xfrm_user: fix info leak in build_report()
In the Linux kernel, the following vulnerability has been resolved: xfrm_user: fix info leak in build_report() struct xfrm_user_report is a __u8 proto field followed by a struct xfrm_selector which means there is three "empty" bytes of padding, but the padding is never zeroed before copying to userspace. Fix that up by zeroing the structure before setting individual member variables.
CVE-2026-31671
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-2026-31671
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": "97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5",
"lessThan": "d27c02eec529f78055a46a5c9e6c62684382b2d8",
"versionType": "git"
},
{
"status": "affected",
"version": "97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5",
"lessThan": "716c546e88cfe49d841658240e10cb57bc50a2cc",
"versionType": "git"
},
{
"status": "affected",
"version": "97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5",
"lessThan": "0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9",
"versionType": "git"
},
{
"status": "affected",
"version": "97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5",
"lessThan": "e0c8542c3d097ed4205ded51868195d5d6ddac62",
"versionType": "git"
},
{
"status": "affected",
"version": "97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5",
"lessThan": "ff5ee507302303b15859753c3e0d67d38fd12c88",
"versionType": "git"
},
{
"status": "affected",
"version": "97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5",
"lessThan": "6c55714c931051cd7f4839c19ce0867179fd22fe",
"versionType": "git"
},
{
"status": "affected",
"version": "97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5",
"lessThan": "0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72",
"versionType": "git"
},
{
"status": "affected",
"version": "97a64b4577ae2bc5599dbd008a3cd9e25de9b9f5",
"lessThan": "d10119968d0e1f2b669604baf2a8b5fdb72fa6b4",
"versionType": "git"
}
],
"programFiles": [
"net/xfrm/xfrm_user.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.253",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.169",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.135",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.82",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.23",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.13",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/xfrm/xfrm_user.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-31671
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #28311 · Revision 1
- Added to Heist Feed
- Publisher date