CVE-2022-49135

Local service interruption via debugfs memory leaks

Published Feb 26, 2025 · Updated Aug 12, 2026

Memory leak in the AMD display debugfs code in Linux allows local users to exhaust kernel memory through failing read operations. Several debugfs read handlers allocate rd_buf but return after put_user failures or a missing pipe context without calling kfree. Local low-privileged access to the affected debugfs entries is required, and repeated failures consume unreleased kernel memory until service interruption.

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

Memory leak in the AMD display debugfs code in Linux allows local users to exhaust kernel memory through failing read operations. Several debugfs read handlers allocate rd_buf but return after put_user failures or a missing pipe context without calling kfree. Local low-privileged access to the affected debugfs entries is required, and repeated failures consume unreleased kernel memory until service interruption.

The record

CVE
CVE-2022-49135
Published
Feb 26, 2025
Updated
Aug 12, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, 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

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=4.19
  2. Affected versionversion=f8ac2cf78f276b4d9fc0bc6b90f5e3560caa11de <3ce1497add6d17b48cc9df65095bd20202d93994
  3. Affected versionversion=f8ac2cf78f276b4d9fc0bc6b90f5e3560caa11de <5076315aaddd640bde896ec8d79423ed8ec83a59
  4. Affected versionversion=f8ac2cf78f276b4d9fc0bc6b90f5e3560caa11de <5d5c6dba2b43e28845d7d7ed32a36802329a5f52
  5. Affected versionversion=f8ac2cf78f276b4d9fc0bc6b90f5e3560caa11de <7e10369c72db7a0e2f77b2e306aadc07aef6b07a
  6. Affected versionversion=f8ac2cf78f276b4d9fc0bc6b90f5e3560caa11de <9d0bef3cc22cf250278ed45b829f062a00af9e27

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.19; version=f8ac2cf78f276b4d9fc0bc6b90f5e3560caa11de <3ce1497add6d17b48cc9df65095bd20202d93994; version=f8ac2cf78f276b4d9fc0bc6b90f5e3560caa11de <5076315aaddd640bde896ec8d79423ed8ec83a59; version=f8ac2cf78f276b4d9fc0bc6b90f5e3560caa11de <5d5c6dba2b43e28845d7d7ed32a36802329a5f52; version=f8ac2cf78f276b4d9fc0bc6b90f5e3560caa11de <7e10369c72db7a0e2f77b2e306aadc07aef6b07a; version=f8ac2cf78f276b4d9fc0bc6b90f5e3560caa11de <9d0bef3cc22cf250278ed45b829f062a00af9e27

Published CVSS scores

5.5SUSECVSS: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
5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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-401Missing Release of Memory after Effective Lifetime
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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