CVE-2026-31738
vxlan: validate ND option lengths in vxlan_na_create
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 3.13, 3.14
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 3.12.18 · fixed in 3.13; From 3.13.10 · fixed in 3.14
- Linux Linux
3.14
References 8
git.kernel.org
- stable/c/901c1dd3bab2955d7e664f914c374c8c3ac2b958
- stable/c/e476745917a1e288eb15e7ff49d286a86a4861d3
- stable/c/2029712fb2c87e9a8c75094906f2ee29bf08c500
- stable/c/602596c69a70e50d9ab8c6ae0290a01f88229dd7
- stable/c/de20d2e3b9179d132f5f5b44e490d7c916c6321b
- stable/c/eddfce70a6f3107d1679b0c2fcbeb96b593bd679
- stable/c/b69c4236255bd8de16cd876e58c6f0867d1d78b1
- stable/c/afa9a05e6c4971bd5586f1b304e14d61fb3d9385