CVE-2022-49164

Service interruption via transactional-memory r13 corruption

Published Feb 26, 2025 · Updated May 11, 2026

Register corruption in the PowerPC transactional-memory code in Linux before 5.18 allows local users to interrupt service. In treclaim and trechkpt, an SLB miss after r13 holds a saved user value replaces it with a kernel value that is then written into checkpointed registers. Triggering requires removal of the relevant SLB entry during a tiny instruction window, such as by an SLB-related machine-check event; KVM does not discard that entry.

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

Register corruption in the PowerPC transactional-memory code in Linux before 5.18 allows local users to interrupt service. In treclaim and trechkpt, an SLB miss after r13 holds a saved user value replaces it with a kernel value that is then written into checkpointed registers. Triggering requires removal of the relevant SLB entry during a tiny instruction window, such as by an SLB-related machine-check event; KVM does not discard that entry.

The record

CVE
CVE-2022-49164
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
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

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=3.9
  2. Affected versionversion=98ae22e15b430bfed5def01ac1a88ec9396284c8 <5dce84f475d13b773a1a4c823581cab25044d86a
  3. Affected versionversion=98ae22e15b430bfed5def01ac1a88ec9396284c8 <73d8082c90f17dfba57cad4ca94db5cae323f1b1
  4. Affected versionversion=98ae22e15b430bfed5def01ac1a88ec9396284c8 <9d71165d3934e607070c4e48458c0cf161b1baea

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.9; version=98ae22e15b430bfed5def01ac1a88ec9396284c8 <5dce84f475d13b773a1a4c823581cab25044d86a; version=98ae22e15b430bfed5def01ac1a88ec9396284c8 <73d8082c90f17dfba57cad4ca94db5cae323f1b1; version=98ae22e15b430bfed5def01ac1a88ec9396284c8 <9d71165d3934e607070c4e48458c0cf161b1baea

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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 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

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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