CVE-2026-99027

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-99027", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.386Z", "datePublished": "2026-10-23T12:21:14.896Z", "dateUpdated": "2026-10-30T12:41:02.988Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:41:02.988Z"}, "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 ..."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/team/team_core.c"], "versions": [{"version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a", "lessThan": "13be794844e368b4f8e8d33e97efa23c0a1ebaf8", "status": "affected", "versionType": "git"}, {"version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a", "lessThan": "e40846f661075c4c653988363f38e6868bd0a240", "status": "affected", "versionType": "git"}, {"version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a", "lessThan": "eaf49fba9cd054e84906d2416e8662194f763c9e", "status": "affected", "versionType": "git"}, {"version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a", "lessThan": "b21f20320fa2f3c683e3334d70de6bfd172e544a", "status": "affected", "versionType": "git"}, {"version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a", "lessThan": "07a48cfceb3d0555710a9acb87c949500a7b4523", "status": "affected", "versionType": "git"}, {"version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a", "lessThan": "0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e", "status": "affected", "versionType": "git"}, {"version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a", "lessThan": "bed63353341d2d44cbad034001dd382cfe3a3892", "status": "affected", "versionType": "git"}, {"version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a", "lessThan": "b7454f1940c5e6d92e753853c476a769e452f30a", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/team/team_core.c"], "versions": [{"version": "3.7", "status": "affected"}, {"version": "0", "lessThan": "3.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.11", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "7.2.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/13be794844e368b4f8e8d33e97efa23c0a1ebaf8"}, {"url": "https://git.kernel.org/stable/c/e40846f661075c4c653988363f38e6868bd0a240"}, {"url": "https://git.kernel.org/stable/c/eaf49fba9cd054e84906d2416e8662194f763c9e"}, {"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"}}}}

{}

{"affected": [{"affectedData": [{"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": "13be794844e368b4f8e8d33e97efa23c0a1ebaf8", "status": "affected", "version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a", "versionType": "git"}, {"lessThan": "e40846f661075c4c653988363f38e6868bd0a240", "status": "affected", "version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a", "versionType": "git"}, {"lessThan": "eaf49fba9cd054e84906d2416e8662194f763c9e", "status": "affected", "version": "8ff5105a2b9dd0ba596719b165c1827d101e5f1a", "versionType": "git"}, {"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": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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 ..."}], "id": "CVE-2026-99027", "lastModified": "2026-10-30T13:21:39.203", "metrics": {}, "published": "2026-10-23T13:17:25.723", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/07a48cfceb3d0555710a9acb87c949500a7b4523"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/13be794844e368b4f8e8d33e97efa23c0a1ebaf8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b21f20320fa2f3c683e3334d70de6bfd172e544a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b7454f1940c5e6d92e753853c476a769e452f30a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bed63353341d2d44cbad034001dd382cfe3a3892"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e40846f661075c4c653988363f38e6868bd0a240"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eaf49fba9cd054e84906d2416e8662194f763c9e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: team: stop reusing skb after queue override", "id": "2559820", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559820"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: team: stop reusing skb after queue override\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.\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.\nBUG: KASAN: slab-use-after-free in sk_skb_reason_drop\nWrite of size 4 by task poc/5040\nsk_skb_reason_drop (net/core/skbuff.c:1240)\ndev_kfree_skb_any_reason (net/core/dev.c:3470)\nab_transmit (drivers/net/team/team_mode_activebackup.c:49)\nteam_xmit (drivers/net/team/team_core.c:1849)\n__dev_direct_xmit (net/core/dev.c:4934)\nFreed by task 5040:\n__tcf_kfree_skb_list (net/sched/sch_generic.c:43)\n__dev_queue_xmit (net/core/dev.c:4831)\nteam_xmit (drivers/net/team/team_core.c:1846)\nKernel panic - not syncing: KASAN: panic_on_warn set ...", "A flaw was found in the Linux kernel's team network device driver. When a network packet is dropped during a queue override operation, the driver attempts to reuse the freed packet buffer on subsequent transmit attempts. A local attacker could exploit this use-after-free condition to cause a system crash, leading to a Denial of Service (DoS), or potentially execute arbitrary code."], "name": "CVE-2026-99027", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-99027\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-99027\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-99027.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff5105a2b9dd0ba596719b165c1827d101e5f1a,b21f20320fa2f3c683e3334d70de6bfd172e544a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff5105a2b9dd0ba596719b165c1827d101e5f1a,07a48cfceb3d0555710a9acb87c949500a7b4523)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff5105a2b9dd0ba596719b165c1827d101e5f1a,0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff5105a2b9dd0ba596719b165c1827d101e5f1a,bed63353341d2d44cbad034001dd382cfe3a3892)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff5105a2b9dd0ba596719b165c1827d101e5f1a,b7454f1940c5e6d92e753853c476a769e452f30a)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "3.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.160,6.7.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.114,6.13.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.57,6.19.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,7.3.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff5105a2b9dd0ba596719b165c1827d101e5f1a,b21f20320fa2f3c683e3334d70de6bfd172e544a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff5105a2b9dd0ba596719b165c1827d101e5f1a,07a48cfceb3d0555710a9acb87c949500a7b4523)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff5105a2b9dd0ba596719b165c1827d101e5f1a,0c0568c9d35c47dc8e3ef6705d4c35a02bd88c4e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff5105a2b9dd0ba596719b165c1827d101e5f1a,bed63353341d2d44cbad034001dd382cfe3a3892)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ff5105a2b9dd0ba596719b165c1827d101e5f1a,b7454f1940c5e6d92e753853c476a769e452f30a)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "3.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.160,6.7.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.114,6.13.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.57,6.19.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.11,7.3.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-23T15:15:14.433587+00:00", "updated": "2026-10-29T14:30:16.098636+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"]}