CVE-2022-50063

Kernel crash via repeated tag-protocol teardown

Published Jun 18, 2025 · Updated May 11, 2026

Denial of service in Linux kernel 5.19 allows local users to crash the kernel by forcing a failed Felix DSA tag-protocol change. felix_change_tag_protocol repeats setup when DSA retries with the current protocol, registers tag_8021q twice, and tears down corrupted state. Reaching the fault requires local access and privileges to change a Felix DSA port's tagging protocol; the resulting NULL dereference halts the host.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux kernel 5.19 allows local users to crash the kernel by forcing a failed Felix DSA tag-protocol change. felix_change_tag_protocol repeats setup when DSA retries with the current protocol, registers tag_8021q twice, and tears down corrupted state. Reaching the fault requires local access and privileges to change a Felix DSA port's tagging protocol; the resulting NULL dereference halts the host.

The record

CVE
CVE-2022-50063
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.19
  2. Affected versionversion=7a29d220f4c0745a6d435dbd53c659fbde4998b6 <4c46bb49460ee14c69629e813640d8b929e88941
  3. Affected versionversion=7a29d220f4c0745a6d435dbd53c659fbde4998b6 <8e432f157c3edc5a97a7244c666589a438f5e4d4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=7a29d220f4c0745a6d435dbd53c659fbde4998b6 <4c46bb49460ee14c69629e813640d8b929e88941; version=7a29d220f4c0745a6d435dbd53c659fbde4998b6 <8e432f157c3edc5a97a7244c666589a438f5e4d4

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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