CVE-2022-50156

Local privilege escalation via unchecked block length

Published Jun 18, 2025 · Updated Aug 5, 2026

Out-of-bounds write in the Linux kernel cp2112 driver allows local users to corrupt kernel memory through an I2C block-read ioctl. cp2112_xfer() copies a user-controlled length of up to 255 bytes from buf into data->block[1], whose capacity is only 32 payload bytes. Exploitation requires access to a CP2112-backed /dev/i2c-N device; the overwrite can disclose data, hijack control flow, or crash the kernel.

CVSS severity7.8
High
EPSS probability0.21%
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 write in the Linux kernel cp2112 driver allows local users to corrupt kernel memory through an I2C block-read ioctl. cp2112_xfer() copies a user-controlled length of up to 255 bytes from buf into data->block[1], whose capacity is only 32 payload bytes. Exploitation requires access to a CP2112-backed /dev/i2c-N device; the overwrite can disclose data, hijack control flow, or crash the kernel.

The record

CVE
CVE-2022-50156
Published
Jun 18, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE 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=4.15
  2. Affected versionversion=542134c0375b5ca2b1d18490c02b8a20bfdd8d74 <26e427ac85c2b8d0d108cc80b6de34d33e2780c4
  3. Affected versionversion=542134c0375b5ca2b1d18490c02b8a20bfdd8d74 <381583845d19cb4bd21c8193449385f3fefa9caf
  4. Affected versionversion=542134c0375b5ca2b1d18490c02b8a20bfdd8d74 <3af7d60e9a6c17d6d41c4341f8020511887d372d
  5. Affected versionversion=542134c0375b5ca2b1d18490c02b8a20bfdd8d74 <519ff31a6ddd87aa4905bd9bf3b92e8b88801614
  6. Affected versionversion=542134c0375b5ca2b1d18490c02b8a20bfdd8d74 <8489a20ac481b08c0391608d81ed3796d373cfdf
  7. Affected versionversion=542134c0375b5ca2b1d18490c02b8a20bfdd8d74 <e7028944e61014ae915e7fb74963d3835f2f761a
  8. Affected versionversion=542134c0375b5ca2b1d18490c02b8a20bfdd8d74 <ebda3d6b004bb6127a66a616524a2de152302ca7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.15; version=542134c0375b5ca2b1d18490c02b8a20bfdd8d74 <26e427ac85c2b8d0d108cc80b6de34d33e2780c4; version=542134c0375b5ca2b1d18490c02b8a20bfdd8d74 <381583845d19cb4bd21c8193449385f3fefa9caf; version=542134c0375b5ca2b1d18490c02b8a20bfdd8d74 <3af7d60e9a6c17d6d41c4341f8020511887d372d; version=542134c0375b5ca2b1d18490c02b8a20bfdd8d74 <519ff31a6ddd87aa4905bd9bf3b92e8b88801614; version=542134c0375b5ca2b1d18490c02b8a20bfdd8d74 <8489a20ac481b08c0391608d81ed3796d373cfdf; version=542134c0375b5ca2b1d18490c02b8a20bfdd8d74 <e7028944e61014ae915e7fb74963d3835f2f761a; version=542134c0375b5ca2b1d18490c02b8a20bfdd8d74 <ebda3d6b004bb6127a66a616524a2de152302ca7

Published CVSS scores

7.8Linux CNACVSS: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

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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-787Out-of-bounds Write
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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