CVE-2026-31738
Medium
Description
In the Linux kernel, the following vulnerability has been resolved: vxlan: validate ND option lengths in vxlan_na_create vxlan_na_create() walks ND options according to option-provided lengths. A malformed option can make the parser advance beyond the computed option span or use a too-short source LLADDR option payload. Validate option lengths against the remaining NS option area before advancing, and only read source LLADDR when the option is large enough for an Ethernet address.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedMay 1, 2026
First seenMay 1, 2026
How to fix
Update
- linux linux_kernel3.13, 3.14, 5.10.253, 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12 or later
Patches
- git.kernel.org/stable/c/2029712fb2c87e9a8c75094906f2ee29bf08c500
- git.kernel.org/stable/c/602596c69a70e50d9ab8c6ae0290a01f88229dd7
- git.kernel.org/stable/c/901c1dd3bab2955d7e664f914c374c8c3ac2b958
- git.kernel.org/stable/c/afa9a05e6c4971bd5586f1b304e14d61fb3d9385
- git.kernel.org/stable/c/b69c4236255bd8de16cd876e58c6f0867d1d78b1
- git.kernel.org/stable/c/de20d2e3b9179d132f5f5b44e490d7c916c6321b
- git.kernel.org/stable/c/e476745917a1e288eb15e7ff49d286a86a4861d3
- git.kernel.org/stable/c/eddfce70a6f3107d1679b0c2fcbeb96b593bd679
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 3.12.18 ≤ v < 3.13, 3.13.10 ≤ v < 3.14, 3.14.1 ≤ v < 5.10.253, 5.11 ≤ v < 5.15.203, 5.16 ≤ v < 6.1.168, 6.2 ≤ v < 6.6.134, 6.7 ≤ v < 6.12.81, 6.13 ≤ v < 6.18.22, 6.19 ≤ v < 6.19.12, 3.14, 7.0 | 3.13, 3.14, 5.10.253, 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.