CVE-2024-46848

Local denial of service via undersized perf periods

Published Sep 27, 2024 · Updated May 11, 2026

Denial of service in the Linux kernel on Haswell systems allows local users to hang perf interrupt handling through crafted perf events. The perf frequency-estimation path initializes the sampling period to 1, below the HSW11 minimum and the threshold where simultaneous counter expirations trap the NMI handler in an IRQ loop. Exploitation requires local perf-event access on an Intel Haswell CPU; the reported consequence is service interruption without data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.22%
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 on Haswell systems allows local users to hang perf interrupt handling through crafted perf events. The perf frequency-estimation path initializes the sampling period to 1, below the HSW11 minimum and the threshold where simultaneous counter expirations trap the NMI handler in an IRQ loop. Exploitation requires local perf-event access on an Intel Haswell CPU; the reported consequence is service interruption without data disclosure or modification.

The record

CVE
CVE-2024-46848
Published
Sep 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 27, 2024CVE 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=3.11
  2. Affected versionversion=3a632cb229bfb18b6d09822cc842451ea46c013e <0eaf812aa1506704f3b78be87036860e5d0fe81d
  3. Affected versionversion=3a632cb229bfb18b6d09822cc842451ea46c013e <15210b7c8caff4929f25d049ef8404557f8ae468
  4. Affected versionversion=3a632cb229bfb18b6d09822cc842451ea46c013e <25dfc9e357af8aed1ca79b318a73f2c59c1f0b2b
  5. Affected versionversion=3a632cb229bfb18b6d09822cc842451ea46c013e <8717dc35c0e5896f4110f4b3882f7ff787a5f73d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.11; version=3a632cb229bfb18b6d09822cc842451ea46c013e <0eaf812aa1506704f3b78be87036860e5d0fe81d; version=3a632cb229bfb18b6d09822cc842451ea46c013e <15210b7c8caff4929f25d049ef8404557f8ae468; version=3a632cb229bfb18b6d09822cc842451ea46c013e <25dfc9e357af8aed1ca79b318a73f2c59c1f0b2b; version=3a632cb229bfb18b6d09822cc842451ea46c013e <8717dc35c0e5896f4110f4b3882f7ff787a5f73d

Published CVSS scores

5.5NISTCVSS: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.

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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

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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