Remote denial of service in Linux kernel TLS implementation

1) Race condition

EUVDB-ID: #VU89251

Risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-26585

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a race condition within the tls_encrypt_done() function in net/tls/tls_sw.c. A remote attacker user can send specially crafted requests to the system and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 6.6.18

External links

http://git.kernel.org/stable/c/e01e3934a1b2d122919f73bc6ddbe1cdafc4bbdb
http://git.kernel.org/stable/c/6db22d6c7a6dc914b12c0469b94eb639b6a8a146
http://git.kernel.org/stable/c/e327ed60bff4a991cd7a709c47c4f0c5b4a4fd57
http://git.kernel.org/stable/c/196f198ca6fce04ba6ce262f5a0e4d567d7d219d

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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