CVE-2022-49334

Local service interruption via leaked xarray nodes

Published Feb 26, 2025 · Updated May 11, 2026

A memory leak in affected Linux kernel releases allows local users to interrupt service by exhausting kernel memory during huge-page splits. In mm/huge_memory.c, a failed xas_split_alloc() leaves xa_state at -ENOMEM, and split_huge_page_to_list() wrongly calls xas_nomem(), which treats the state as a request for more allocation instead of freeing unused xarray nodes. Local low-privilege access is required, and impact is limited to availability; the public record does not identify whether exhaustion causes a hang or crash.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A memory leak in affected Linux kernel releases allows local users to interrupt service by exhausting kernel memory during huge-page splits. In mm/huge_memory.c, a failed xas_split_alloc() leaves xa_state at -ENOMEM, and split_huge_page_to_list() wrongly calls xas_nomem(), which treats the state as a request for more allocation instead of freeing unused xarray nodes. Local low-privilege access is required, and impact is limited to availability; the public record does not identify whether exhaustion causes a hang or crash.

The record

CVE
CVE-2022-49334
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, 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=5.17
  2. Affected versionversion=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <69a37a8ba1b408a1c7616494aa7018e4b3844cbe
  3. Affected versionversion=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <95c8181b4947e000f3b9b8e5918d899fce77b93d
  4. Affected versionversion=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <c0c84962e297927ba57fd6ddc2bb000c9d149655

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.17; version=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <69a37a8ba1b408a1c7616494aa7018e4b3844cbe; version=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <95c8181b4947e000f3b9b8e5918d899fce77b93d; version=6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 <c0c84962e297927ba57fd6ddc2bb000c9d149655

Published CVSS scores

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.

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-401Missing Release of Memory after Effective Lifetime
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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