CVE-2022-50263

Service interruption via incomplete IOTLB cleanup

Published Sep 15, 2025 · Updated Sep 15, 2025

Memory leak in the vdpasim component of the Linux kernel allows local users to exhaust kernel memory by freeing configured devices. The vdpasim_free function applies a single-IOTLB cleanup to an IOTLB array, leaving mappings allocated in every address space after the first. Exploitation requires local low-privileged access and an affected vdpasim configuration; repeated teardown can interrupt service through memory exhaustion.

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

Memory leak in the vdpasim component of the Linux kernel allows local users to exhaust kernel memory by freeing configured devices. The vdpasim_free function applies a single-IOTLB cleanup to an IOTLB array, leaving mappings allocated in every address space after the first. Exploitation requires local low-privileged access and an affected vdpasim configuration; repeated teardown can interrupt service through memory exhaustion.

The record

CVE
CVE-2022-50263
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record 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 <0b7a04a30eef20e6b24926a45c0ce7906ae85bd6
  3. Affected versionversion=bda324fd037a6b0d44da5699574ce741ca161bc4 <16b22e27fba6fd816d0dcb98f42cc71f0836c27e
  4. Affected versionversion=bda324fd037a6b0d44da5699574ce741ca161bc4 <54b210c90d2803a9f1c8fd2f0d08e90172e9a06d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=bda324fd037a6b0d44da5699574ce741ca161bc4 <0b7a04a30eef20e6b24926a45c0ce7906ae85bd6; version=bda324fd037a6b0d44da5699574ce741ca161bc4 <16b22e27fba6fd816d0dcb98f42cc71f0836c27e; version=bda324fd037a6b0d44da5699574ce741ca161bc4 <54b210c90d2803a9f1c8fd2f0d08e90172e9a06d

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.

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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
T1499.004Application or System Exploitation

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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