CVE-2022-49884

Service interruption via reinitialized cache lock

Published May 1, 2025 · Updated Aug 5, 2026

Race condition in KVM in Linux 5.17 through 6.0.7 and 6.1-rc1 through 6.1-rc3 allows local users to interrupt service. kvm_gfn_to_pfn_cache_init() can reinitialize the gfn-to-pfn cache lock while kvm_xen_set_evtchn_fast() holds it, corrupting the shared-info cache lock. Low-privileged local access and a winning ioctl race are required; the documented consequence is lock corruption and availability loss.

CVSS severity4.7
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in KVM in Linux 5.17 through 6.0.7 and 6.1-rc1 through 6.1-rc3 allows local users to interrupt service. kvm_gfn_to_pfn_cache_init() can reinitialize the gfn-to-pfn cache lock while kvm_xen_set_evtchn_fast() holds it, corrupting the shared-info cache lock. Low-privileged local access and a winning ioctl race are required; the documented consequence is lock corruption and availability loss.

The record

CVE
CVE-2022-49884
Published
May 1, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE 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=5.17
  2. Affected versionversion=982ed0de4753ed6e71dbd40f82a5a066baf133ed <52491a38b2c2411f3f0229dc6ad610349c704a41
  3. Affected versionversion=982ed0de4753ed6e71dbd40f82a5a066baf133ed <61242001d6c9c253df7645dab090842d8da08764

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.17; version=982ed0de4753ed6e71dbd40f82a5a066baf133ed <52491a38b2c2411f3f0229dc6ad610349c704a41; version=982ed0de4753ed6e71dbd40f82a5a066baf133ed <61242001d6c9c253df7645dab090842d8da08764

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7Canonical UbuntuCVSS:3.1/AV:L/AC:H/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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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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