CVE-2023-53073

Local denial of service via uncleared overflow status

Published May 2, 2025 · Updated May 11, 2026

Improper status handling in the AMD PMU code in affected Linux kernels allows local users to interrupt service via performance events. In amd_pmu_v2_handle_irq(), a zero return from x86_perf_event_set_period() continues the loop after incrementing handled but before clearing the corresponding unhandled-overflow bit. Low-privileged local access and AMD PMU v2 overflow handling are required; repeated stale status processing can destabilize the kernel and deny availability.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper status handling in the AMD PMU code in affected Linux kernels allows local users to interrupt service via performance events. In amd_pmu_v2_handle_irq(), a zero return from x86_perf_event_set_period() continues the loop after incrementing handled but before clearing the corresponding unhandled-overflow bit. Low-privileged local access and AMD PMU v2 overflow handling are required; repeated stale status processing can destabilize the kernel and deny availability.

The record

CVE
CVE-2023-53073
Published
May 2, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 2, 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=5.19
  2. Affected versionversion=7685665c390dc68c2d9a74e8445f41494cc8f6cf <263f5ecaf7080513efc248ec739b6d9e00f4129f
  3. Affected versionversion=7685665c390dc68c2d9a74e8445f41494cc8f6cf <9d4c7b1f12e101d6d6253092588b127416ddfb6c
  4. Affected versionversion=7685665c390dc68c2d9a74e8445f41494cc8f6cf <ab33a8f7649b0324639a336e1081aaea51a4523e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=7685665c390dc68c2d9a74e8445f41494cc8f6cf <263f5ecaf7080513efc248ec739b6d9e00f4129f; version=7685665c390dc68c2d9a74e8445f41494cc8f6cf <9d4c7b1f12e101d6d6253092588b127416ddfb6c; version=7685665c390dc68c2d9a74e8445f41494cc8f6cf <ab33a8f7649b0324639a336e1081aaea51a4523e

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CanonicalCVSS: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

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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