Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.12.18, < 3.13 |
References
- https://git.kernel.org/stable/c/2029712fb2c87e9a8c75094906f2ee29bf08c500Patch
- https://git.kernel.org/stable/c/602596c69a70e50d9ab8c6ae0290a01f88229dd7Patch
- https://git.kernel.org/stable/c/901c1dd3bab2955d7e664f914c374c8c3ac2b958Patch
- https://git.kernel.org/stable/c/afa9a05e6c4971bd5586f1b304e14d61fb3d9385Patch
- https://git.kernel.org/stable/c/b69c4236255bd8de16cd876e58c6f0867d1d78b1Patch
- https://git.kernel.org/stable/c/de20d2e3b9179d132f5f5b44e490d7c916c6321bPatch
- https://git.kernel.org/stable/c/e476745917a1e288eb15e7ff49d286a86a4861d3Patch
- https://git.kernel.org/stable/c/eddfce70a6f3107d1679b0c2fcbeb96b593bd679Patch
FAQ
What is CVE-2026-31738?
CVE-2026-31738 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 ma...
How severe is CVE-2026-31738?
CVE-2026-31738 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31738?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.