Answer in brief
CVE-2026-74705 records a Unknown severity vulnerability in udp: fix potential use-after-free in tunnel segmentation. 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 | >=dbef491ebe7f3a4fb1b9111878b86a426fd540b7 <6a733a38b983d8c2e222f13968209010cf44de87 || >=dbef491ebe7f3a4fb1b9111878b86a426fd540b7 <19d89b13a43640b2da2f277ee462d919d988cb6f || >=dbef491ebe7f3a4fb1b9111878b86a426fd540b7 <b3df61bb745eb5201eac22679a2839d4ccbf3442 || >=dbef491ebe7f3a4fb1b9111878b86a426fd540b7 <1ae134c012e10384cdac420b5cc6e0615cde0b55 || >=dbef491ebe7f3a4fb1b9111878b86a426fd540b7 <5161e67c561c4f28a5d9335a6e859b02511de92b || >=dbef491ebe7f3a4fb1b9111878b86a426fd540b7 <64d322c288577793eedd352b96ef75234ed380fe || >=dbef491ebe7f3a4fb1b9111878b86a426fd540b7 <588d4a6795d99d080f74ef0b5f391ea8c453ae5d || >=dbef491ebe7f3a4fb1b9111878b86a426fd540b7 <d0f86fb36eb260abd10007b62c9dcc1028e03e61 | 6a733a38b983d8c2e222f13968209010cf44de87, 19d89b13a43640b2da2f277ee462d919d988cb6f, b3df61bb745eb5201eac22679a2839d4ccbf3442, 1ae134c012e10384cdac420b5cc6e0615cde0b55, 5161e67c561c4f28a5d9335a6e859b02511de92b, 64d322c288577793eedd352b96ef75234ed380fe, 588d4a6795d99d080f74ef0b5f391ea8c453ae5d, d0f86fb36eb260abd10007b62c9dcc1028e03e61 |
| Linux/Linuxgeneric | 4.6 | Not reported |
Published upstream
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 22, 2026
In the Linux kernel, the following vulnerability has been resolved: udp: fix potential use-after-free in tunnel segmentation __skb_udp_tunnel_segment() gets the UDP header before ensuring the tunnel header is in the skb head. If the pull reallocates skb->head, the saved UDP header pointer is no longer valid. Get the UDP header after the pull to avoid a potential use-after-free.
Quoted source text, attributed separately from HOL analysis.