#VU89267 Input validation error in Linux kernel - CVE-2024-26633

Vulnerability identifier: #VU89267

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-26633

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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

The vulnerability exists due to an error in NEXTHDR_FRAGMENT handling within the ip6_tnl_parse_tlv_enc_lim() function in net/ipv6/ip6_tunnel.c. A remote attacker can send specially crafted packets to the system and perform a denial of service (DoS) attack.

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/135414f300c5db995e2a2f3bf0f455de9d014aee
https://git.kernel.org/stable/c/3f15ba3dc14e6ee002ea01b4faddc3d49200377c
https://git.kernel.org/stable/c/da23bd709b46168f7dfc36055801011222b076cd
https://git.kernel.org/stable/c/4329426cf6b8e22b798db2331c7ef1dd2a9c748d
https://git.kernel.org/stable/c/62a1fedeb14c7ac0947ef33fadbabd35ed2400a2
https://git.kernel.org/stable/c/687c5d52fe53e602e76826dbd4d7af412747e183
https://git.kernel.org/stable/c/ba8d904c274268b18ef3dc11d3ca7b24a96cb087
https://git.kernel.org/stable/c/d375b98e0248980681e5e56b712026174d617198

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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 Internet.

Is there known malware, which exploits this vulnerability?

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