tun: free page on build_skb failure in tun_xdp_one()
In the Linux kernel, the following vulnerability has been resolved: tun: free page on build_skb failure in tun_xdp_one() When build_skb() fails in tun_xdp_one(), the function sets ret to -ENOMEM and jumps to the out label, which returns without freeing the page that vhost_net_build_xdp() allocated for the frame. As with the short-frame rejection path, tun_sendmsg() discards the per-buffer error and still returns total_len, so vhost_tx_batch() takes the success path and never frees the page. Each build_skb() failure in a batch leaks one page-frag chunk. Free the page before taking the error path, matching the put_page() the other error exits of tun_xdp_one() already perform.
CVE-2026-46322
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-2026-46322
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": "043d222f93ab8c76b56a3b315cd8692e35affb6c",
"lessThan": "26fe549b5192536b6c1c68a2dfdc8c0dcf9fa4a9",
"versionType": "git"
},
{
"status": "affected",
"version": "043d222f93ab8c76b56a3b315cd8692e35affb6c",
"lessThan": "793385c154771603b8671dd8338927221e9d8d78",
"versionType": "git"
},
{
"status": "affected",
"version": "043d222f93ab8c76b56a3b315cd8692e35affb6c",
"lessThan": "2638a9c1521905bb5c5d1e95c8fbc09f79148ed7",
"versionType": "git"
},
{
"status": "affected",
"version": "043d222f93ab8c76b56a3b315cd8692e35affb6c",
"lessThan": "60d9c0d6cdde5420d6483c921b16fe5465eb5238",
"versionType": "git"
},
{
"status": "affected",
"version": "043d222f93ab8c76b56a3b315cd8692e35affb6c",
"lessThan": "d16e38fac09a47bfcf98c1ad65a1bb53f94540f5",
"versionType": "git"
},
{
"status": "affected",
"version": "043d222f93ab8c76b56a3b315cd8692e35affb6c",
"lessThan": "aa308e9dbb9acb17cacdbbce9e4504f69bac8385",
"versionType": "git"
},
{
"status": "affected",
"version": "043d222f93ab8c76b56a3b315cd8692e35affb6c",
"lessThan": "4fefc6156a162a9f50035c12091a5e5130c82c6e",
"versionType": "git"
},
{
"status": "affected",
"version": "043d222f93ab8c76b56a3b315cd8692e35affb6c",
"lessThan": "aa8963fdce667a42fb7f0bdd2909fadcab02f9a8",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/tun.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.20"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.259",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.210",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.176",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.143",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.93",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.35",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.12",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/tun.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46322
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40681 · Revision 1
- Added to Heist Feed
- Publisher date