Vulnerability-Lookup

FKIE_CVE-2023-52574

Vulnerability from fkie_nvd - Published: 2024-03-02 22:15 - Updated: 2026-08-04 10:18

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: team: fix null-ptr-deref when team device type is changed Get a null-ptr-deref bug as follows with reproducer [1]. BUG: kernel NULL pointer dereference, address: 0000000000000228 ... RIP: 0010:vlan_dev_hard_header+0x35/0x140 [8021q] ... Call Trace: <TASK> ? __die+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 worker_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"}}' $ ip link add name t-dummy type dummy $ ip link add link t-dummy name t-dummy.100 type vlan id 100 $ ip link add name t-nlmon type nlmon $ ip link set t-nlmon master team0 $ ip link set t-nlmon nomaster $ ip link set t-dummy up $ ip link set team0 up $ ip link set t-dummy.100 down $ ip link set t-dummy.100 master team0 When enslave a vlan device to team device and team device type is changed from non-ether to ether, header_ops of team device is changed to vlan_header_ops. That is incorrect and will trigger null-ptr-deref for vlan->real_dev in vlan_dev_hard_header() because team device is not a vlan device. Cache eth_header_ops in team_setup(), then assign cached header_ops to header_ops of team net device when its type is changed from non-ether to ether to fix the bug.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1779eb51b9cc628cee551f252701a85a2a50a457	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2f0acb0736ecc3eb85dc80ad2790d634dcb10b58	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/492032760127251e5540a5716a70996bacf2a3fd	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a7fb47b9711101d2405b0eb1276fb1f9b9b270c7	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b44dd92e2afd89eb6e9d27616858e72a67bdc1a7	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c5f6478686bb45f453031594ae19b6c9723a780d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cac50d9f5d876be32cb9aa21c74018468900284d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cd05eec2ee0cc396813a32ef675634e403748255	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/1779eb51b9cc628cee551f252701a85a2a50a457	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/2f0acb0736ecc3eb85dc80ad2790d634dcb10b58	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/492032760127251e5540a5716a70996bacf2a3fd	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/a7fb47b9711101d2405b0eb1276fb1f9b9b270c7	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/b44dd92e2afd89eb6e9d27616858e72a67bdc1a7	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/c5f6478686bb45f453031594ae19b6c9723a780d	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/cac50d9f5d876be32cb9aa21c74018468900284d	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/cd05eec2ee0cc396813a32ef675634e403748255	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.6
linux	linux_kernel	6.6

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/team/team.c",
            "include/linux/if_team.h"
          ],
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          "vendor": "Linux",
          "versions": [
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            "include/linux/if_team.h"
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          "vendor": "Linux",
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              "status": "affected",
              "version": "3.7"
            },
            {
              "lessThan": "3.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.327",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.296",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.198",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.134",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.5.*",
              "status": "unaffected",
              "version": "6.5.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.6",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "vulnerable": true
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            {
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            {
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            {
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              "matchCriteriaId": "5EA89569-DD45-4A69-BB4D-8356FA9386BD",
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            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "870FC772-173A-4A0F-B1AF-7976AD6057D3",
              "versionEndExcluding": "6.5.6",
              "versionStartIncluding": "6.2",
              "vulnerable": true
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.6:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "84267A4F-DBC2-444F-B41D-69E15E1BEC97",
              "vulnerable": true
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      ]
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  ],
  "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 \u003cTASK\u003e\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 \u0027{\"runner\": {\"name\": \"loadbalance\"}}\u0027\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-\u003ereal_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 \u0027{\"runner\": {\"name\": \"loadbalance\"}}\u0027 $ 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-\u0026gt;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": "2026-08-04T10:18:32.483",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-52574",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-03-06T20:45:03.463636Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-03-02T22:15:49.393",
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      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2023-52574 (GCVE-0-2023-52574)

Vulnerability from cvelistv5 – Published: 2024-03-02 21:59 – Updated: 2026-08-05 09:10

Title

team: fix null-ptr-deref when team device type is changed

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-03-06 20:45 UTC

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/1779eb51b9cc628ce…
https://git.kernel.org/stable/c/a7fb47b9711101d24…
https://git.kernel.org/stable/c/c5f6478686bb45f45…
https://git.kernel.org/stable/c/b44dd92e2afd89eb6…
https://git.kernel.org/stable/c/cd05eec2ee0cc3968…
https://git.kernel.org/stable/c/2f0acb0736ecc3eb8…
https://git.kernel.org/stable/c/cac50d9f5d876be32…
https://git.kernel.org/stable/c/492032760127251e5…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1d76efe1577b4323609b1bcbfafa8b731eda071a , < 1779eb51b9cc628cee551f252701a85a2a50a457 (git) Affected: 1d76efe1577b4323609b1bcbfafa8b731eda071a , < a7fb47b9711101d2405b0eb1276fb1f9b9b270c7 (git) Affected: 1d76efe1577b4323609b1bcbfafa8b731eda071a , < c5f6478686bb45f453031594ae19b6c9723a780d (git) Affected: 1d76efe1577b4323609b1bcbfafa8b731eda071a , < b44dd92e2afd89eb6e9d27616858e72a67bdc1a7 (git) Affected: 1d76efe1577b4323609b1bcbfafa8b731eda071a , < cd05eec2ee0cc396813a32ef675634e403748255 (git) Affected: 1d76efe1577b4323609b1bcbfafa8b731eda071a , < 2f0acb0736ecc3eb85dc80ad2790d634dcb10b58 (git) Affected: 1d76efe1577b4323609b1bcbfafa8b731eda071a , < cac50d9f5d876be32cb9aa21c74018468900284d (git) Affected: 1d76efe1577b4323609b1bcbfafa8b731eda071a , < 492032760127251e5540a5716a70996bacf2a3fd (git)
Linux	Linux	Affected: 3.7 Unaffected: 0 , < 3.7 (semver) Unaffected: 4.14.327 , ≤ 4.14.* (semver) Unaffected: 4.19.296 , ≤ 4.19.* (semver) Unaffected: 5.4.258 , ≤ 5.4.* (semver) Unaffected: 5.10.198 , ≤ 5.10.* (semver) Unaffected: 5.15.134 , ≤ 5.15.* (semver) Unaffected: 6.1.56 , ≤ 6.1.* (semver) Unaffected: 6.5.6 , ≤ 6.5.* (semver) Unaffected: 6.6 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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              "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\u0027s 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."
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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FKIE_CVE-2023-52574

CVE-2023-52574 (GCVE-0-2023-52574)

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