CVE-2022-49727 ipv6: Fix signed integer overflow in l2tp_ip6_sendmsg

What is CVE-2022-49727?

CVE-2022-49727 is a medium-severity vulnerability in Linux kernel, published on 26 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

ipv6: Fix signed integer overflow in l2tp_ip6_sendmsg

When len >= INT_MAX - transhdrlen, ulen = len + transhdrlen will be overflow. To fix, we can follow what udpv6 does and subtract the transhdrlen from the max.

Weakness: CWE-190

Which versions are affected by CVE-2022-49727?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-49727?

Apply the vendor's patch.

Is CVE-2022-49727 being exploited?

There is no known exploitation of CVE-2022-49727 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2022-49727, GHSA-3943-4f4j-gcgj, UBUNTU-CVE-2022-49727.