xfrm: add missing rcu_read_lock(), skb_dst_force() and dev_hold() for xfrm_trans_reinject()
In the Linux kernel, the following vulnerability has been resolved: xfrm: add missing rcu_read_lock(), skb_dst_force() and dev_hold() for xfrm_trans_reinject() syzbot reported a suspicious RCU usage warning in ip6_pkt_drop(): WARNING: suspicious RCU usage in ip6_pkt_drop include/net/addrconf.h:389 suspicious rcu_dereference_check() usage! Call Trace: __in6_dev_get_safely include/net/addrconf.h:389 [inline] ip6_pkt_drop+0x596/0x610 net/ipv6/route.c:4620 ip6_pkt_discard+0x1c/0x30 net/ipv6/route.c:4651 xfrm_trans_reinject+0x324/0x630 net/xfrm/xfrm_input.c:806 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 When commit 4f4920669d21 ("xfrm: Reinject transport-mode packets through workqueue") converted xfrm_trans_reinject from a tasklet to a workqueue, the reinjection loop ceased running in softirq context. Workqueue workers run in process context where local_bh_disable() does not enter an RCU read-side critical section under CONFIG_PREEMPT_RCU. Because finish callbacks (such as ip6_rcv_finish) expect to run under an RCU read lock (performing route lookups, l3mdev lookups, and accessing RCU-protected data structures), invoking them in workqueue context without rcu_read_lock() triggers RCU lockdep warnings. Furthermore, packets queued to the workqueue via xfrm_trans_queue_net() may carry non-refcounted (noref) dst entries (e.g. from ip_route_input_noref). Additionally, on
CVE-2026-98369
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-2026-98369
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": "7d98b26684cb2390729525b341ea099f0badbe18",
"lessThan": "41e47f1664be86c91326f0afe0504a1162d00907",
"versionType": "git"
},
{
"status": "affected",
"version": "4f4920669d21e1060b7243e5118dc3b71ced1276",
"lessThan": "6601d91a85761f33351c71e04ec0bbd294ca07ce",
"versionType": "git"
},
{
"status": "affected",
"version": "4f4920669d21e1060b7243e5118dc3b71ced1276",
"lessThan": "0cda8273265d30cac6423834fd7d4acb75f04fdb",
"versionType": "git"
},
{
"status": "affected",
"version": "4f4920669d21e1060b7243e5118dc3b71ced1276",
"lessThan": "68a317b4aec8ca1868a39d69e40f9e29baa4f40a",
"versionType": "git"
},
{
"status": "affected",
"version": "4f4920669d21e1060b7243e5118dc3b71ced1276",
"lessThan": "6eb3b071be8e260543c604550c54dac66e6b174b",
"versionType": "git"
},
{
"status": "affected",
"version": "4f4920669d21e1060b7243e5118dc3b71ced1276",
"lessThan": "664fc0941df7c1918b2cd4de6ee00469ba77d8e4",
"versionType": "git"
},
{
"status": "affected",
"version": "4f4920669d21e1060b7243e5118dc3b71ced1276",
"lessThan": "d2f5082f9e84653fa1a9e8aebaaff23e688f5e19",
"versionType": "git"
},
{
"status": "affected",
"version": "f520075da484306bbb8425afd2c42404ba74816f",
"versionType": "git"
},
{
"status": "affected",
"version": "130d9e5017ade1b81d16783563edb38c12a2eab7",
"versionType": "git"
},
{
"status": "affected",
"version": "5.15.75",
"lessThan": "5.15.222",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.19.17",
"lessThan": "5.20",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.0.3",
"lessThan": "6.1",
"versionType": "semver"
}
],
"programFiles": [
"net/xfrm/xfrm_input.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.1",
"versionType": "semver"
},
{
"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_input.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98369
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #38447 · Revision 1
- Added to Heist Feed
- Publisher date