CVE-2022-48702Public exploit

Kernel memory corruption via wrapped voice allocation

Published May 3, 2024 · Updated Aug 5, 2026

Out-of-bounds access in Linux ALSA emu10k1 allows local users to corrupt kernel memory through multichannel PCM setup. snd_emu10k1_pcm_channel_alloc treats a wrapped voice allocation as contiguous, indexes beyond voices[64], and stores an epcm pointer out of bounds. Access to the emu10k1 PCM device is required; repeated stream configuration can disclose adjacent kernel memory or crash the host.

CVSS severity7.8
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

Out-of-bounds access in Linux ALSA emu10k1 allows local users to corrupt kernel memory through multichannel PCM setup. snd_emu10k1_pcm_channel_alloc treats a wrapped voice allocation as contiguous, indexes beyond voices[64], and stores an epcm pointer out of bounds. Access to the emu10k1 PCM device is required; repeated stream configuration can disclose adjacent kernel memory or crash the host.

The record

CVE
CVE-2022-48702
Published
May 3, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-129, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <39a90720f3abe96625d1224e7a7463410875de4c
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4204a01ffce97cae1d59edc5848f02be5b2b9178
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <45321a7d02b7cf9b3f97e3987fc1e4d649b82da2
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <45814a53514e10a8014906c882e0d0d38df39cc1
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <637c5310acb48fffcc5657568db3f3e9bc719bfa
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6b0e260ac3cf289e38446552461caa65e6dab275
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <88aac6684cf8bc885cca15463cb4407e91f28ff7
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d29f59051d3a07b81281b2df2b8c9dfe4716067f
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <39a90720f3abe96625d1224e7a7463410875de4c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4204a01ffce97cae1d59edc5848f02be5b2b9178; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <45321a7d02b7cf9b3f97e3987fc1e4d649b82da2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <45814a53514e10a8014906c882e0d0d38df39cc1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <637c5310acb48fffcc5657568db3f3e9bc719bfa; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6b0e260ac3cf289e38446552461caa65e6dab275; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <88aac6684cf8bc885cca15463cb4407e91f28ff7; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d29f59051d3a07b81281b2df2b8c9dfe4716067f; version=2.6.12

Published CVSS scores

7.8LinuxCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-129Improper Validation of Array Index
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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