Answer in brief
CVE-2026-99057 records a Unknown severity vulnerability in xen/netfront: don't leak the skb when xennet_fill_frags() fails. 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 | >=ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c <5051df031144753d3e18862514969146b601d089 || >=ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c <99011a11c97340ef7290df7dc199305c73fab2f2 || >=ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c <086944c1c2cbb683543bc3ff08637847b03c8009 || >=ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c <84e3ea6502b5f14ce8d499d0b6e0e38386274cf0 || >=ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c <93ccaf1c26e2133396173b76a071e59024daa622 || bd1468048aa3e2af865da92990539946d4483989 || 29a6193c0d74390c004808441061ac1812cf6f51 || 7eced4478f4ec6ff0a603ddfd6e24a5d3831fca7 || b73a161e9beff24bf1803ba393dff95a255268f9 || >=4.4.159 <4.5 || >=4.9.130 <4.10 || >=4.14.73 <4.15 || >=4.18.11 <4.19 | 5051df031144753d3e18862514969146b601d089, 99011a11c97340ef7290df7dc199305c73fab2f2, 086944c1c2cbb683543bc3ff08637847b03c8009, 84e3ea6502b5f14ce8d499d0b6e0e38386274cf0, 93ccaf1c26e2133396173b76a071e59024daa622, 4.5, 4.10, 4.15, 4.19 |
| Linux/Linuxgeneric | 4.19 | Not reported |
Published upstream
Oct 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 23, 2026
In the Linux kernel, the following vulnerability has been resolved: xen/netfront: don't leak the skb when xennet_fill_frags() fails When a response chain has more slots than fit in the skb's frags, xennet_fill_frags() returns an error and xennet_poll() jumps to its error path. That path moves what's left on tmpq to errq to be freed, but the skb being filled was already dequeued from tmpq, so it's never freed. Each chain that overflows leaks the skb and the pages attached to it as frags, and the backend decides how many slots it sends. Put the skb back on tmpq before taking the error path, like the xennet_set_skb_gso() failure just above it does.
Quoted source text, attributed separately from HOL analysis.