Answer in brief
CVE-2026-80681 records a Critical severity (CVSS 9.8) vulnerability in vxlan: re-fetch eth header after route_shortcircuit(). 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.
CVSS is 9.8. 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 | >=ae8840825605f36f98f247323edc150e761cb64e <6375093eb45cd7d89f1945f939eeae3b29d79f56 || >=ae8840825605f36f98f247323edc150e761cb64e <1b7f7b653e3557690047c62f03b80a24ea5a58a5 || >=ae8840825605f36f98f247323edc150e761cb64e <bf045341dfb3e767f0ff94cf240ce3c371973bd4 || >=ae8840825605f36f98f247323edc150e761cb64e <2355c8c26d2aa1b4385b369e67202e47d460d555 || >=ae8840825605f36f98f247323edc150e761cb64e <1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585 || >=ae8840825605f36f98f247323edc150e761cb64e <1235e017aa11cf01e91b613c4c5ed6aa28934fff || >=ae8840825605f36f98f247323edc150e761cb64e <c9dceac9e1c7c772c43c732fc0d325e72835801a || >=ae8840825605f36f98f247323edc150e761cb64e <1395a676ec15a0a02a2a6d86602324f2d5fd41d5 | 6375093eb45cd7d89f1945f939eeae3b29d79f56, 1b7f7b653e3557690047c62f03b80a24ea5a58a5, bf045341dfb3e767f0ff94cf240ce3c371973bd4, 2355c8c26d2aa1b4385b369e67202e47d460d555, 1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585, 1235e017aa11cf01e91b613c4c5ed6aa28934fff, c9dceac9e1c7c772c43c732fc0d325e72835801a, 1395a676ec15a0a02a2a6d86602324f2d5fd41d5 |
| Linux/Linuxgeneric | 3.10 | Not reported |
Published upstream
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 29, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 28, 2026
In the Linux kernel, the following vulnerability has been resolved: vxlan: re-fetch eth header after route_shortcircuit() Before route_shortcircuit(), the eth header pointer is cached from eth_hdr(skb). Inside route_shortcircuit(), pskb_may_pull() can be called, which may reallocate skb->head. In this case, returning to vxlan_xmit() leaves the cached eth pointer pointing to freed memory, leading to a use-after-free when dereferencing eth->h_dest. Fix this by updating eth = eth_hdr(skb) after calling route_shortcircuit().
Quoted source text, attributed separately from HOL analysis.