Remote denial of service in Linux kernel TLS implementation

1) Race condition

EUVDB-ID: #VU87596

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-26583

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 between async notify and socket close in TLS implementation in net/tls/tls_sw.c. A remote attacker can send specially crafted traffic to the system, trigger a race condition and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/aec7961916f3f9e88766e2688992da6980f11b8d
http://git.kernel.org/stable/c/7a3ca06d04d589deec81f56229a9a9d62352ce01
http://git.kernel.org/stable/c/86dc27ee36f558fe223dbdfbfcb6856247356f4a
http://git.kernel.org/stable/c/6209319b2efdd8524691187ee99c40637558fa33

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.