CVE-2026-99057
Full vulnerability record from the local CVENow database.
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.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-10-23 13:17:29.373000
Last modified
2026-10-30 13:21:42.453000
View original CVE JSON
{
"id": "CVE-2026-99057",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-10-23T13:17:29.373",
"lastModified": "2026-10-30T13:21:42.453",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen/netfront: don't leak the skb when xennet_fill_frags() fails\n\nWhen a response chain has more slots than fit in the skb's frags,\nxennet_fill_frags() returns an error and xennet_poll() jumps to its\nerror path. That path moves what's left on tmpq to errq to be freed,\nbut the skb being filled was already dequeued from tmpq, so it's never\nfreed. Each chain that overflows leaks the skb and the pages attached\nto it as frags, and the backend decides how many slots it sends.\n\nPut the skb back on tmpq before taking the error path, like the\nxennet_set_skb_gso() failure just above it does."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/net/xen-netfront.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "ad4f15dc2c70b1de5e0a64d27335962fbc9cf71c",
"lessThan": "6e6bd1051daabc327233c3ca3d00613fc6783c8e",
"versionType": "git",
"status": "affected"
},
{
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"status": "affected"
},
{
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{
"version": "4.4.159",
"lessThan": "4.5",
"versionType": "semver",
"status": "affected"
},
{
"version": "4.9.130",
"lessThan": "4.10",
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"status": "affected"
},
{
"version": "4.14.73",
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"status": "affected"
},
{
"version": "4.18.11",
"lessThan": "4.19",
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]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/net/xen-netfront.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "4.19",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.19",
"versionType": "semver",
"status": "unaffected"
},
{
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected"
},
{
"version": "5.15.224",
"lessThanOrEqual": "5.15.*",
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"status": "unaffected"
},
{
"version": "6.1.191",
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"status": "unaffected"
},
{
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"status": "unaffected"
},
{
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"lessThanOrEqual": "6.12.*",
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},
{
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},
{
"version": "7.2.11",
"lessThanOrEqual": "7.2.*",
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},
{
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"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/086944c1c2cbb683543bc3ff08637847b03c8009",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
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}
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}