CVE-2022-1048Public exploit

Local privilege escalation via unsynchronized PCM ioctls

Published Apr 29, 2022 · Updated Aug 2, 2024

Use-after-free in ALSA PCM in affected Linux Kernel releases allows local users to crash the system or elevate privileges via concurrent ioctls. The PCM core releases its stream lock before buffer teardown, so overlapping hw_params or hw_free calls can free the same runtime DMA-buffer allocation while another call still uses it. Access to a PCM device is required, and reliable triggering depends on the sound driver allocating a replaceable buffer; successful exploitation causes a kernel crash or elevated execution.

CVSS severity7.0
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in ALSA PCM in affected Linux Kernel releases allows local users to crash the system or elevate privileges via concurrent ioctls. The PCM core releases its stream lock before buffer teardown, so overlapping hw_params or hw_free calls can free the same runtime DMA-buffer allocation while another call still uses it. Access to a PCM device is required, and reliable triggering depends on the sound driver allocating a replaceable buffer; successful exploitation causes a kernel crash or elevated execution.

The record

CVE
CVE-2022-1048
Published
Apr 29, 2022
Updated
Aug 2, 2024
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-362, CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 29, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=Linux kernel 5.17-rc9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=Linux kernel 5.17-rc9

Published CVSS scores

7.4SUSECVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
7.0Oracle LinuxCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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 exploitPublished

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

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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