CVE-2022-49294

Local kernel panic via zero clock modulo

Published Feb 26, 2025 · Updated Aug 12, 2026

Divide by zero in Linux allows local users to panic affected kernels through the AMD display clock-frequency calculation path. The get_pixel_clk_frequency_100hz function reads the MODULO register and passes its unchecked zero value as the divisor to div_u64. Access requires a local low-privileged context, and the resulting divide-by-zero interrupts the entire host rather than exposing or altering data.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Divide by zero in Linux allows local users to panic affected kernels through the AMD display clock-frequency calculation path. The get_pixel_clk_frequency_100hz function reads the MODULO register and passes its unchecked zero value as the divisor to div_u64. Access requires a local low-privileged context, and the resulting divide-by-zero interrupts the entire host rather than exposing or altering data.

The record

CVE
CVE-2022-49294
Published
Feb 26, 2025
Updated
Aug 12, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-369, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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=5.13
  2. Affected versionversion=77a2b7265f20ee827e527eaa6f82b87e88388947 <07efce8269a038c37814eb656b4de14aa3015fc6
  3. Affected versionversion=77a2b7265f20ee827e527eaa6f82b87e88388947 <10ef82d6e0af5536ec64770c07f6bbabfdd6977c
  4. Affected versionversion=77a2b7265f20ee827e527eaa6f82b87e88388947 <49947b906a6bd9668eaf4f9cf691973c25c26955
  5. Affected versionversion=77a2b7265f20ee827e527eaa6f82b87e88388947 <96725758eff7b3805e4e94d1443a100757412720

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.13; version=77a2b7265f20ee827e527eaa6f82b87e88388947 <07efce8269a038c37814eb656b4de14aa3015fc6; version=77a2b7265f20ee827e527eaa6f82b87e88388947 <10ef82d6e0af5536ec64770c07f6bbabfdd6977c; version=77a2b7265f20ee827e527eaa6f82b87e88388947 <49947b906a6bd9668eaf4f9cf691973c25c26955; version=77a2b7265f20ee827e527eaa6f82b87e88388947 <96725758eff7b3805e4e94d1443a100757412720

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS: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 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-369Divide By Zero
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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