CVE-2022-50058

Host crash via uninitialized address-space metadata

Published Jun 18, 2025 · Updated May 11, 2026

NULL pointer dereference in Linux 5.19 through 5.19.3 allows local users to crash the kernel when adding a vdpa_sim_blk device. vdpa_sim_blk leaves the nas and ngroups attributes at zero, so its first address space remains unallocated and vdpasim_map_range dereferences vdpasim->iommu[0]. Triggering the panic requires local access and permission to create a simulated block vDPA device; the demonstrated consequence is a host-wide service interruption.

CVSS severity5.5
Medium
EPSS probability0.15%
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 5.19 through 5.19.3 allows local users to crash the kernel when adding a vdpa_sim_blk device. vdpa_sim_blk leaves the nas and ngroups attributes at zero, so its first address space remains unallocated and vdpasim_map_range dereferences vdpasim->iommu[0]. Triggering the panic requires local access and permission to create a simulated block vDPA device; the demonstrated consequence is a host-wide service interruption.

The record

CVE
CVE-2022-50058
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 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=5.19
  2. Affected versionversion=bda324fd037a6b0d44da5699574ce741ca161bc4 <19cd4a5471b8eaa4bd161b0fdb4567f2fc88d809
  3. Affected versionversion=bda324fd037a6b0d44da5699574ce741ca161bc4 <a291c7d289fac2cb13fb2614a9a251afbbd86ce9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=bda324fd037a6b0d44da5699574ce741ca161bc4 <19cd4a5471b8eaa4bd161b0fdb4567f2fc88d809; version=bda324fd037a6b0d44da5699574ce741ca161bc4 <a291c7d289fac2cb13fb2614a9a251afbbd86ce9

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 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-476NULL Pointer Dereference
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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