CVE-2022-50272

Kernel crash via zero-length az6027 I2C message

Published Sep 15, 2025 · Updated Sep 15, 2025

NULL pointer dereference in the Linux kernel az6027 DVB-USB driver allows local users to crash the kernel through a crafted I2C ioctl. In az6027_i2c_xfer(), the address-0x99 branch accesses msg[i].buf without first rejecting a zero-length message whose buffer is NULL. Triggering requires access to the az6027-backed I2C device and submission of the malformed transfer; the bounded consequence is a kernel crash.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel az6027 DVB-USB driver allows local users to crash the kernel through a crafted I2C ioctl. In az6027_i2c_xfer(), the address-0x99 branch accesses msg[i].buf without first rejecting a zero-length message whose buffer is NULL. Triggering requires access to the az6027-backed I2C device and submission of the malformed transfer; the bounded consequence is a kernel crash.

The record

CVE
CVE-2022-50272
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record 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=2.6.34
  2. Affected versionversion=76f9a820c8672ada12ffa0903652c9e6f2429462 <0ed554fd769a19ea8464bb83e9ac201002ef74ad
  3. Affected versionversion=76f9a820c8672ada12ffa0903652c9e6f2429462 <210fcf64be4db82c0e190e74b5111e4eef661a7a
  4. Affected versionversion=76f9a820c8672ada12ffa0903652c9e6f2429462 <2b6a8a1a32746981044e7ab06649c804acb4068a
  5. Affected versionversion=76f9a820c8672ada12ffa0903652c9e6f2429462 <559891d430e3f3a178040c4371ed419edbfa7d65
  6. Affected versionversion=76f9a820c8672ada12ffa0903652c9e6f2429462 <6b60cf73a931af34b7a0a3f467a79d9fe0df2d70
  7. Affected versionversion=76f9a820c8672ada12ffa0903652c9e6f2429462 <6fbc44731a4665cbe92a5090e9804a388a72214b
  8. Affected versionversion=76f9a820c8672ada12ffa0903652c9e6f2429462 <7abfe467cd685f5da7ecb415441e45e3e4e2baa8
  9. Affected versionversion=76f9a820c8672ada12ffa0903652c9e6f2429462 <8b256d23361c51aa4b7fdb71176c1ca50966fb39
  10. Affected versionversion=76f9a820c8672ada12ffa0903652c9e6f2429462 <c712d1ccbfb787620422b437a5b8fac0802547bd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.34; version=76f9a820c8672ada12ffa0903652c9e6f2429462 <0ed554fd769a19ea8464bb83e9ac201002ef74ad; version=76f9a820c8672ada12ffa0903652c9e6f2429462 <210fcf64be4db82c0e190e74b5111e4eef661a7a; version=76f9a820c8672ada12ffa0903652c9e6f2429462 <2b6a8a1a32746981044e7ab06649c804acb4068a; version=76f9a820c8672ada12ffa0903652c9e6f2429462 <559891d430e3f3a178040c4371ed419edbfa7d65; version=76f9a820c8672ada12ffa0903652c9e6f2429462 <6b60cf73a931af34b7a0a3f467a79d9fe0df2d70; version=76f9a820c8672ada12ffa0903652c9e6f2429462 <6fbc44731a4665cbe92a5090e9804a388a72214b; version=76f9a820c8672ada12ffa0903652c9e6f2429462 <7abfe467cd685f5da7ecb415441e45e3e4e2baa8; version=76f9a820c8672ada12ffa0903652c9e6f2429462 <8b256d23361c51aa4b7fdb71176c1ca50966fb39; version=76f9a820c8672ada12ffa0903652c9e6f2429462 <c712d1ccbfb787620422b437a5b8fac0802547bd

Published CVSS scores

No CVSS assessment is available in this record.

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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