xfrm6: clear dst.dev on error to avoid double netdev_put in xfrm6_fill_dst()
In the Linux kernel, the following vulnerability has been resolved: xfrm6: clear dst.dev on error to avoid double netdev_put in xfrm6_fill_dst() On the error path where in6_dev_get(dev) returns NULL, xfrm6_fill_dst() releases the device reference with netdev_put() but leaves xdst->u.dst.dev set. dst_destroy() later calls netdev_put(dst->dev) again, so the same net_device reference is released twice, underflowing its refcount (ref_tracker WARNING + "unregister_netdevice: waiting for to become free"). Clear xdst->u.dst.dev after the netdev_put(), the same way the XFRM device-offload paths xfrm_dev_state_add() and xfrm_dev_policy_add() in net/xfrm/xfrm_device.c NULL ->dev when releasing the reference on error. ref_tracker: reference already released. ref_tracker: allocated in: xfrm6_fill_dst (net/ipv6/xfrm6_policy.c:86) ... udpv6_sendmsg (net/ipv6/udp.c:1696) ... ref_tracker: freed in: xfrm6_fill_dst (net/ipv6/xfrm6_policy.c:90) ... WARNING: lib/ref_tracker.c:322 at ref_tracker_free+0x58b/0x780 dst_destroy (net/core/dst.c:115) rcu_core handle_softirqs ...
CVE-2026-64580
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-2026-64580
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": "84c4a9dfbf430861e7588d95ae3ff61535dca351",
"lessThan": "97e032e5733e49471fb73de117ea2ac1ac7c479a",
"versionType": "git"
},
{
"status": "affected",
"version": "84c4a9dfbf430861e7588d95ae3ff61535dca351",
"lessThan": "df6856c2dda9187601d29b5fbd7a81b3b178cedf",
"versionType": "git"
},
{
"status": "affected",
"version": "84c4a9dfbf430861e7588d95ae3ff61535dca351",
"lessThan": "43de8a49335e611adb271bbd52e84dfbc11fc185",
"versionType": "git"
},
{
"status": "affected",
"version": "84c4a9dfbf430861e7588d95ae3ff61535dca351",
"lessThan": "ff636d7b7cba6dea82ecf580415ea57f2c1a11b6",
"versionType": "git"
},
{
"status": "affected",
"version": "84c4a9dfbf430861e7588d95ae3ff61535dca351",
"lessThan": "e078da1b4e11390cff3201c19a9a1fe70c5b934f",
"versionType": "git"
},
{
"status": "affected",
"version": "84c4a9dfbf430861e7588d95ae3ff61535dca351",
"lessThan": "136992de9bb91871084ae52d172610541c76e4d2",
"versionType": "git"
},
{
"status": "affected",
"version": "a7e22d0c0e81dde129a51ee413644124f4b59954",
"versionType": "git"
},
{
"status": "affected",
"version": "01b0d887f67a388fb2a658ee2bdd74e5ba146818",
"versionType": "git"
},
{
"status": "affected",
"version": "a98124aac0b5adc5de8ae54f11322781cb4d85c3",
"versionType": "git"
},
{
"status": "affected",
"version": "e27b7bee743d921f037b1da6f071237345bef7c1",
"versionType": "git"
},
{
"status": "affected",
"version": "3.0.79",
"lessThan": "3.1",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.2.46",
"lessThan": "3.3",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.4.46",
"lessThan": "3.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.9.3",
"lessThan": "3.10",
"versionType": "semver"
}
],
"programFiles": [
"net/ipv6/xfrm6_policy.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/ipv6/xfrm6_policy.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-64580
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41097 · Revision 1
- Added to Heist Feed
- Publisher date