Linux Kernel up to 5.17.3 ip6_forward denial of service

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 4.19.238/5.4.189/5.10.111/5.15.34/5.17.3. Affected by this issue is the function ip6_forward. Such manipulation leads to denial of service. This vulnerability is referenced as CVE-2022-49048. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 4.19.238/5.4.189/5.10.111/5.15.34/5.17.3 and classified as critical. Affected by this issue is the function ip6_forward. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix panic when forwarding a pkt with no in6 dev kongweibin reported a kernel panic in ip6_forward() when input interface has no in6 dev associated. The following tc commands were used to reproduce this panic: tc qdisc del dev vxlan100 root tc qdisc add dev vxlan100 root netem corrupt 5%

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2022-49048 since 02/26/2025. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 271309 (EulerOS 2.0 SP13 : kernel (EulerOS-SA-2025-2264)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.19.239, 5.4.190, 5.10.112, 5.15.35 or 5.17.4 eliminates this vulnerability. Applying the patch 74b68f5249f16c5f7f675d0f604fa6ae20e3a151/ab2f5afb7af5c68389e8c7dd29e0a98fbeaaa435/a263712ba8c9ded25dd9d2d5ced11bcea5b33a3e/adee01bbf6cb5b3e4ed08be8ff866aac90f13836/e69fb3de87a8923e5931a272a38fa3cceb01da44/e3fa461d8b0e185b7da8a101fe94dfe6dd500ac0 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (271309). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.19.238
• 5.4.189
• 5.10.111
• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11
• 5.15.12
• 5.15.13
• 5.15.14
• 5.15.15
• 5.15.16
• 5.15.17
• 5.15.18
• 5.15.19
• 5.15.20
• 5.15.21
• 5.15.22
• 5.15.23
• 5.15.24
• 5.15.25
• 5.15.26
• 5.15.27
• 5.15.28
• 5.15.29
• 5.15.30
• 5.15.31
• 5.15.32
• 5.15.33
• 5.15.34
• 5.17.0
• 5.17.1
• 5.17.2
• 5.17.3

License

• open-source

Website

• Vendor: https://www.kernel.org/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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