{"api_version":"1","generated_at":"2026-10-27T07:58:22+00:00","cve":"CVE-2026-99027","urls":{"html":"https://cve.report/CVE-2026-99027","api":"https://cve.report/api/cve/CVE-2026-99027.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-99027","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-99027"},"summary":{"title":"net: team: stop reusing skb after queue override","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: team: stop reusing skb after queue override\n\nA nonzero dev_queue_xmit() result does not return ownership of the skb.\nWhen an override port's qdisc drops it, the queue override helper used to\ntry another port or the mode transmit op with the freed skb.\n\nReturn the handoff decision separately from transmit success. Select only\nthe first override port under RCU and stop after handing it the skb,\nregardless of the lower transmit result. Keep the existing success and\ndrop accounting.\n\n  BUG: KASAN: slab-use-after-free in sk_skb_reason_drop\n  Write of size 4 by task poc/5040\n  sk_skb_reason_drop (net/core/skbuff.c:1240)\n  dev_kfree_skb_any_reason (net/core/dev.c:3470)\n  ab_transmit (drivers/net/team/team_mode_activebackup.c:49)\n  team_xmit (drivers/net/team/team_core.c:1849)\n  __dev_direct_xmit (net/core/dev.c:4934)\n  Freed by task 5040:\n  __tcf_kfree_skb_list (net/sched/sch_generic.c:43)\n  __dev_queue_xmit (net/core/dev.c:4831)\n  team_xmit (drivers/net/team/team_core.c:1846)\n  Kernel panic - not syncing: KASAN: panic_on_warn set ...","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-23 13:17:25","updated_at":"2026-10-23 13:17:25"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/b7454f1940c5e6d92e753853c476a769e452f30a","name":"https://git.kernel.org/stable/c/b7454f1940c5e6d92e753853c476a769e452f30a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bed63353341d2d44cbad034001dd382cfe3a3892","name":"https://git.kernel.org/stable/c/bed63353341d2d44cbad034001dd382cfe3a3892","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/07a48cfceb3d0555710a9acb87c949500a7b4523","name":"https://git.kernel.org/stable/c/07a48cfceb3d0555710a9acb87c949500a7b4523","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b21f20320fa2f3c683e3334d70de6bfd172e544a","name":"https://git.kernel.org/stable/c/b21f20320fa2f3c683e3334d70de6bfd172e544a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e","name":"https://git.kernel.org/stable/c/0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-99027","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99027","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8ff5105a2b9dd0ba596719b165c1827d101e5f1a b21f20320fa2f3c683e3334d70de6bfd172e544a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8ff5105a2b9dd0ba596719b165c1827d101e5f1a 07a48cfceb3d0555710a9acb87c949500a7b4523 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8ff5105a2b9dd0ba596719b165c1827d101e5f1a 0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8ff5105a2b9dd0ba596719b165c1827d101e5f1a bed63353341d2d44cbad034001dd382cfe3a3892 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8ff5105a2b9dd0ba596719b165c1827d101e5f1a b7454f1940c5e6d92e753853c476a769e452f30a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.7","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.160 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.114 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.57 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.11 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * 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/team/team_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"b21f20320fa2f3c683e3334d70de6bfd172e544a","status":"affected","version":"8ff5105a2b9dd0ba596719b165c1827d101e5f1a","versionType":"git"},{"lessThan":"07a48cfceb3d0555710a9acb87c949500a7b4523","status":"affected","version":"8ff5105a2b9dd0ba596719b165c1827d101e5f1a","versionType":"git"},{"lessThan":"0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e","status":"affected","version":"8ff5105a2b9dd0ba596719b165c1827d101e5f1a","versionType":"git"},{"lessThan":"bed63353341d2d44cbad034001dd382cfe3a3892","status":"affected","version":"8ff5105a2b9dd0ba596719b165c1827d101e5f1a","versionType":"git"},{"lessThan":"b7454f1940c5e6d92e753853c476a769e452f30a","status":"affected","version":"8ff5105a2b9dd0ba596719b165c1827d101e5f1a","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/team/team_core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.7"},{"lessThan":"3.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.160","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.114","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.57","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.160","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.114","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.57","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.11","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"3.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: team: stop reusing skb after queue override\n\nA nonzero dev_queue_xmit() result does not return ownership of the skb.\nWhen an override port's qdisc drops it, the queue override helper used to\ntry another port or the mode transmit op with the freed skb.\n\nReturn the handoff decision separately from transmit success. Select only\nthe first override port under RCU and stop after handing it the skb,\nregardless of the lower transmit result. Keep the existing success and\ndrop accounting.\n\n  BUG: KASAN: slab-use-after-free in sk_skb_reason_drop\n  Write of size 4 by task poc/5040\n  sk_skb_reason_drop (net/core/skbuff.c:1240)\n  dev_kfree_skb_any_reason (net/core/dev.c:3470)\n  ab_transmit (drivers/net/team/team_mode_activebackup.c:49)\n  team_xmit (drivers/net/team/team_core.c:1849)\n  __dev_direct_xmit (net/core/dev.c:4934)\n  Freed by task 5040:\n  __tcf_kfree_skb_list (net/sched/sch_generic.c:43)\n  __dev_queue_xmit (net/core/dev.c:4831)\n  team_xmit (drivers/net/team/team_core.c:1846)\n  Kernel panic - not syncing: KASAN: panic_on_warn set ..."}],"providerMetadata":{"dateUpdated":"2026-10-23T12:21:14.896Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/b21f20320fa2f3c683e3334d70de6bfd172e544a"},{"url":"https://git.kernel.org/stable/c/07a48cfceb3d0555710a9acb87c949500a7b4523"},{"url":"https://git.kernel.org/stable/c/0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e"},{"url":"https://git.kernel.org/stable/c/bed63353341d2d44cbad034001dd382cfe3a3892"},{"url":"https://git.kernel.org/stable/c/b7454f1940c5e6d92e753853c476a769e452f30a"}],"title":"net: team: stop reusing skb after queue override","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-99027","datePublished":"2026-10-23T12:21:14.896Z","dateReserved":"2026-09-25T10:25:14.386Z","dateUpdated":"2026-10-23T12:21:14.896Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-23 13:17:25","lastModifiedDate":"2026-10-23 13:17:25","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"99027","Ordinal":"1","Title":"net: team: stop reusing skb after queue override","CVE":"CVE-2026-99027","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"99027","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: team: stop reusing skb after queue override\n\nA nonzero dev_queue_xmit() result does not return ownership of the skb.\nWhen an override port's qdisc drops it, the queue override helper used to\ntry another port or the mode transmit op with the freed skb.\n\nReturn the handoff decision separately from transmit success. Select only\nthe first override port under RCU and stop after handing it the skb,\nregardless of the lower transmit result. Keep the existing success and\ndrop accounting.\n\n  BUG: KASAN: slab-use-after-free in sk_skb_reason_drop\n  Write of size 4 by task poc/5040\n  sk_skb_reason_drop (net/core/skbuff.c:1240)\n  dev_kfree_skb_any_reason (net/core/dev.c:3470)\n  ab_transmit (drivers/net/team/team_mode_activebackup.c:49)\n  team_xmit (drivers/net/team/team_core.c:1849)\n  __dev_direct_xmit (net/core/dev.c:4934)\n  Freed by task 5040:\n  __tcf_kfree_skb_list (net/sched/sch_generic.c:43)\n  __dev_queue_xmit (net/core/dev.c:4831)\n  team_xmit (drivers/net/team/team_core.c:1846)\n  Kernel panic - not syncing: KASAN: panic_on_warn set ...","Type":"Description","Title":"net: team: stop reusing skb after queue override"}]}}}