CVE-2022-49608

Kernel crash via unchecked allocation failure

Published Feb 26, 2025 · Updated May 11, 2026

NULL pointer dereference in the Ralink pinctrl driver in affected Linux kernel versions allows local users to crash the kernel. The driver stores the result of devm_kcalloc in data->domains without checking for allocation failure and later dereferences the null pointer. Reachability requires the Ralink pinctrl driver to probe a compatible controller while the allocation fails; the bounded consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.27%
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 Ralink pinctrl driver in affected Linux kernel versions allows local users to crash the kernel. The driver stores the result of devm_kcalloc in data->domains without checking for allocation failure and later dereferences the null pointer. Reachability requires the Ralink pinctrl driver to probe a compatible controller while the allocation fails; the bounded consequence is a kernel crash.

The record

CVE
CVE-2022-49608
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.18
  2. Affected versionversion=a86854d0c599b3202307abceb68feee4d7061578 <13596e6c9e541e90e5fc2c52b23f08b951370da9
  3. Affected versionversion=a86854d0c599b3202307abceb68feee4d7061578 <44016a85419ca0d4f1e4d0127b330f8e4e2a57d0
  4. Affected versionversion=a86854d0c599b3202307abceb68feee4d7061578 <5595d30c4dc27d939635c3188c68203b6ece1711
  5. Affected versionversion=a86854d0c599b3202307abceb68feee4d7061578 <5694b162f275fb9a9f89422701b2b963be11e496
  6. Affected versionversion=a86854d0c599b3202307abceb68feee4d7061578 <6194c021496addc11763d1ffa89ce5751889fe3c
  7. Affected versionversion=a86854d0c599b3202307abceb68feee4d7061578 <c3b821e8e406d5650e587b7ac624ac24e9b780a8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.18; version=a86854d0c599b3202307abceb68feee4d7061578 <13596e6c9e541e90e5fc2c52b23f08b951370da9; version=a86854d0c599b3202307abceb68feee4d7061578 <44016a85419ca0d4f1e4d0127b330f8e4e2a57d0; version=a86854d0c599b3202307abceb68feee4d7061578 <5595d30c4dc27d939635c3188c68203b6ece1711; version=a86854d0c599b3202307abceb68feee4d7061578 <5694b162f275fb9a9f89422701b2b963be11e496; version=a86854d0c599b3202307abceb68feee4d7061578 <6194c021496addc11763d1ffa89ce5751889fe3c; version=a86854d0c599b3202307abceb68feee4d7061578 <c3b821e8e406d5650e587b7ac624ac24e9b780a8

Published CVSS scores

5.5NISTCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
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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