Answer in brief
CVE-2026-31738 records a Unknown severity vulnerability in vxlan: validate ND option lengths in vxlan_na_create. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa <901c1dd3bab2955d7e664f914c374c8c3ac2b958 || >=4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa <e476745917a1e288eb15e7ff49d286a86a4861d3 || >=4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa <2029712fb2c87e9a8c75094906f2ee29bf08c500 || >=4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa <602596c69a70e50d9ab8c6ae0290a01f88229dd7 || >=4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa <de20d2e3b9179d132f5f5b44e490d7c916c6321b || >=4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa <eddfce70a6f3107d1679b0c2fcbeb96b593bd679 || >=4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa <b69c4236255bd8de16cd876e58c6f0867d1d78b1 || >=4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa <afa9a05e6c4971bd5586f1b304e14d61fb3d9385 || d8be18c52dbc94989f6d74637b731af39cd3d902 || 3927dace523706cc00f808520eaf2125dd7c07b5 || >=3.12.18 <3.13 || >=3.13.10 <3.14 | 901c1dd3bab2955d7e664f914c374c8c3ac2b958, e476745917a1e288eb15e7ff49d286a86a4861d3, 2029712fb2c87e9a8c75094906f2ee29bf08c500, 602596c69a70e50d9ab8c6ae0290a01f88229dd7, de20d2e3b9179d132f5f5b44e490d7c916c6321b, eddfce70a6f3107d1679b0c2fcbeb96b593bd679, b69c4236255bd8de16cd876e58c6f0867d1d78b1, afa9a05e6c4971bd5586f1b304e14d61fb3d9385, 3.13, 3.14 |
| Linux/Linuxgeneric | 3.14 | Not reported |
Published upstream
May 1, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 6, 2026
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.
Quoted source text, attributed separately from HOL analysis.