CVE-2023-52574

Kernel crash via incorrect team header operations

Published Mar 2, 2024 · Updated Aug 5, 2026

NULL pointer dereference in Linux 3.7 through 6.6-rc2 allows local users to crash the kernel through team-device reconfiguration. When a VLAN device is enslaved after a team device changes from a non-Ethernet type to Ethernet, team.c assigns vlan_header_ops to a non-VLAN team device, so vlan_dev_hard_header dereferences an invalid vlan->real_dev pointer. Triggering the demonstrated failure requires CAP_NET_ADMIN for local rtnetlink configuration, obtainable inside an unprivileged user namespace, and the observed consequence is a kernel oops that interrupts service.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux 3.7 through 6.6-rc2 allows local users to crash the kernel through team-device reconfiguration. When a VLAN device is enslaved after a team device changes from a non-Ethernet type to Ethernet, team.c assigns vlan_header_ops to a non-VLAN team device, so vlan_dev_hard_header dereferences an invalid vlan->real_dev pointer. Triggering the demonstrated failure requires CAP_NET_ADMIN for local rtnetlink configuration, obtainable inside an unprivileged user namespace, and the observed consequence is a kernel oops that interrupts service.

The record

CVE
CVE-2023-52574
Published
Mar 2, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1d76efe1577b4323609b1bcbfafa8b731eda071a <1779eb51b9cc628cee551f252701a85a2a50a457
  2. Affected versionversion=1d76efe1577b4323609b1bcbfafa8b731eda071a <2f0acb0736ecc3eb85dc80ad2790d634dcb10b58
  3. Affected versionversion=1d76efe1577b4323609b1bcbfafa8b731eda071a <492032760127251e5540a5716a70996bacf2a3fd
  4. Affected versionversion=1d76efe1577b4323609b1bcbfafa8b731eda071a <a7fb47b9711101d2405b0eb1276fb1f9b9b270c7
  5. Affected versionversion=1d76efe1577b4323609b1bcbfafa8b731eda071a <b44dd92e2afd89eb6e9d27616858e72a67bdc1a7
  6. Affected versionversion=1d76efe1577b4323609b1bcbfafa8b731eda071a <c5f6478686bb45f453031594ae19b6c9723a780d
  7. Affected versionversion=1d76efe1577b4323609b1bcbfafa8b731eda071a <cac50d9f5d876be32cb9aa21c74018468900284d
  8. Affected versionversion=1d76efe1577b4323609b1bcbfafa8b731eda071a <cd05eec2ee0cc396813a32ef675634e403748255
  9. Affected versionversion=3.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1d76efe1577b4323609b1bcbfafa8b731eda071a <1779eb51b9cc628cee551f252701a85a2a50a457; version=1d76efe1577b4323609b1bcbfafa8b731eda071a <2f0acb0736ecc3eb85dc80ad2790d634dcb10b58; version=1d76efe1577b4323609b1bcbfafa8b731eda071a <492032760127251e5540a5716a70996bacf2a3fd; version=1d76efe1577b4323609b1bcbfafa8b731eda071a <a7fb47b9711101d2405b0eb1276fb1f9b9b270c7; version=1d76efe1577b4323609b1bcbfafa8b731eda071a <b44dd92e2afd89eb6e9d27616858e72a67bdc1a7; version=1d76efe1577b4323609b1bcbfafa8b731eda071a <c5f6478686bb45f453031594ae19b6c9723a780d; version=1d76efe1577b4323609b1bcbfafa8b731eda071a <cac50d9f5d876be32cb9aa21c74018468900284d; version=1d76efe1577b4323609b1bcbfafa8b731eda071a <cd05eec2ee0cc396813a32ef675634e403748255; version=3.7

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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