org/stable/c/a2b21ef1ea4cf632d19b3a7cc4d4245b8e63202a
https://git.kernel.org/stable/c/5e6dfec95833edc54c48605a98365a7325e5541e
https://git.kernel.org/stable/c/92e470163d96df8db6c4fa0f484e4a229edb903d
https://www.zerodayinitiative.com/advisories/ZDI-24-194/

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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.