CVE-2024-57939

Local service interruption via sleep-capable die lock

Published Jan 21, 2025 · Updated May 11, 2026

Concurrency flaw in the Linux kernel allows local users to interrupt service by triggering a RISC-V exception on PREEMPT_RT. The RISC-V die() path acquires a sleep-capable spinlock while running in an exception handler, where sleeping is invalid. Exposure requires a RISC-V kernel built with PREEMPT_RT and a local user able to reach an exception path; the published impact is availability loss.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Concurrency flaw in the Linux kernel allows local users to interrupt service by triggering a RISC-V exception on PREEMPT_RT. The RISC-V die() path acquires a sleep-capable spinlock while running in an exception handler, where sleeping is invalid. Exposure requires a RISC-V kernel built with PREEMPT_RT and a local user able to reach an exception path; the published impact is availability loss.

The record

CVE
CVE-2024-57939
Published
Jan 21, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 21, 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=4.15
  2. Affected versionversion=76d2a0493a17d4c8ecc781366850c3c4f8e1a446 <10c24df2e303f517fab0359392c11b6b1d553f2b
  3. Affected versionversion=76d2a0493a17d4c8ecc781366850c3c4f8e1a446 <6a97f4118ac07cfdc316433f385dbdc12af5025e
  4. Affected versionversion=76d2a0493a17d4c8ecc781366850c3c4f8e1a446 <76ab0afcdbe8c9685b589016ee1c0e25fe596707
  5. Affected versionversion=76d2a0493a17d4c8ecc781366850c3c4f8e1a446 <8c38baa03ac8e18140faf36a3b955d30cad48e74
  6. Affected versionversion=76d2a0493a17d4c8ecc781366850c3c4f8e1a446 <c21df31fc2a4afc02a6e56511364e9e793ea92ec
  7. Affected versionversion=76d2a0493a17d4c8ecc781366850c3c4f8e1a446 <f48f060a4b36b5e96628f6c3fb1540f1e8dedb69

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.15; version=76d2a0493a17d4c8ecc781366850c3c4f8e1a446 <10c24df2e303f517fab0359392c11b6b1d553f2b; version=76d2a0493a17d4c8ecc781366850c3c4f8e1a446 <6a97f4118ac07cfdc316433f385dbdc12af5025e; version=76d2a0493a17d4c8ecc781366850c3c4f8e1a446 <76ab0afcdbe8c9685b589016ee1c0e25fe596707; version=76d2a0493a17d4c8ecc781366850c3c4f8e1a446 <8c38baa03ac8e18140faf36a3b955d30cad48e74; version=76d2a0493a17d4c8ecc781366850c3c4f8e1a446 <c21df31fc2a4afc02a6e56511364e9e793ea92ec; version=76d2a0493a17d4c8ecc781366850c3c4f8e1a446 <f48f060a4b36b5e96628f6c3fb1540f1e8dedb69

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS: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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