CVE-2022-50812

Local system crash via Clang miscompilation

Published Dec 30, 2025 · Updated Dec 30, 2025

A compiler-induced NULL-pointer dereference in affected Linux kernel builds allows local users to crash the operating system. security/Kconfig.hardening enabled CONFIG_ZERO_CALL_USED_REGS when Clang accepted the flag, although Clang 15.0.6 and earlier miscompiled the register-zeroing operation. The kernel must be built with the affected compiler and hardening option; the reproduced failure panics and reboots the host.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A compiler-induced NULL-pointer dereference in affected Linux kernel builds allows local users to crash the operating system. security/Kconfig.hardening enabled CONFIG_ZERO_CALL_USED_REGS when Clang accepted the flag, although Clang 15.0.6 and earlier miscompiled the register-zeroing operation. The kernel must be built with the affected compiler and hardening option; the reproduced failure panics and reboots the host.

The record

CVE
CVE-2022-50812
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0b202dfedb5aa2e7d07d849be33fa3a48c026926
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <21ca0bfa11bbb9a9207f5d2104f47d3d71b4616e
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8a4236456a3a402f6bb92aa7b75e7a3b4ef7a72c
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d6a9fb87e9d18f3394a9845546bbe868efdccfd2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0b202dfedb5aa2e7d07d849be33fa3a48c026926; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <21ca0bfa11bbb9a9207f5d2104f47d3d71b4616e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8a4236456a3a402f6bb92aa7b75e7a3b4ef7a72c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d6a9fb87e9d18f3394a9845546bbe868efdccfd2

Published CVSS scores

5.5SUSECVSS: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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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