CVE-2026-31738
MEDIUM severity · CVSS 5.5
5.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/2029712fb2c87e9a8c75094906f2ee29bf08c500 ↗
Additional information
- NVD record
- 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