CVE-2026-31738
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.
Does this matter?
Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.12% probability · 2th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.