CVE-2022-50510

Local denial of service via hotplug callback leak

Published Oct 7, 2025 · Updated Oct 7, 2025

Denial of service in the Linux kernel SMMUv3 PMU driver allows local users to interrupt service through a CPU-hotplug event. The arm_smmu_pmu_init() failure path leaves the callback registered when platform_driver_register() fails instead of removing its CPU-hotplug state. Reachability requires an ARM SMMUv3 PMU, a driver-registration failure, and a subsequent CPU-hotplug event; invoking the stale callback can interrupt the host.

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

What happened

Denial of service in the Linux kernel SMMUv3 PMU driver allows local users to interrupt service through a CPU-hotplug event. The arm_smmu_pmu_init() failure path leaves the callback registered when platform_driver_register() fails instead of removing its CPU-hotplug state. Reachability requires an ARM SMMUv3 PMU, a driver-registration failure, and a subsequent CPU-hotplug event; invoking the stale callback can interrupt the host.

The record

CVE
CVE-2022-50510
Published
Oct 7, 2025
Updated
Oct 7, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 7, 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=5.2
  2. Affected versionversion=7d839b4b9e00645e49345d6ce5dfa8edf53c1a21 <359286f886feef38536eaa7e673dc3440f03b0a1
  3. Affected versionversion=7d839b4b9e00645e49345d6ce5dfa8edf53c1a21 <582babe17ea878ec1d76f30e03f3a6ce6e30eb91
  4. Affected versionversion=7d839b4b9e00645e49345d6ce5dfa8edf53c1a21 <6f2d566b46436a50a80d6445e82879686b89588c
  5. Affected versionversion=7d839b4b9e00645e49345d6ce5dfa8edf53c1a21 <b131304fe722853cf26e55c4fa21fc58a36e7f21
  6. Affected versionversion=7d839b4b9e00645e49345d6ce5dfa8edf53c1a21 <d69bdb61d577297d3851fc9f6403574bf73ef41f
  7. Affected versionversion=7d839b4b9e00645e49345d6ce5dfa8edf53c1a21 <f245ca9a0fe7f794a8187ad803d5e2ced5a11cb2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.2; version=7d839b4b9e00645e49345d6ce5dfa8edf53c1a21 <359286f886feef38536eaa7e673dc3440f03b0a1; version=7d839b4b9e00645e49345d6ce5dfa8edf53c1a21 <582babe17ea878ec1d76f30e03f3a6ce6e30eb91; version=7d839b4b9e00645e49345d6ce5dfa8edf53c1a21 <6f2d566b46436a50a80d6445e82879686b89588c; version=7d839b4b9e00645e49345d6ce5dfa8edf53c1a21 <b131304fe722853cf26e55c4fa21fc58a36e7f21; version=7d839b4b9e00645e49345d6ce5dfa8edf53c1a21 <d69bdb61d577297d3851fc9f6403574bf73ef41f; version=7d839b4b9e00645e49345d6ce5dfa8edf53c1a21 <f245ca9a0fe7f794a8187ad803d5e2ced5a11cb2

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 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-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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