xen/netfront: don't leak the skb when xennet_fill_frags() fails
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.
CVE-2026-99057
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-99057
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
"lessThan": "5051df031144753d3e18862514969146b601d089",
"versionType": "git"
},
{
"status": "affected",
"version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
"lessThan": "99011a11c97340ef7290df7dc199305c73fab2f2",
"versionType": "git"
},
{
"status": "affected",
"version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
"lessThan": "086944c1c2cbb683543bc3ff08637847b03c8009",
"versionType": "git"
},
{
"status": "affected",
"version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
"lessThan": "84e3ea6502b5f14ce8d499d0b6e0e38386274cf0",
"versionType": "git"
},
{
"status": "affected",
"version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
"lessThan": "93ccaf1c26e2133396173b76a071e59024daa622",
"versionType": "git"
},
{
"status": "affected",
"version": "bd1468048aa3e2af865da92990539946d4483989",
"versionType": "git"
},
{
"status": "affected",
"version": "29a6193c0d74390c004808441061ac1812cf6f51",
"versionType": "git"
},
{
"status": "affected",
"version": "7eced4478f4ec6ff0a603ddfd6e24a5d3831fca7",
"versionType": "git"
},
{
"status": "affected",
"version": "b73a161e9beff24bf1803ba393dff95a255268f9",
"versionType": "git"
},
{
"status": "affected",
"version": "4.4.159",
"lessThan": "4.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.9.130",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.14.73",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.18.11",
"lessThan": "4.19",
"versionType": "semver"
}
],
"programFiles": [
"drivers/net/xen-netfront.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.11",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/xen-netfront.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-99057
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #52883 · Revision 1
- Added to Heist Feed
- Publisher date