{"id":"CVE-2026-64580","revision":"199bb0f45a6047a58bdeee7b0e869981","records":[{"revision":"199bb0f45a6047a58bdeee7b0e869981","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-64580","aliases":[],"title":"xfrm6: clear dst.dev on error to avoid double netdev_put in xfrm6_fill_dst()","description":"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->u.dst.dev set. dst_destroy() later calls netdev_put(dst->dev)\nagain, so the same net_device reference is released twice, underflowing\nits refcount (ref_tracker WARNING + \"unregister_netdevice: waiting for\n<dev> to become free\").\n\nClear xdst->u.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 ->dev 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   ...","state":0,"publishedAt":"2026-08-05T08:09:34.946+00:00","modifiedAt":"2026-10-19T20:48:42.908+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ipv6/xfrm6_policy.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"84c4a9dfbf430861e7588d95ae3ff61535dca351\",\n                            \"lessThan\": \"97e032e5733e49471fb73de117ea2ac1ac7c479a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"84c4a9dfbf430861e7588d95ae3ff61535dca351\",\n                            \"lessThan\": \"df6856c2dda9187601d29b5fbd7a81b3b178cedf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"84c4a9dfbf430861e7588d95ae3ff61535dca351\",\n                            \"lessThan\": \"43de8a49335e611adb271bbd52e84dfbc11fc185\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"84c4a9dfbf430861e7588d95ae3ff61535dca351\",\n                            \"lessThan\": \"ff636d7b7cba6dea82ecf580415ea57f2c1a11b6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"84c4a9dfbf430861e7588d95ae3ff61535dca351\",\n                            \"lessThan\": \"e078da1b4e11390cff3201c19a9a1fe70c5b934f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"84c4a9dfbf430861e7588d95ae3ff61535dca351\",\n                            \"lessThan\": \"136992de9bb91871084ae52d172610541c76e4d2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a7e22d0c0e81dde129a51ee413644124f4b59954\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"01b0d887f67a388fb2a658ee2bdd74e5ba146818\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a98124aac0b5adc5de8ae54f11322781cb4d85c3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e27b7bee743d921f037b1da6f071237345bef7c1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3.0.79\",\n                            \"lessThan\": \"3.1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"3.2.46\",\n                            \"lessThan\": \"3.3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"3.4.46\",\n                            \"lessThan\": \"3.5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"3.9.3\",\n                            \"lessThan\": \"3.10\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/ipv6/xfrm6_policy.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.10\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.10\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.183\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.148\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.101\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.42\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.6\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/97e032e5733e49471fb73de117ea2ac1ac7c479a","https://git.kernel.org/stable/c/df6856c2dda9187601d29b5fbd7a81b3b178cedf","https://git.kernel.org/stable/c/43de8a49335e611adb271bbd52e84dfbc11fc185","https://git.kernel.org/stable/c/ff636d7b7cba6dea82ecf580415ea57f2c1a11b6","https://git.kernel.org/stable/c/e078da1b4e11390cff3201c19a9a1fe70c5b934f","https://git.kernel.org/stable/c/136992de9bb91871084ae52d172610541c76e4d2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64580","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-64580","identifiers":["CVE-2026-64580"]},"retained":false,"historicalAffected":[]}],"coverage":[]}