xfrm: use hlist_del_init_rcu for state_cache and state_cache_input
In the Linux kernel, the following vulnerability has been resolved: xfrm: use hlist_del_init_rcu for state_cache and state_cache_input Commit 14acf9652e56 ("xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete") converted bydst/bysrc/byseq/byspi from hlist_del_rcu() to hlist_del_init_rcu() so that a second __xfrm_state_delete() on the same object becomes a no-op rather than a write through LIST_POISON pprev. It missed state_cache and state_cache_input, which kept hlist_del_rcu(): - hlist_del_rcu() leaves pprev = LIST_POISON2 (non-NULL), so hlist_unhashed() returns false. - hlist_del_init_rcu() leaves pprev = NULL, so hlist_unhashed() returns true. A second __xfrm_state_delete() therefore enters __hlist_del() on the already-deleted state_cache/state_cache_input nodes and does WRITE_ONCE(*pprev, next) through LIST_POISON2 — a write use-after-free once the slab is reused. The corruption can in turn cause a subsequent hlist_for_each_entry_rcu traversal to follow a dangling next pointer, producing the read use-after-free reported in xfrm_input_state_lookup(). Switch state_cache and state_cache_input to hlist_del_init_rcu() to match the other four lists, closing the write use-after-free and, with it, the read use-after-free it spawns.
CVE-2026-98230
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-2026-98230
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": "aa48a18fdb0911572d133057cd579db704b87da4",
"lessThan": "fb38fb7420d5f7192f9e2b6ac835ede149cd7ac5",
"versionType": "git"
},
{
"status": "affected",
"version": "0045e3d80613cc7174dc15f189ee6fc4e73b9365",
"lessThan": "4748c27e2e6a1969e02f1df46e62f79d2799b80b",
"versionType": "git"
},
{
"status": "affected",
"version": "0045e3d80613cc7174dc15f189ee6fc4e73b9365",
"lessThan": "9b74a47a4cbd0d29faff4f3b199212c73e6b6220",
"versionType": "git"
},
{
"status": "affected",
"version": "0045e3d80613cc7174dc15f189ee6fc4e73b9365",
"lessThan": "2afb8dc1f4390f164db8352f8e685e126e9db566",
"versionType": "git"
},
{
"status": "affected",
"version": "5e4334dc39443645415450163ff5ff1ee7e79784",
"versionType": "git"
},
{
"status": "affected",
"version": "6.12.13",
"lessThan": "6.12.112",
"versionType": "semver"
}
],
"programFiles": [
"net/xfrm/xfrm_state.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.13",
"versionType": "semver"
},
{
"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_state.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98230
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #38309 · Revision 1
- Added to Heist Feed
- Publisher date