{"api_version":"1","generated_at":"2026-04-23T10:43:18+00:00","cve":"CVE-2026-31502","urls":{"html":"https://cve.report/CVE-2026-31502","api":"https://cve.report/api/cve/CVE-2026-31502.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31502","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31502"},"summary":{"title":"team: fix header_ops type confusion with non-Ethernet ports","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nteam: fix header_ops type confusion with non-Ethernet ports\n\nSimilar to commit 950803f72547 (\"bonding: fix type confusion in\nbond_setup_by_slave()\") team has the same class of header_ops type\nconfusion.\n\nFor non-Ethernet ports, team_setup_by_port() copies port_dev->header_ops\ndirectly. When the team device later calls dev_hard_header() or\ndev_parse_header(), these callbacks can run with the team net_device\ninstead of the real lower device, so netdev_priv(dev) is interpreted as\nthe wrong private type and can crash.\n\nThe syzbot report shows a crash in bond_header_create(), but the root\ncause is in team: the topology is gre -> bond -> team, and team calls\nthe inherited header_ops with its own net_device instead of the lower\ndevice, so bond_header_create() receives a team device and interprets\nnetdev_priv() as bonding private data, causing a type confusion crash.\n\nFix this by introducing team header_ops wrappers for create/parse,\nselecting a team port under RCU, and calling the lower device callbacks\nwith port->dev, so each callback always sees the correct net_device\ncontext.\n\nAlso pass the selected lower device to the lower parse callback, so\nrecursion is bounded in stacked non-Ethernet topologies and parse\ncallbacks always run with the correct device context.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-22 14:16:48","updated_at":"2026-04-22 14:16:48"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/425000dbf17373a4ab8be9428f5dc055ef870a56","name":"https://git.kernel.org/stable/c/425000dbf17373a4ab8be9428f5dc055ef870a56","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6d3161fa3eee64d46b766fb0db33ec7f300ef52d","name":"https://git.kernel.org/stable/c/6d3161fa3eee64d46b766fb0db33ec7f300ef52d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0a7468ed49a6b65d34abcc6eb60e15f7f6d34da0","name":"https://git.kernel.org/stable/c/0a7468ed49a6b65d34abcc6eb60e15f7f6d34da0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/20491d384d973a63fbdaf7a71e38d69b0659ea55","name":"https://git.kernel.org/stable/c/20491d384d973a63fbdaf7a71e38d69b0659ea55","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31502","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31502","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1d76efe1577b4323609b1bcbfafa8b731eda071a 6d3161fa3eee64d46b766fb0db33ec7f300ef52d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1d76efe1577b4323609b1bcbfafa8b731eda071a 0a7468ed49a6b65d34abcc6eb60e15f7f6d34da0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1d76efe1577b4323609b1bcbfafa8b731eda071a 20491d384d973a63fbdaf7a71e38d69b0659ea55 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1d76efe1577b4323609b1bcbfafa8b731eda071a 425000dbf17373a4ab8be9428f5dc055ef870a56 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 6.12.80 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.21 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.11 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * 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":"6d3161fa3eee64d46b766fb0db33ec7f300ef52d","status":"affected","version":"1d76efe1577b4323609b1bcbfafa8b731eda071a","versionType":"git"},{"lessThan":"0a7468ed49a6b65d34abcc6eb60e15f7f6d34da0","status":"affected","version":"1d76efe1577b4323609b1bcbfafa8b731eda071a","versionType":"git"},{"lessThan":"20491d384d973a63fbdaf7a71e38d69b0659ea55","status":"affected","version":"1d76efe1577b4323609b1bcbfafa8b731eda071a","versionType":"git"},{"lessThan":"425000dbf17373a4ab8be9428f5dc055ef870a56","status":"affected","version":"1d76efe1577b4323609b1bcbfafa8b731eda071a","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":"6.12.*","status":"unaffected","version":"6.12.80","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.21","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.80","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.21","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.11","versionStartIncluding":"3.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"3.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nteam: fix header_ops type confusion with non-Ethernet ports\n\nSimilar to commit 950803f72547 (\"bonding: fix type confusion in\nbond_setup_by_slave()\") team has the same class of header_ops type\nconfusion.\n\nFor non-Ethernet ports, team_setup_by_port() copies port_dev->header_ops\ndirectly. When the team device later calls dev_hard_header() or\ndev_parse_header(), these callbacks can run with the team net_device\ninstead of the real lower device, so netdev_priv(dev) is interpreted as\nthe wrong private type and can crash.\n\nThe syzbot report shows a crash in bond_header_create(), but the root\ncause is in team: the topology is gre -> bond -> team, and team calls\nthe inherited header_ops with its own net_device instead of the lower\ndevice, so bond_header_create() receives a team device and interprets\nnetdev_priv() as bonding private data, causing a type confusion crash.\n\nFix this by introducing team header_ops wrappers for create/parse,\nselecting a team port under RCU, and calling the lower device callbacks\nwith port->dev, so each callback always sees the correct net_device\ncontext.\n\nAlso pass the selected lower device to the lower parse callback, so\nrecursion is bounded in stacked non-Ethernet topologies and parse\ncallbacks always run with the correct device context."}],"providerMetadata":{"dateUpdated":"2026-04-22T13:54:22.481Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/6d3161fa3eee64d46b766fb0db33ec7f300ef52d"},{"url":"https://git.kernel.org/stable/c/0a7468ed49a6b65d34abcc6eb60e15f7f6d34da0"},{"url":"https://git.kernel.org/stable/c/20491d384d973a63fbdaf7a71e38d69b0659ea55"},{"url":"https://git.kernel.org/stable/c/425000dbf17373a4ab8be9428f5dc055ef870a56"}],"title":"team: fix header_ops type confusion with non-Ethernet ports","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31502","datePublished":"2026-04-22T13:54:22.481Z","dateReserved":"2026-03-09T15:48:24.104Z","dateUpdated":"2026-04-22T13:54:22.481Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-22 14:16:48","lastModifiedDate":"2026-04-22 14:16:48","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31502","Ordinal":"1","Title":"team: fix header_ops type confusion with non-Ethernet ports","CVE":"CVE-2026-31502","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31502","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nteam: fix header_ops type confusion with non-Ethernet ports\n\nSimilar to commit 950803f72547 (\"bonding: fix type confusion in\nbond_setup_by_slave()\") team has the same class of header_ops type\nconfusion.\n\nFor non-Ethernet ports, team_setup_by_port() copies port_dev->header_ops\ndirectly. When the team device later calls dev_hard_header() or\ndev_parse_header(), these callbacks can run with the team net_device\ninstead of the real lower device, so netdev_priv(dev) is interpreted as\nthe wrong private type and can crash.\n\nThe syzbot report shows a crash in bond_header_create(), but the root\ncause is in team: the topology is gre -> bond -> team, and team calls\nthe inherited header_ops with its own net_device instead of the lower\ndevice, so bond_header_create() receives a team device and interprets\nnetdev_priv() as bonding private data, causing a type confusion crash.\n\nFix this by introducing team header_ops wrappers for create/parse,\nselecting a team port under RCU, and calling the lower device callbacks\nwith port->dev, so each callback always sees the correct net_device\ncontext.\n\nAlso pass the selected lower device to the lower parse callback, so\nrecursion is bounded in stacked non-Ethernet topologies and parse\ncallbacks always run with the correct device context.","Type":"Description","Title":"team: fix header_ops type confusion with non-Ethernet ports"}]}}}