CVE-2022-49046

Local system crash via unchecked device naming failure

Published Feb 26, 2025 · Updated May 23, 2026

Null-pointer dereference in i2c-dev in Linux kernel 5.7 through 5.17.3 allows local users to crash the system during adapter registration. The i2cdev_attach_adapter path ignores a failed dev_set_name call and continues registration with a NULL device name that later code dereferences. Low-privileged local access and an I2C adapter-registration path are required; the reported consequence is a kernel crash without data disclosure or modification.

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

Null-pointer dereference in i2c-dev in Linux kernel 5.7 through 5.17.3 allows local users to crash the system during adapter registration. The i2cdev_attach_adapter path ignores a failed dev_set_name call and continues registration with a NULL device name that later code dereferences. Low-privileged local access and an I2C adapter-registration path are required; the reported consequence is a kernel crash without data disclosure or modification.

The record

CVE
CVE-2022-49046
Published
Feb 26, 2025
Updated
May 23, 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 23, 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=1413ef638abae4ab5621901cf4d8ef08a4a48ba6 <2e539b17d4cbe5fb8b5152dd9a6e4a8828f97db2
  2. Affected versionversion=1413ef638abae4ab5621901cf4d8ef08a4a48ba6 <2f345bb14ad4744950499ff222e2899209297afa
  3. Affected versionversion=1413ef638abae4ab5621901cf4d8ef08a4a48ba6 <993eb48fa199b5f476df8204e652eff63dd19361
  4. Affected versionversion=1413ef638abae4ab5621901cf4d8ef08a4a48ba6 <c74d77a2d07744147d734138acd6ce9dba715e5d
  5. Affected versionversion=1bed86cfe5cb4529d036a14980d379aee8539982
  6. Affected versionversion=1c1b4327970c79c1a2d0c3becfc12b9696177c55
  7. Affected versionversion=4.14.182 <4.15
  8. Affected versionversion=4.19.125 <4.20
  9. Affected versionversion=4.4.225 <4.5
  10. Affected versionversion=4.9.225 <4.10
  11. Affected versionversion=5.4.43 <5.5
  12. Affected versionversion=5.6.15 <5.7
  13. Affected versionversion=5.7
  14. Affected versionversion=8a231148135d2d08a3ef721d438cd468ea4209d2
  15. Affected versionversion=a612c4ece2eb757011ae88a8410b48e523220b8d
  16. Affected versionversion=c0d34399045609eda76882fa6d01fdfaf5b20d38
  17. Affected versionversion=f1f3b4150baf7c3aa6b4e6b81b8ff1909996d507

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1413ef638abae4ab5621901cf4d8ef08a4a48ba6 <2e539b17d4cbe5fb8b5152dd9a6e4a8828f97db2; version=1413ef638abae4ab5621901cf4d8ef08a4a48ba6 <2f345bb14ad4744950499ff222e2899209297afa; version=1413ef638abae4ab5621901cf4d8ef08a4a48ba6 <993eb48fa199b5f476df8204e652eff63dd19361; version=1413ef638abae4ab5621901cf4d8ef08a4a48ba6 <c74d77a2d07744147d734138acd6ce9dba715e5d; version=1bed86cfe5cb4529d036a14980d379aee8539982; version=1c1b4327970c79c1a2d0c3becfc12b9696177c55; version=4.14.182 <4.15; version=4.19.125 <4.20; version=4.4.225 <4.5; version=4.9.225 <4.10; version=5.4.43 <5.5; version=5.6.15 <5.7; version=5.7; version=8a231148135d2d08a3ef721d438cd468ea4209d2; version=a612c4ece2eb757011ae88a8410b48e523220b8d; version=c0d34399045609eda76882fa6d01fdfaf5b20d38; version=f1f3b4150baf7c3aa6b4e6b81b8ff1909996d507

Published CVSS scores

6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS: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.

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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