CVE-2022-49137

Local service interruption via leaked fence references

Published Feb 26, 2025 · Updated Aug 12, 2026

Reference-count leakage in the Linux kernel AMDGPU command-submission path allows local users to interrupt service through a crafted ioctl. The amdgpu_cs_fence_to_handle_ioctl() default branch returns EINVAL without releasing the dma_fence reference acquired by amdgpu_cs_get_fence(). A low-privilege local user with AMDGPU device access can repeatedly trigger the error path, accumulating kernel references until resource exhaustion interrupts service.

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

Reference-count leakage in the Linux kernel AMDGPU command-submission path allows local users to interrupt service through a crafted ioctl. The amdgpu_cs_fence_to_handle_ioctl() default branch returns EINVAL without releasing the dma_fence reference acquired by amdgpu_cs_get_fence(). A low-privilege local user with AMDGPU device access can repeatedly trigger the error path, accumulating kernel references until resource exhaustion interrupts service.

The record

CVE
CVE-2022-49137
Published
Feb 26, 2025
Updated
Aug 12, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
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=4.15
  2. Affected versionversion=7ca24cf2d2269bde25e21c02a77fe81995a081ae <3edd8646cb7c11b57c90e026bda6f21076223f5b
  3. Affected versionversion=7ca24cf2d2269bde25e21c02a77fe81995a081ae <4009f104b02b223d1a11d74b36b1cc083bc37028
  4. Affected versionversion=7ca24cf2d2269bde25e21c02a77fe81995a081ae <72d77ddb2224ebc00648f4f78f8a9a259dccbdf7
  5. Affected versionversion=7ca24cf2d2269bde25e21c02a77fe81995a081ae <927beb05aaa429c883cc0ec6adc48964b187e291
  6. Affected versionversion=7ca24cf2d2269bde25e21c02a77fe81995a081ae <b6d1f7d97c81ebaf2cda9c4c943ee2e484fffdcf
  7. Affected versionversion=7ca24cf2d2269bde25e21c02a77fe81995a081ae <bc2d5c0775c839e2b072884f4ee6a93ba410f107
  8. Affected versionversion=7ca24cf2d2269bde25e21c02a77fe81995a081ae <dfced44f122c500004a48ecc8db516bb6a295a1b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.15; version=7ca24cf2d2269bde25e21c02a77fe81995a081ae <3edd8646cb7c11b57c90e026bda6f21076223f5b; version=7ca24cf2d2269bde25e21c02a77fe81995a081ae <4009f104b02b223d1a11d74b36b1cc083bc37028; version=7ca24cf2d2269bde25e21c02a77fe81995a081ae <72d77ddb2224ebc00648f4f78f8a9a259dccbdf7; version=7ca24cf2d2269bde25e21c02a77fe81995a081ae <927beb05aaa429c883cc0ec6adc48964b187e291; version=7ca24cf2d2269bde25e21c02a77fe81995a081ae <b6d1f7d97c81ebaf2cda9c4c943ee2e484fffdcf; version=7ca24cf2d2269bde25e21c02a77fe81995a081ae <bc2d5c0775c839e2b072884f4ee6a93ba410f107; version=7ca24cf2d2269bde25e21c02a77fe81995a081ae <dfced44f122c500004a48ecc8db516bb6a295a1b

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

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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