{"id":"CVE-2026-64580","summary":"xfrm6: clear dst.dev on error to avoid double netdev_put in xfrm6_fill_dst()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm6: clear dst.dev on error to avoid double netdev_put in xfrm6_fill_dst()\n\nOn the error path where in6_dev_get(dev) returns NULL, xfrm6_fill_dst()\nreleases the device reference with netdev_put() but leaves\nxdst-\u003eu.dst.dev set. dst_destroy() later calls netdev_put(dst-\u003edev)\nagain, so the same net_device reference is released twice, underflowing\nits refcount (ref_tracker WARNING + \"unregister_netdevice: waiting for\n\u003cdev\u003e to become free\").\n\nClear xdst-\u003eu.dst.dev after the netdev_put(), the same way the XFRM\ndevice-offload paths xfrm_dev_state_add() and xfrm_dev_policy_add() in\nnet/xfrm/xfrm_device.c NULL -\u003edev when releasing the reference on error.\n\n  ref_tracker: reference already released.\n  ref_tracker: allocated in:\n   xfrm6_fill_dst (net/ipv6/xfrm6_policy.c:86)\n   ...\n   udpv6_sendmsg (net/ipv6/udp.c:1696)\n   ...\n  ref_tracker: freed in:\n   xfrm6_fill_dst (net/ipv6/xfrm6_policy.c:90)\n   ...\n  WARNING: lib/ref_tracker.c:322 at ref_tracker_free+0x58b/0x780\n   dst_destroy (net/core/dst.c:115)\n   rcu_core\n   handle_softirqs\n   ...","modified":"2026-10-14T11:27:02.541175367Z","published":"2026-08-05T08:09:34.946Z","related":["SUSE-SU-2026:4639-1","SUSE-SU-2026:4640-1","openSUSE-SU-2026:11476-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64580.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/136992de9bb91871084ae52d172610541c76e4d2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/43de8a49335e611adb271bbd52e84dfbc11fc185"},{"type":"WEB","url":"https://git.kernel.org/stable/c/97e032e5733e49471fb73de117ea2ac1ac7c479a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/df6856c2dda9187601d29b5fbd7a81b3b178cedf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e078da1b4e11390cff3201c19a9a1fe70c5b934f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ff636d7b7cba6dea82ecf580415ea57f2c1a11b6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64580.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64580"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"84c4a9dfbf430861e7588d95ae3ff61535dca351"},{"fixed":"97e032e5733e49471fb73de117ea2ac1ac7c479a"},{"fixed":"df6856c2dda9187601d29b5fbd7a81b3b178cedf"},{"fixed":"43de8a49335e611adb271bbd52e84dfbc11fc185"},{"fixed":"ff636d7b7cba6dea82ecf580415ea57f2c1a11b6"},{"fixed":"e078da1b4e11390cff3201c19a9a1fe70c5b934f"},{"fixed":"136992de9bb91871084ae52d172610541c76e4d2"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.0.79"},{"fixed":"3.1"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.2.46"},{"fixed":"3.3"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.4.46"},{"fixed":"3.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.9.3"},{"fixed":"3.10"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a7e22d0c0e81dde129a51ee413644124f4b59954"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"01b0d887f67a388fb2a658ee2bdd74e5ba146818"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a98124aac0b5adc5de8ae54f11322781cb4d85c3"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e27b7bee743d921f037b1da6f071237345bef7c1"}]}],"versions":["v3.0.101","v3.0.100","v3.0.99","v3.0.98","v3.0.97","v3.0.96","v3.0.95","v3.0.94","v3.0.93","v3.0.92","v3.0.91","v3.0.90","v3.0.89","v3.0.88","v3.0.87","v3.0.86","v3.0.85","v3.0.84","v3.0.83","v3.0.82","v3.0.81","v3.0.80","v3.0.79","v3.2.102","v3.2.101","v3.2.100","v3.2.99","v3.2.98","v3.2.97","v3.2.96","v3.2.95","v3.2.94","v3.2.93","v3.2.92","v3.2.91","v3.2.90","v3.2.89","v3.2.88","v3.2.87","v3.2.86","v3.2.85","v3.2.84","v3.2.83","v3.2.82","v3.2.81","v3.2.80","v3.2.79","v3.2.78","v3.2.77","v3.2.76","v3.2.75","v3.2.74","v3.2.73","v3.2.72","v3.2.71","v3.2.70","v3.2.69","v3.2.68","v3.2.67","v3.2.66","v3.2.65","v3.2.64","v3.2.63","v3.2.62","v3.2.61","v3.2.60","v3.2.59","v3.2.58","v3.2.57","v3.2.56","v3.2.55","v3.2.54","v3.2.53","v3.2.52","v3.2.51","v3.2.50","v3.2.49","v3.2.48","v3.2.47","v3.2.46","v3.4.113","v3.4.112","v3.4.111","v3.4.110","v3.4.109","v3.4.108","v3.4.107","v3.4.106","v3.4.105","v3.4.104","v3.4.103","v3.4.102","v3.4.101","v3.4.100","v3.4.99","v3.4.98","v3.4.97","v3.4.96","v3.4.95","v3.4.94","v3.4.93","v3.4.92","v3.4.91","v3.4.90","v3.4.89","v3.4.88","v3.4.87","v3.4.86","v3.4.85","v3.4.84","v3.4.83","v3.4.82","v3.4.81","v3.4.80","v3.4.79","v3.4.78","v3.4.77","v3.4.76","v3.4.75","v3.4.74","v3.4.73","v3.4.72","v3.4.71","v3.4.70","v3.4.69","v3.4.68","v3.4.67","v3.4.66","v3.4.65","v3.4.64","v3.4.63","v3.4.62","v3.4.61","v3.4.60","v3.4.59","v3.4.58","v3.4.57","v3.4.56","v3.4.55","v3.4.54","v3.4.53","v3.4.52","v3.4.51","v3.4.50","v3.4.49","v3.4.48","v3.4.47","v3.4.46","v3.9.11","v3.9.10","v3.9.9","v3.9.8","v3.9.7","v3.9.6","v3.9.5","v3.9.4","v3.9.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64580.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.10.0"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.148"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.101"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.42"}]},{"type":"ECOSYSTEM","events":[{"introd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