CVE-2022-49353

Kernel panic via zero-sized statistics buffer

Published Feb 26, 2025 · Updated May 11, 2026

NULL pointer dereference in Linux 5.18.3 allows local users to trigger a kernel panic during papr_scm probing on POWER10 vPMEM LPARs. papr_scm_pmu_check_events omits a stat_buffer_len check and calls drc_pmem_query_stats with a zero-sized buffer for an NVDIMM lacking performance statistic IDs. The path is reached when HMC performance-information collection is disabled, and the resulting fault crashes the kernel during driver probing.

CVSS severity5.5
Medium
EPSS probability0.23%
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 Linux 5.18.3 allows local users to trigger a kernel panic during papr_scm probing on POWER10 vPMEM LPARs. papr_scm_pmu_check_events omits a stat_buffer_len check and calls drc_pmem_query_stats with a zero-sized buffer for an NVDIMM lacking performance statistic IDs. The path is reached when HMC performance-information collection is disabled, and the resulting fault crashes the kernel during driver probing.

The record

CVE
CVE-2022-49353
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476
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

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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=0e0946e22f3665d27325d389ff45ade6e93f3678 <07bf9431b1590d1cd7a8d62075d0b50b073f0495
  2. Affected versionversion=5.18.3 <5.18.4
  3. Affected versionversion=b073096df4dec70d0436321b7093bad27ae91f9e <e1295aab2ebcda1c1a9ed342baedc080e5c393e5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0e0946e22f3665d27325d389ff45ade6e93f3678 <07bf9431b1590d1cd7a8d62075d0b50b073f0495; version=5.18.3 <5.18.4; version=b073096df4dec70d0436321b7093bad27ae91f9e <e1295aab2ebcda1c1a9ed342baedc080e5c393e5

Published CVSS scores

5.5CISA-ADPCVSS: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-476NULL Pointer Dereference

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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