CVE-2022-49727: linux kernel Integer Overflow — Fix

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.

Is your site exposed to CVE-2022-49727?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-190 Integer Overflow

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 4.9.320
linux	linux_kernel	4.10 — 4.14.285
linux	linux_kernel	4.15 — 4.19.249
linux	linux_kernel	4.20 — 5.4.200
linux	linux_kernel	5.5 — 5.10.124
linux	linux_kernel	5.11 — 5.15.49
linux	linux_kernel	5.16 — 5.18.6
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/034246122f5c5e2e2a0b9fe04e24517920e9beb1 https://git.kernel.org/stable/c/0e818d433fc2718fe4da044ffca7431812a7e04e https://git.kernel.org/stable/c/27a37755ceb401111ded76810359d3adc4b268a1 https://git.kernel.org/stable/c/2cf73c7cb6125083408d77f43d0e84d86aed0000 https://git.kernel.org/stable/c/2f42389d270f2304c8855b0b63498a5a4d0c053d https://git.kernel.org/stable/c/6c4e3486d21173d60925ef52e512cae727b43d30 https://git.kernel.org/stable/c/b8879ca1fd7348b4d5db7db86dcb97f60c73d751 https://git.kernel.org/stable/c/f638a84afef3dfe10554c51820c16e39a278c915

Frequently Asked Questions

What is CVE-2022-49727? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49727? +

CVE-2022-49727 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2022-49727? +

CVE-2022-49727 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2022-49727? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-53910

diff3 tool from GNU diffutils is vulnerable to a heap‑based buffer overflow due to multiple signed integer overflows in line‑mapping …

CVE-2025-2574

Out-of-bounds array write in Xpdf 4.05 and earlier, due to incorrect integer overflow checking in the PostScript function interpreter code.

CVE-2025-46333

z2d is a pure Zig 2D graphics library. Versions of z2d after `0.5.1` and up to and including `0.6.0`, when …

CVE-2024-30212

If a SCSI READ(10) command is initiated via USB using the largest LBA (0xFFFFFFFF) with it's default block size of …

CVE-2025-52935

Integer Overflow or Wraparound vulnerability in dragonflydb dragonfly (src/redis/lua/struct modules). This vulnerability is associated with program files lua_struct.C. This issue …

CVE-2025-7709

An integer overflow exists in the FTS5 https://sqlite.org/fts5.html extension. It occurs when the size of an array of tombstone pointers …

CVE-2022-49727