{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-52574", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-52574", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2024-03-02T21:59:43.271Z", "updatedAt": "2026-08-05T09:10:28.113Z", "importedAt": "2026-10-24T01:57:03.413Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "team: fix null-ptr-deref when team device type is changed", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nteam: fix null-ptr-deref when team device type is changed\n\nGet a null-ptr-deref bug as follows with reproducer [1].\n\nBUG: kernel NULL pointer dereference, address: 0000000000000228\n...\nRIP: 0010:vlan_dev_hard_header+0x35/0x140 [8021q]\n...\nCall Trace:\n \n ? __die+0x24/0x70\n ? page_fault_oops+0x82/0x150\n ? exc_page_fault+0x69/0x150\n ? asm_exc_page_fault+0x26/0x30\n ? vlan_dev_hard_header+0x35/0x140 [8021q]\n ? vlan_dev_hard_header+0x8e/0x140 [8021q]\n neigh_connected_output+0xb2/0x100\n ip6_finish_output2+0x1cb/0x520\n ? nf_hook_slow+0x43/0xc0\n ? ip6_mtu+0x46/0x80\n ip6_finish_output+0x2a/0xb0\n mld_sendpack+0x18f/0x250\n mld_ifc_work+0x39/0x160\n process_one_work+0x1e6/0x3f0\n worker_thread+0x4d/0x2f0\n ? __pfx_worker_thread+0x10/0x10\n kthread+0xe5/0x120\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x34/0x50\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1b/0x30\n\n[1]\n$ teamd -t team0 -d -c '{\"runner\": {\"name\": \"loadbalance\"}}'\n$ ip link add name t-dummy type dummy\n$ ip link add link t-dummy name t-dummy.100 type vlan id 100\n$ ip link add name t-nlmon type nlmon\n$ ip link set t-nlmon master team0\n$ ip link set t-nlmon nomaster\n$ ip link set t-dummy up\n$ ip link set team0 up\n$ ip link set t-dummy.100 down\n$ ip link set t-dummy.100 master team0\n\nWhen enslave a vlan device to team device and team device type is changed\nfrom non-ether to ether, header_ops of team device is changed to\nvlan_header_ops. That is incorrect and will trigger null-ptr-deref\nfor vlan->real_dev in vlan_dev_hard_header() because team device is not\na vlan device.\n\nCache eth_header_ops in team_setup(), then assign cached header_ops to\nheader_ops of team net device when its type is changed from non-ether\nto ether to fix the bug.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "status": "affected", "versionType": "git", "lessThan": "1779eb51b9cc628cee551f252701a85a2a50a457" }, { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "status": "affected", "versionType": "git", "lessThan": "a7fb47b9711101d2405b0eb1276fb1f9b9b270c7" }, { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "status": "affected", "versionType": "git", "lessThan": "c5f6478686bb45f453031594ae19b6c9723a780d" }, { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "status": "affected", "versionType": "git", "lessThan": "b44dd92e2afd89eb6e9d27616858e72a67bdc1a7" }, { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "status": "affected", "versionType": "git", "lessThan": "cd05eec2ee0cc396813a32ef675634e403748255" }, { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "status": "affected", "versionType": "git", "lessThan": "2f0acb0736ecc3eb85dc80ad2790d634dcb10b58" }, { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "status": "affected", "versionType": "git", "lessThan": "cac50d9f5d876be32cb9aa21c74018468900284d" }, { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "status": "affected", "versionType": "git", "lessThan": "492032760127251e5540a5716a70996bacf2a3fd" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.7", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.7" }, { "version": "4.14.327", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.296", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.258", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.198", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.134", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.56", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.5.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.5.*" }, { "version": "6.6", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }