xfrm: fix compat ALLOCSPI request use-after-free
In the Linux kernel, the following vulnerability has been resolved: xfrm: fix compat ALLOCSPI request use-after-free xfrm_state_netlink() builds the ALLOCSPI response with dump_one_state(), which already calls alloc_compat() with the response skb and header. xfrm_alloc_userspi() then calls alloc_compat() again, but passes the original request skb and its header. For a compat request, the translator therefore interprets the 228-byte compat xfrm_userspi_info as the 232-byte native layout and reads four bytes past the declared payload. It also publishes the translated child through the request's frag_list. A multicast clone of the request shares skb_shared_info and can observe that child. xfrm_user_rcv_msg() frees it after the request handler returns, racing a compat receiver which may still be copying from it and resulting in a use-after-free. Remove the redundant conversion. The response keeps its correct compat translation from dump_one_state(), and no child is attached to the inbound request.
CVE-2026-98370
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-2026-98370
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": "5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3",
"lessThan": "494f2bee9d8d0ebcfa249ac41bed7fed26d119b4",
"versionType": "git"
},
{
"status": "affected",
"version": "5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3",
"lessThan": "17893987e52918c23945c42e47e894a936305a25",
"versionType": "git"
},
{
"status": "affected",
"version": "5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3",
"lessThan": "42971ea17c7a8afc0bdd5ca40648bf4e5bb7b810",
"versionType": "git"
},
{
"status": "affected",
"version": "5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3",
"lessThan": "2b63341e2ebc9b6f73cbd9214dbe7d46dd98c718",
"versionType": "git"
},
{
"status": "affected",
"version": "5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3",
"lessThan": "bb63ab52a18273ec68340ac49aebbaa7b514ccd5",
"versionType": "git"
},
{
"status": "affected",
"version": "5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3",
"lessThan": "248433942155b42a0ef04a5806c8aca024ea7c33",
"versionType": "git"
},
{
"status": "affected",
"version": "5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3",
"lessThan": "e70f639aee2ff0def155c256cace9e0f81d998e2",
"versionType": "git"
},
{
"status": "affected",
"version": "5f3eea6b7e8f58cf5c8a9d4b9679dc19e9e67ba3",
"lessThan": "d1ebd9081879fd9ae9c8fb7e8928f19cc88ae320",
"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": "5.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/xfrm/xfrm_user.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98370
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38449 · Revision 1
- Added to Heist Feed
- Publisher date