{"api_version":"1","generated_at":"2026-08-23T20:25:30+00:00","cve":"CVE-2026-74615","urls":{"html":"https://cve.report/CVE-2026-74615","api":"https://cve.report/api/cve/CVE-2026-74615.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74615","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74615"},"summary":{"title":"vxlan: do not arm the ageing timer on a device that is down","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: do not arm the ageing timer on a device that is down\n\nvxlan_changelink() arms vxlan->age_timer whenever the requested ageing\ninterval differs from the configured one:\n\n\tif (conf.age_interval != vxlan->cfg.age_interval)\n\t\tmod_timer(&vxlan->age_timer, jiffies);\n\nThere is no netif_running() test, so the timer is armed even on a device\nthat was never brought up.  The only synchronous cancel in the driver is\nthe timer_delete_sync() in vxlan_stop(), which is .ndo_stop.\nnetif_close_many() drops devices without IFF_UP before\n__dev_close_many() runs, so that cancel is skipped for such a device.\n\nvxlan_setup() sets dev->needs_free_netdev = true and age_timer is a\nmember of struct vxlan_dev, so free_netdev() releases the allocation the\ntimer lives in while it is still queued on a timer_base.\nexpire_timers() unlinks the entry before it loads timer->function, so\nthe timer core writes through the freed object's list pointers:\n\n  BUG: KASAN: slab-use-after-free in __run_timers+0x208/0x654\n  Write of size 8 at addr ffff00001adace68 by task true/192\n   __asan_store8+0x84/0xac\n   __run_timers+0x208/0x654\n   run_timer_softirq+0x154/0x18c\n  Allocated by task 189:\n   alloc_netdev_mqs+0x64/0x720\n   rtnl_create_link+0x4ac/0x520\n   rtnl_newlink+0x758/0xd00\n  Freed by task 191:\n   netdev_release+0x40/0x58\n   netdev_run_todo+0x4a4/0x8c0\n   rtnl_dellink+0x200/0x4e8\n\nThe rtnl operations involved are netns-scoped, so an unprivileged user\ncan perform them in a new user and network namespace.\n\nArming the timer on a down device never had an effect: vxlan_cleanup()\nreturns early on !netif_running(), and vxlan_open() arms the timer for\nany non-zero interval once the device is brought up.  Add the missing\ntest.\n\nDiscovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:34","updated_at":"2026-08-22 16:16:34"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9dc561f0522c35bdd66e0646a748814a138ec4ca","name":"https://git.kernel.org/stable/c/9dc561f0522c35bdd66e0646a748814a138ec4ca","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b37971686ec59fb027fa4910ba16805e68fddb97","name":"https://git.kernel.org/stable/c/b37971686ec59fb027fa4910ba16805e68fddb97","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6b4119af544996a545cf84b16f1dbce829ba0de8","name":"https://git.kernel.org/stable/c/6b4119af544996a545cf84b16f1dbce829ba0de8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/be44d79d14d7f9ae7c8ffb7272142005341b5123","name":"https://git.kernel.org/stable/c/be44d79d14d7f9ae7c8ffb7272142005341b5123","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/46bb297ad77680e009244f067f27d51cf5b8c7cf","name":"https://git.kernel.org/stable/c/46bb297ad77680e009244f067f27d51cf5b8c7cf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/619dd29045e439d0b0f8c6d4fec1af447a050680","name":"https://git.kernel.org/stable/c/619dd29045e439d0b0f8c6d4fec1af447a050680","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/26c179d47403d2f919ee914cc02c31d896b59fee","name":"https://git.kernel.org/stable/c/26c179d47403d2f919ee914cc02c31d896b59fee","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6b095e99b9e67ea31f0c4b00260e010898253519","name":"https://git.kernel.org/stable/c/6b095e99b9e67ea31f0c4b00260e010898253519","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74615","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74615","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 40051c4dcad5b374156ad9cceae8d15c0ef1cb95 be44d79d14d7f9ae7c8ffb7272142005341b5123 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 40051c4dcad5b374156ad9cceae8d15c0ef1cb95 26c179d47403d2f919ee914cc02c31d896b59fee git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 40051c4dcad5b374156ad9cceae8d15c0ef1cb95 9dc561f0522c35bdd66e0646a748814a138ec4ca git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 40051c4dcad5b374156ad9cceae8d15c0ef1cb95 619dd29045e439d0b0f8c6d4fec1af447a050680 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 40051c4dcad5b374156ad9cceae8d15c0ef1cb95 6b095e99b9e67ea31f0c4b00260e010898253519 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 40051c4dcad5b374156ad9cceae8d15c0ef1cb95 46bb297ad77680e009244f067f27d51cf5b8c7cf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 40051c4dcad5b374156ad9cceae8d15c0ef1cb95 6b4119af544996a545cf84b16f1dbce829ba0de8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 40051c4dcad5b374156ad9cceae8d15c0ef1cb95 b37971686ec59fb027fa4910ba16805e68fddb97 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.265 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.216 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.152 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.104 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/vxlan/vxlan_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"be44d79d14d7f9ae7c8ffb7272142005341b5123","status":"affected","version":"40051c4dcad5b374156ad9cceae8d15c0ef1cb95","versionType":"git"},{"lessThan":"26c179d47403d2f919ee914cc02c31d896b59fee","status":"affected","version":"40051c4dcad5b374156ad9cceae8d15c0ef1cb95","versionType":"git"},{"lessThan":"9dc561f0522c35bdd66e0646a748814a138ec4ca","status":"affected","version":"40051c4dcad5b374156ad9cceae8d15c0ef1cb95","versionType":"git"},{"lessThan":"619dd29045e439d0b0f8c6d4fec1af447a050680","status":"affected","version":"40051c4dcad5b374156ad9cceae8d15c0ef1cb95","versionType":"git"},{"lessThan":"6b095e99b9e67ea31f0c4b00260e010898253519","status":"affected","version":"40051c4dcad5b374156ad9cceae8d15c0ef1cb95","versionType":"git"},{"lessThan":"46bb297ad77680e009244f067f27d51cf5b8c7cf","status":"affected","version":"40051c4dcad5b374156ad9cceae8d15c0ef1cb95","versionType":"git"},{"lessThan":"6b4119af544996a545cf84b16f1dbce829ba0de8","status":"affected","version":"40051c4dcad5b374156ad9cceae8d15c0ef1cb95","versionType":"git"},{"lessThan":"b37971686ec59fb027fa4910ba16805e68fddb97","status":"affected","version":"40051c4dcad5b374156ad9cceae8d15c0ef1cb95","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/vxlan/vxlan_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.0"},{"lessThan":"5.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.265","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.216","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.152","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.104","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.265","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.216","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.152","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.104","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"5.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: do not arm the ageing timer on a device that is down\n\nvxlan_changelink() arms vxlan->age_timer whenever the requested ageing\ninterval differs from the configured one:\n\n\tif (conf.age_interval != vxlan->cfg.age_interval)\n\t\tmod_timer(&vxlan->age_timer, jiffies);\n\nThere is no netif_running() test, so the timer is armed even on a device\nthat was never brought up.  The only synchronous cancel in the driver is\nthe timer_delete_sync() in vxlan_stop(), which is .ndo_stop.\nnetif_close_many() drops devices without IFF_UP before\n__dev_close_many() runs, so that cancel is skipped for such a device.\n\nvxlan_setup() sets dev->needs_free_netdev = true and age_timer is a\nmember of struct vxlan_dev, so free_netdev() releases the allocation the\ntimer lives in while it is still queued on a timer_base.\nexpire_timers() unlinks the entry before it loads timer->function, so\nthe timer core writes through the freed object's list pointers:\n\n  BUG: KASAN: slab-use-after-free in __run_timers+0x208/0x654\n  Write of size 8 at addr ffff00001adace68 by task true/192\n   __asan_store8+0x84/0xac\n   __run_timers+0x208/0x654\n   run_timer_softirq+0x154/0x18c\n  Allocated by task 189:\n   alloc_netdev_mqs+0x64/0x720\n   rtnl_create_link+0x4ac/0x520\n   rtnl_newlink+0x758/0xd00\n  Freed by task 191:\n   netdev_release+0x40/0x58\n   netdev_run_todo+0x4a4/0x8c0\n   rtnl_dellink+0x200/0x4e8\n\nThe rtnl operations involved are netns-scoped, so an unprivileged user\ncan perform them in a new user and network namespace.\n\nArming the timer on a down device never had an effect: vxlan_cleanup()\nreturns early on !netif_running(), and vxlan_open() arms the timer for\nany non-zero interval once the device is brought up.  Add the missing\ntest.\n\nDiscovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>"}],"providerMetadata":{"dateUpdated":"2026-08-22T15:32:00.588Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/be44d79d14d7f9ae7c8ffb7272142005341b5123"},{"url":"https://git.kernel.org/stable/c/26c179d47403d2f919ee914cc02c31d896b59fee"},{"url":"https://git.kernel.org/stable/c/9dc561f0522c35bdd66e0646a748814a138ec4ca"},{"url":"https://git.kernel.org/stable/c/619dd29045e439d0b0f8c6d4fec1af447a050680"},{"url":"https://git.kernel.org/stable/c/6b095e99b9e67ea31f0c4b00260e010898253519"},{"url":"https://git.kernel.org/stable/c/46bb297ad77680e009244f067f27d51cf5b8c7cf"},{"url":"https://git.kernel.org/stable/c/6b4119af544996a545cf84b16f1dbce829ba0de8"},{"url":"https://git.kernel.org/stable/c/b37971686ec59fb027fa4910ba16805e68fddb97"}],"title":"vxlan: do not arm the ageing timer on a device that is down","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74615","datePublished":"2026-08-22T15:32:00.588Z","dateReserved":"2026-08-15T05:44:03.920Z","dateUpdated":"2026-08-22T15:32:00.588Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:34","lastModifiedDate":"2026-08-22 16:16:34","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74615","Ordinal":"1","Title":"vxlan: do not arm the ageing timer on a device that is down","CVE":"CVE-2026-74615","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74615","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: do not arm the ageing timer on a device that is down\n\nvxlan_changelink() arms vxlan->age_timer whenever the requested ageing\ninterval differs from the configured one:\n\n\tif (conf.age_interval != vxlan->cfg.age_interval)\n\t\tmod_timer(&vxlan->age_timer, jiffies);\n\nThere is no netif_running() test, so the timer is armed even on a device\nthat was never brought up.  The only synchronous cancel in the driver is\nthe timer_delete_sync() in vxlan_stop(), which is .ndo_stop.\nnetif_close_many() drops devices without IFF_UP before\n__dev_close_many() runs, so that cancel is skipped for such a device.\n\nvxlan_setup() sets dev->needs_free_netdev = true and age_timer is a\nmember of struct vxlan_dev, so free_netdev() releases the allocation the\ntimer lives in while it is still queued on a timer_base.\nexpire_timers() unlinks the entry before it loads timer->function, so\nthe timer core writes through the freed object's list pointers:\n\n  BUG: KASAN: slab-use-after-free in __run_timers+0x208/0x654\n  Write of size 8 at addr ffff00001adace68 by task true/192\n   __asan_store8+0x84/0xac\n   __run_timers+0x208/0x654\n   run_timer_softirq+0x154/0x18c\n  Allocated by task 189:\n   alloc_netdev_mqs+0x64/0x720\n   rtnl_create_link+0x4ac/0x520\n   rtnl_newlink+0x758/0xd00\n  Freed by task 191:\n   netdev_release+0x40/0x58\n   netdev_run_todo+0x4a4/0x8c0\n   rtnl_dellink+0x200/0x4e8\n\nThe rtnl operations involved are netns-scoped, so an unprivileged user\ncan perform them in a new user and network namespace.\n\nArming the timer on a down device never had an effect: vxlan_cleanup()\nreturns early on !netif_running(), and vxlan_open() arms the timer for\nany non-zero interval once the device is brought up.  Add the missing\ntest.\n\nDiscovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>","Type":"Description","Title":"vxlan: do not arm the ageing timer on a device that is down"}]}}}