{"api_version":"1","generated_at":"2026-08-06T02:59:02+00:00","cve":"CVE-2026-64580","urls":{"html":"https://cve.report/CVE-2026-64580","api":"https://cve.report/api/cve/CVE-2026-64580.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64580","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64580"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-08-05 08:16:38","updated_at":"2026-08-05 08:16:38"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/e078da1b4e11390cff3201c19a9a1fe70c5b934f","name":"https://git.kernel.org/stable/c/e078da1b4e11390cff3201c19a9a1fe70c5b934f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/df6856c2dda9187601d29b5fbd7a81b3b178cedf","name":"https://git.kernel.org/stable/c/df6856c2dda9187601d29b5fbd7a81b3b178cedf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/136992de9bb91871084ae52d172610541c76e4d2","name":"https://git.kernel.org/stable/c/136992de9bb91871084ae52d172610541c76e4d2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ff636d7b7cba6dea82ecf580415ea57f2c1a11b6","name":"https://git.kernel.org/stable/c/ff636d7b7cba6dea82ecf580415ea57f2c1a11b6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/43de8a49335e611adb271bbd52e84dfbc11fc185","name":"https://git.kernel.org/stable/c/43de8a49335e611adb271bbd52e84dfbc11fc185","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64580","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64580","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 84c4a9dfbf430861e7588d95ae3ff61535dca351 df6856c2dda9187601d29b5fbd7a81b3b178cedf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 84c4a9dfbf430861e7588d95ae3ff61535dca351 43de8a49335e611adb271bbd52e84dfbc11fc185 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 84c4a9dfbf430861e7588d95ae3ff61535dca351 ff636d7b7cba6dea82ecf580415ea57f2c1a11b6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 84c4a9dfbf430861e7588d95ae3ff61535dca351 e078da1b4e11390cff3201c19a9a1fe70c5b934f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 84c4a9dfbf430861e7588d95ae3ff61535dca351 136992de9bb91871084ae52d172610541c76e4d2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a7e22d0c0e81dde129a51ee413644124f4b59954 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 01b0d887f67a388fb2a658ee2bdd74e5ba146818 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a98124aac0b5adc5de8ae54f11322781cb4d85c3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e27b7bee743d921f037b1da6f071237345bef7c1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.0.79 3.1 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.2.46 3.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.4.46 3.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.9.3 3.10 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.10","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.10 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.148 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.101 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.42 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.6 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc4 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64580","cve":"CVE-2026-64580","epss":"0.001560000","percentile":"0.052690000","score_date":"2026-08-05","updated_at":"2026-08-06 00:00:32"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv6/xfrm6_policy.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"df6856c2dda9187601d29b5fbd7a81b3b178cedf","status":"affected","version":"84c4a9dfbf430861e7588d95ae3ff61535dca351","versionType":"git"},{"lessThan":"43de8a49335e611adb271bbd52e84dfbc11fc185","status":"affected","version":"84c4a9dfbf430861e7588d95ae3ff61535dca351","versionType":"git"},{"lessThan":"ff636d7b7cba6dea82ecf580415ea57f2c1a11b6","status":"affected","version":"84c4a9dfbf430861e7588d95ae3ff61535dca351","versionType":"git"},{"lessThan":"e078da1b4e11390cff3201c19a9a1fe70c5b934f","status":"affected","version":"84c4a9dfbf430861e7588d95ae3ff61535dca351","versionType":"git"},{"lessThan":"136992de9bb91871084ae52d172610541c76e4d2","status":"affected","version":"84c4a9dfbf430861e7588d95ae3ff61535dca351","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"},{"lessThan":"3.1","status":"affected","version":"3.0.79","versionType":"semver"},{"lessThan":"3.3","status":"affected","version":"3.2.46","versionType":"semver"},{"lessThan":"3.5","status":"affected","version":"3.4.46","versionType":"semver"},{"lessThan":"3.10","status":"affected","version":"3.9.3","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/xfrm6_policy.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.10"},{"lessThan":"3.10","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.148","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc4","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.148","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.101","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.42","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.6","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc4","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0.79","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2.46","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4.46","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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   ..."}],"providerMetadata":{"dateUpdated":"2026-08-05T08:09:34.946Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/df6856c2dda9187601d29b5fbd7a81b3b178cedf"},{"url":"https://git.kernel.org/stable/c/43de8a49335e611adb271bbd52e84dfbc11fc185"},{"url":"https://git.kernel.org/stable/c/ff636d7b7cba6dea82ecf580415ea57f2c1a11b6"},{"url":"https://git.kernel.org/stable/c/e078da1b4e11390cff3201c19a9a1fe70c5b934f"},{"url":"https://git.kernel.org/stable/c/136992de9bb91871084ae52d172610541c76e4d2"}],"title":"xfrm6: clear dst.dev on error to avoid double netdev_put in xfrm6_fill_dst()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64580","datePublished":"2026-08-05T08:09:34.946Z","dateReserved":"2026-07-19T15:36:31.798Z","dateUpdated":"2026-08-05T08:09:34.946Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-05 08:16:38","lastModifiedDate":"2026-08-05 08:16:38","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64580","Ordinal":"1","Title":"xfrm6: clear dst.dev on error to avoid double netdev_put in xfrm","CVE":"CVE-2026-64580","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64580","Ordinal":"1","NoteData":"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   ...","Type":"Description","Title":"xfrm6: clear dst.dev on error to avoid double netdev_put in xfrm"}]}}}