CVE-2022-49262

Kernel crash via unregistered crypto algorithm cleanup

Published Feb 26, 2025 · Updated May 11, 2026

A NULL pointer dereference in the OcteonTX2 crypto driver in affected Linux kernels allows local users to crash the system during driver removal. When CONFIG_DM_CRYPT is enabled, initialization skips crypto-algorithm registration, but otx2_cpt_crypto_exit later unregisters the absent algorithms and dereferences a null pointer. A local low-privilege context, OcteonTX2 CPT hardware, and entry into the driver release path are required; the documented consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A NULL pointer dereference in the OcteonTX2 crypto driver in affected Linux kernels allows local users to crash the system during driver removal. When CONFIG_DM_CRYPT is enabled, initialization skips crypto-algorithm registration, but otx2_cpt_crypto_exit later unregisters the absent algorithms and dereferences a null pointer. A local low-privilege context, OcteonTX2 CPT hardware, and entry into the driver release path are required; the documented consequence is a kernel crash.

The record

CVE
CVE-2022-49262
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.12
  2. Affected versionversion=6f03f0e8b6c8a82d8e740ff3a87ed407ad423243 <2d841af23ae8f398c85dd1ff2dc24b5ec8ba4569
  3. Affected versionversion=6f03f0e8b6c8a82d8e740ff3a87ed407ad423243 <a1bf728f3388ac3a2c2dffa57e25622e90b9f6f2
  4. Affected versionversion=6f03f0e8b6c8a82d8e740ff3a87ed407ad423243 <a462214866eebbca87e13ff6d73092b1c4895624
  5. Affected versionversion=6f03f0e8b6c8a82d8e740ff3a87ed407ad423243 <e6374086f249295121384bfaa7cdcc8d461146f0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.12; version=6f03f0e8b6c8a82d8e740ff3a87ed407ad423243 <2d841af23ae8f398c85dd1ff2dc24b5ec8ba4569; version=6f03f0e8b6c8a82d8e740ff3a87ed407ad423243 <a1bf728f3388ac3a2c2dffa57e25622e90b9f6f2; version=6f03f0e8b6c8a82d8e740ff3a87ed407ad423243 <a462214866eebbca87e13ff6d73092b1c4895624; version=6f03f0e8b6c8a82d8e740ff3a87ed407ad423243 <e6374086f249295121384bfaa7cdcc8d461146f0

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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