{"dataType": "CVE_RECORD", "dataVersion": "5.1", "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": "2024-11-04T14:49:01.619Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T14:49:01.619Z"}, "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 <TASK>\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": [{"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": "1d76efe1577b", "lessThan": "1779eb51b9cc", "status": "affected", "versionType": "git"}, {"version": "1d76efe1577b", "lessThan": "a7fb47b97111", "status": "affected", "versionType": "git"}, {"version": "1d76efe1577b", "lessThan": "c5f6478686bb", "status": "affected", "versionType": "git"}, {"version": "1d76efe1577b", "lessThan": "b44dd92e2afd", "status": "affected", "versionType": "git"}, {"version": "1d76efe1577b", "lessThan": "cd05eec2ee0c", "status": "affected", "versionType": "git"}, {"version": "1d76efe1577b", "lessThan": "2f0acb0736ec", "status": "affected", "versionType": "git"}, {"version": "1d76efe1577b", "lessThan": "cac50d9f5d87", "status": "affected", "versionType": "git"}, {"version": "1d76efe1577b", "lessThan": "492032760127", "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"}]}], "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-9e1c9544281a"}}, "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"]}]}]}}

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"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T23:03:20.914Z"}}, {"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": "2024-05-23T19:01:16.228Z"}, "title": "CISA ADP Vulnrichment"}], "cna": {"title": "team: fix null-ptr-deref when team device type is changed", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1d76efe1577b", "lessThan": "1779eb51b9cc", "versionType": "git"}, {"status": "affected", "version": "1d76efe1577b", "lessThan": "a7fb47b97111", "versionType": "git"}, {"status": "affected", "version": "1d76efe1577b", "lessThan": "c5f6478686bb", "versionType": "git"}, {"status": "affected", "version": "1d76efe1577b", "lessThan": "b44dd92e2afd", "versionType": "git"}, {"status": "affected", "version": "1d76efe1577b", "lessThan": "cd05eec2ee0c", "versionType": "git"}, {"status": "affected", "version": "1d76efe1577b", "lessThan": "2f0acb0736ec", "versionType": "git"}, {"status": "affected", "version": "1d76efe1577b", "lessThan": "cac50d9f5d87", "versionType": "git"}, {"status": "affected", "version": "1d76efe1577b", "lessThan": "492032760127", "versionType": "git"}], "programFiles": ["drivers/net/team/team.c", "include/linux/if_team.h"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.7"}, {"status": "unaffected", "version": "0", "lessThan": "3.7", "versionType": "semver"}, {"status": "unaffected", "version": "4.14.327", "versionType": "semver", "lessThanOrEqual": "4.14.*"}, {"status": "unaffected", "version": "4.19.296", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.258", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.198", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.134", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.56", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.5.6", "versionType": "semver", "lessThanOrEqual": "6.5.*"}, {"status": "unaffected", "version": "6.6", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/team/team.c", "include/linux/if_team.h"], "defaultStatus": "affected"}], "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"}], "x_generator": {"engine": "bippy-9e1c9544281a"}, "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 <TASK>\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."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T12:33:52.493Z"}}}, "cveMetadata": {"cveId": "CVE-2023-52574", "state": "PUBLISHED", "dateUpdated": "2024-11-04T12:33:52.493Z", "dateReserved": "2024-03-02T21:55:42.568Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-03-02T21:59:43.271Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"cveTags": [], "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 <TASK>\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."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: equipo: corrige null-ptr-deref cuando se cambia el tipo de dispositivo del equipo. Obtiene un error null-ptr-deref de la siguiente manera con el reproductor [1]. ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000228... RIP: 0010:vlan_dev_hard_header+0x35/0x140 [8021q]... Seguimiento de llamadas: ? __morir+0x24/0x70 ? page_fault_oops+0x82/0x150? exc_page_fault+0x69/0x150? asm_exc_page_fault+0x26/0x30? vlan_dev_hard_header+0x35/0x140 [8021q] ? vlan_dev_hard_header+0x8e/0x140 [8021q] neigh_connected_output+0xb2/0x100 ip6_finish_output2+0x1cb/0x520 ? nf_hook_slow+0x43/0xc0? ip6_mtu+0x46/0x80 ip6_finish_output+0x2a/0xb0 mld_sendpack+0x18f/0x250 mld_ifc_work+0x39/0x160 Process_one_work+0x1e6/0x3f0 trabajador_thread+0x4d/0x2f0? __pfx_worker_thread+0x10/0x10 kthread+0xe5/0x120 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x34/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 [1] $ teamd -t team0 -d -c '{\"runner\": {\"name\": \"loadbalance\"}}' $ enlace ip agregar nombre t-dummy tipo dummy $ enlace ip agregar enlace t-dummy nombre t-dummy.100 tipo vlan id 100 $ enlace ip agregar nombre t-nlmon tipo nlmon $ conjunto de enlaces ip t-nlmon master team0 $ conjunto de enlaces ip t-nlmon nomaster $ conjunto de enlaces ip t- dummy up $ ip link set team0 up $ ip link set t-dummy.100 down $ ip link set t-dummy.100 master team0 Cuando se esclaviza un dispositivo VLAN a un dispositivo de equipo y el tipo de dispositivo de equipo se cambia de no ether a ether, header_ops del dispositivo del equipo se cambia a vlan_header_ops. Eso es incorrecto y activar\u00e1 null-ptr-deref para vlan-&gt;real_dev en vlan_dev_hard_header() porque el dispositivo del equipo no es un dispositivo vlan. Almacene en cach\u00e9 eth_header_ops en team_setup(), luego asigne header_ops almacenados en cach\u00e9 a header_ops del dispositivo team net cuando su tipo cambie de no ether a ether para corregir el error."}], "id": "CVE-2023-52574", "lastModified": "2024-03-04T13:58:23.447", "metrics": {}, "published": "2024-03-02T22:15:49.393", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1779eb51b9cc628cee551f252701a85a2a50a457"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2f0acb0736ecc3eb85dc80ad2790d634dcb10b58"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/492032760127251e5540a5716a70996bacf2a3fd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a7fb47b9711101d2405b0eb1276fb1f9b9b270c7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b44dd92e2afd89eb6e9d27616858e72a67bdc1a7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c5f6478686bb45f453031594ae19b6c9723a780d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cac50d9f5d876be32cb9aa21c74018468900284d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cd05eec2ee0cc396813a32ef675634e403748255"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"affected_release": [{"advisory": "RHSA-2024:2950", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.rt7.342.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-05-22T00:00:00Z"}, {"advisory": "RHSA-2024:3138", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-05-22T00:00:00Z"}, {"advisory": "RHSA-2024:2394", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.13.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-04-30T00:00:00Z"}, {"advisory": "RHSA-2024:2394", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.13.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-04-30T00:00:00Z"}], "bugzilla": {"description": "kernel: team: NULL pointer dereference when team device type is changed", "id": "2267750", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2267750"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nteam: fix null-ptr-deref when team device type is changed\nGet a null-ptr-deref bug as follows with reproducer [1].\nBUG: kernel NULL pointer dereference, address: 0000000000000228\n...\nRIP: 0010:vlan_dev_hard_header+0x35/0x140 [8021q]\n...\nCall Trace:\n<TASK>\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]\nneigh_connected_output+0xb2/0x100\nip6_finish_output2+0x1cb/0x520\n? nf_hook_slow+0x43/0xc0\n? ip6_mtu+0x46/0x80\nip6_finish_output+0x2a/0xb0\nmld_sendpack+0x18f/0x250\nmld_ifc_work+0x39/0x160\nprocess_one_work+0x1e6/0x3f0\nworker_thread+0x4d/0x2f0\n? __pfx_worker_thread+0x10/0x10\nkthread+0xe5/0x120\n? __pfx_kthread+0x10/0x10\nret_from_fork+0x34/0x50\n? __pfx_kthread+0x10/0x10\nret_from_fork_asm+0x1b/0x30\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\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.\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.", "A NULL pointer dereference flaw was found in drivers/net/team/team.c in the Linux kernel."], "name": "CVE-2023-52574", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-03-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52574\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52574\nhttps://lore.kernel.org/linux-cve-announce/2024030256-CVE-2023-52574-a423@gregkh/T/#u"], "threat_severity": "Moderate", "upstream_fix": "kernel 4.14.327, kernel 4.19.296, kernel 5.4.258, kernel 5.10.198, kernel 5.15.134, kernel 6.1.56, kernel 6.5.6, kernel 6.6"}