CVE-2022-48742

Local kernel crash via stale rtnetlink pointers

Published Jun 20, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel rtnetlink 3.14 through 5.16.5 allows local users to crash the kernel through crafted link changes. The __rtnl_newlink() replay loop retains master_dev and m_ops pointers from a preceding attempt, allowing a later iteration to dereference freed objects. A local low-privileged user must reach rtnetlink link-creation handling; exploitation can panic the host, while broader confidentiality or integrity effects are not established by the upstream patch.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel rtnetlink 3.14 through 5.16.5 allows local users to crash the kernel through crafted link changes. The __rtnl_newlink() replay loop retains master_dev and m_ops pointers from a preceding attempt, allowing a later iteration to dereference freed objects. A local low-privileged user must reach rtnetlink link-creation handling; exploitation can panic the host, while broader confidentiality or integrity effects are not established by the upstream patch.

The record

CVE
CVE-2022-48742
Published
Jun 20, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 20, 2024CVE 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=3.14
  2. Affected versionversion=ba7d49b1f0f8e5f24294a880ed576964059af5ef <2cf180360d66bd657e606c1217e0e668e6faa303
  3. Affected versionversion=ba7d49b1f0f8e5f24294a880ed576964059af5ef <36a9a0aee881940476b254e0352581401b23f210
  4. Affected versionversion=ba7d49b1f0f8e5f24294a880ed576964059af5ef <3bbe2019dd12b8d13671ee6cda055d49637b4c39
  5. Affected versionversion=ba7d49b1f0f8e5f24294a880ed576964059af5ef <7d9211678c0f0624f74cdff36117ab8316697bb8
  6. Affected versionversion=ba7d49b1f0f8e5f24294a880ed576964059af5ef <a01e60a1ec6bef9be471fb7182a33c6d6f124e93
  7. Affected versionversion=ba7d49b1f0f8e5f24294a880ed576964059af5ef <bd43771ee9759dd9dfae946bff190e2c5a120de5
  8. Affected versionversion=ba7d49b1f0f8e5f24294a880ed576964059af5ef <c6f6f2444bdbe0079e41914a35081530d0409963
  9. Affected versionversion=ba7d49b1f0f8e5f24294a880ed576964059af5ef <def5e7070079b2a214b3b1a2fbec623e6fbfe34a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.14; version=ba7d49b1f0f8e5f24294a880ed576964059af5ef <2cf180360d66bd657e606c1217e0e668e6faa303; version=ba7d49b1f0f8e5f24294a880ed576964059af5ef <36a9a0aee881940476b254e0352581401b23f210; version=ba7d49b1f0f8e5f24294a880ed576964059af5ef <3bbe2019dd12b8d13671ee6cda055d49637b4c39; version=ba7d49b1f0f8e5f24294a880ed576964059af5ef <7d9211678c0f0624f74cdff36117ab8316697bb8; version=ba7d49b1f0f8e5f24294a880ed576964059af5ef <a01e60a1ec6bef9be471fb7182a33c6d6f124e93; version=ba7d49b1f0f8e5f24294a880ed576964059af5ef <bd43771ee9759dd9dfae946bff190e2c5a120de5; version=ba7d49b1f0f8e5f24294a880ed576964059af5ef <c6f6f2444bdbe0079e41914a35081530d0409963; version=ba7d49b1f0f8e5f24294a880ed576964059af5ef <def5e7070079b2a214b3b1a2fbec623e6fbfe34a

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5Amazon LinuxCVSS: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 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-416Use After Free
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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