{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-52574", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-02T21:55:42.568Z", "datePublished": "2024-03-02T21:59:43.271Z", "dateUpdated": "2026-08-05T09:10:28.113Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:10:28.113Z" }, "descriptions": [ { "lang": "en", "value": "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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is triggered by local rtnetlink configuration (creating a team device and enslaving nlmon then vlan ports via IFLA_MASTER), not by processing unauthenticated remote packets; subsequent hard_header calls occur on that locally configured device.\nAC:L - The reproducer topology is fully attacker-controlled and deterministically installs vlan_header_ops on the team device when changing type from non-ether to ether; no race or external timing condition is required.\nPR:L - Creating team/dummy/vlan/nlmon devices and enslaving them requires CAP_NET_ADMIN enforced via netlink_net_capable() in the network namespace's user_ns, which an unprivileged user obtains with unshare -Urn; GENL_ADMIN_PERM (init userns) is not required for this path.\nUI:N - The attacker configures the devices and triggers packet transmission (e.g., IPv6 MLD on bring-up or local socket send) without any action by another user.\nS:U - Impact remains within the same kernel security authority (local DoS / type-confusion privilege impact); there is no VM escape, IOMMU bypass, or other cross-boundary effect.\nC:H - Installing vlan_header_ops on a non-vlan team device is header_ops type confusion: vlan_dev_hard_header interprets team private data as vlan_dev_priv (including pointer walks such as egress_priority_map), which can expose kernel memory; scored high per type-confusion guidance and CVE-2026-31502.\nI:H - Type confusion in kernel header_ops callback dispatch misinterprets object layout and can yield write/control-flow primitives beyond the observed crash; kernel type confusion is scored as high integrity impact.\nA:H - The demonstrated failure mode is a kernel NULL pointer dereference oops in vlan_dev_hard_header when the confused real_dev/layout is used, which is a high availability impact." } ] } ], "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.c", "include/linux/if_team.h" ], "versions": [ { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "lessThan": "1779eb51b9cc628cee551f252701a85a2a50a457", "status": "affected", "versionType": "git" }, { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "lessThan": "a7fb47b9711101d2405b0eb1276fb1f9b9b270c7", "status": "affected", "versionType": "git" }, { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "lessThan": "c5f6478686bb45f453031594ae19b6c9723a780d", "status": "affected", "versionType": "git" }, { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "lessThan": "b44dd92e2afd89eb6e9d27616858e72a67bdc1a7", "status": "affected", "versionType": "git" }, { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "lessThan": "cd05eec2ee0cc396813a32ef675634e403748255", "status": "affected", "versionType": "git" }, { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "lessThan": "2f0acb0736ecc3eb85dc80ad2790d634dcb10b58", "status": "affected", "versionType": "git" }, { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "lessThan": "cac50d9f5d876be32cb9aa21c74018468900284d", "status": "affected", "versionType": "git" }, { "version": "1d76efe1577b4323609b1bcbfafa8b731eda071a", "lessThan": "492032760127251e5540a5716a70996bacf2a3fd", "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.c", "include/linux/if_team.h" ], "versions": [ { "version": "3.7", "status": "affected" }, { "version": "0", "lessThan": "3.7", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.327", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.296", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.258", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.198", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.134", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.56", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.5.6", "lessThanOrEqual": "6.5.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6", "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": "4.14.327" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "4.19.296" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "5.4.258" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "5.10.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "5.15.134" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.1.56" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.5.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.6" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/1779eb51b9cc628cee551f252701a85a2a50a457" }, { "url": "https://git.kernel.org/stable/c/a7fb47b9711101d2405b0eb1276fb1f9b9b270c7" }, { "url": "https://git.kernel.org/stable/c/c5f6478686bb45f453031594ae19b6c9723a780d" }, { "url": "https://git.kernel.org/stable/c/b44dd92e2afd89eb6e9d27616858e72a67bdc1a7" }, { "url": "https://git.kernel.org/stable/c/cd05eec2ee0cc396813a32ef675634e403748255" }, { "url": "https://git.kernel.org/stable/c/2f0acb0736ecc3eb85dc80ad2790d634dcb10b58" }, { "url": "https://git.kernel.org/stable/c/cac50d9f5d876be32cb9aa21c74018468900284d" }, { "url": "https://git.kernel.org/stable/c/492032760127251e5540a5716a70996bacf2a3fd" } ], "title": "team: fix null-ptr-deref when team device type is changed", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CISA ADP Vulnrichment", "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2023-52574", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-03-06T20:45:03.463636Z" } } } ], "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:22:44.896Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T23:03:20.914Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/1779eb51b9cc628cee551f252701a85a2a50a457", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/a7fb47b9711101d2405b0eb1276fb1f9b9b270c7", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/c5f6478686bb45f453031594ae19b6c9723a780d", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/b44dd92e2afd89eb6e9d27616858e72a67bdc1a7", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/cd05eec2ee0cc396813a32ef675634e403748255", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/2f0acb0736ecc3eb85dc80ad2790d634dcb10b58", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/cac50d9f5d876be32cb9aa21c74018468900284d", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/492032760127251e5540a5716a70996bacf2a3fd", "tags": [ "x_transferred" ] } ] } ] } }