CVE-2022-3170

Kernel crash via misordered ALSA name bounds check

Published Sep 13, 2022 · Updated Aug 3, 2024

Out-of-bounds read in Linux Kernel before 6.0-rc4 allows local users with elevated privileges to crash the system through an ioctl. The ALSA get_ctl_id_hash loop tests a name byte before confirming that the offset remains below the fixed array bound when no null terminator is present. The ioctl path requires privileged local access; the source does not establish whether the one-byte overread reliably escalates privileges beyond the demonstrated crash.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Linux Kernel before 6.0-rc4 allows local users with elevated privileges to crash the system through an ioctl. The ALSA get_ctl_id_hash loop tests a name byte before confirming that the offset remains below the fixed array bound when no null terminator is present. The ioctl path requires privileged local access; the source does not establish whether the one-byte overread reliably escalates privileges beyond the demonstrated crash.

The record

CVE
CVE-2022-3170
Published
Sep 13, 2022
Updated
Aug 3, 2024
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-125, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=fixed in kernel 6.0-rc4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=fixed in kernel 6.0-rc4

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/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.

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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-125Out-of-bounds Read
T1068Exploitation for Privilege Escalation

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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