SB2024050860 - Denial of service in Linux kernel ip6_tunnel

Description

This security bulletin contains information about 1 security vulnerability.

1) Input validation error (CVE-ID: CVE-2024-26633)

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.

Remediation

Install update from vendor's website.

References

• 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
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.306
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.209
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.148
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.268
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.75
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.14
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.7.2
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.8