CVE-2026-99057
Received
Received - Intake
Memory Leak in Linux Kernel Netfront Driver
Vulnerability report for CVE-2026-99057, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-23
Last updated on: 2026-10-23
Assigner: kernel.org
Description
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c |
| Linux | Linux | ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c |
| Linux | Linux | ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c |
| Linux | Linux | ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c |
| Linux | Linux | ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c |
| Linux | Linux | bd1468048aa3e2af865da92990539946d4483989 |
| Linux | Linux | 29a6193c0d74390c004808441061ac1812cf6f51 |
| Linux | Linux | 7eced4478f4ec6ff0a603ddfd6e24a5d3831fca7 |
| Linux | Linux | b73a161e9beff24bf1803ba393dff95a255268f9 |
| Linux | Linux | 4.4.159 |
| Linux | Linux | 4.9.130 |
| Linux | Linux | 4.14.73 |
| Linux | Linux | 4.18.11 |
| Linux | Linux | 4.19 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
