CVE-2024-42140

System hang via kexec crash-path deadlock

Published Jul 30, 2024 · Updated May 23, 2026

Improper locking in the RISC-V kexec crash path in affected Linux kernels allows local users to hang the system during a crash. machine_kexec_mask_interrupts() acquires an IRQ descriptor spinlock and then calls irq_set_irqchip_state(), which attempts incompatible interrupt-controller state handling and deadlocks. Reachability requires a RISC-V system whose kexec crash code runs in interrupt context; the documented consequence is an availability-only system hang.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the RISC-V kexec crash path in affected Linux kernels allows local users to hang the system during a crash. machine_kexec_mask_interrupts() acquires an IRQ descriptor spinlock and then calls irq_set_irqchip_state(), which attempts incompatible interrupt-controller state handling and deadlocks. Reachability requires a RISC-V system whose kexec crash code runs in interrupt context; the documented consequence is an availability-only system hang.

The record

CVE
CVE-2024-42140
Published
Jul 30, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 30, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=12f237200c169a8667cf9dca7a40df8d7917b9fd <bb80a7911218bbab2a69b5db7d2545643ab0073d
  2. Affected versionversion=5.15.82 <5.15.163
  3. Affected versionversion=6.0.12 <6.1
  4. Affected versionversion=6.1
  5. Affected versionversion=7594956fec8902dfc18150bf1dca0940cd4ad025
  6. Affected versionversion=b17d19a5314a37f7197afd1a0200affd21a7227d <484dd545271d02d1571e1c6b62ea7df9dbe5e692
  7. Affected versionversion=b17d19a5314a37f7197afd1a0200affd21a7227d <653deee48a4682ea17a05b96fb6842795ab5943c
  8. Affected versionversion=b17d19a5314a37f7197afd1a0200affd21a7227d <7692c9b6baacdee378435f58f19baf0eb69e4155
  9. Affected versionversion=b17d19a5314a37f7197afd1a0200affd21a7227d <c562ba719df570c986caf0941fea2449150bcbc4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=12f237200c169a8667cf9dca7a40df8d7917b9fd <bb80a7911218bbab2a69b5db7d2545643ab0073d; version=5.15.82 <5.15.163; version=6.0.12 <6.1; version=6.1; version=7594956fec8902dfc18150bf1dca0940cd4ad025; version=b17d19a5314a37f7197afd1a0200affd21a7227d <484dd545271d02d1571e1c6b62ea7df9dbe5e692; version=b17d19a5314a37f7197afd1a0200affd21a7227d <653deee48a4682ea17a05b96fb6842795ab5943c; version=b17d19a5314a37f7197afd1a0200affd21a7227d <7692c9b6baacdee378435f58f19baf0eb69e4155; version=b17d19a5314a37f7197afd1a0200affd21a7227d <c562ba719df570c986caf0941fea2449150bcbc4

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-667Improper Locking
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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