CVE-2024-43865

Local kernel crash via unhandled FPU exception

Published Aug 20, 2024 · Updated May 11, 2026

Improper exception handling in Linux 6.9 through 6.10.3 allows local users to crash s390 systems via invalid FPU state. The s390 load_fpu_state() path executes the lfpc instruction on an invalid floating-point control value without the exception-table handler needed to absorb the resulting specification exception. Exploitation requires local low-privileged access on IBM s390 hardware and interrupts the host, with no reported confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper exception handling in Linux 6.9 through 6.10.3 allows local users to crash s390 systems via invalid FPU state. The s390 load_fpu_state() path executes the lfpc instruction on an invalid floating-point control value without the exception-table handler needed to absorb the resulting specification exception. Exploitation requires local low-privileged access on IBM s390 hardware and interrupts the host, with no reported confidentiality or integrity impact.

The record

CVE
CVE-2024-43865
Published
Aug 20, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 20, 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=6.9
  2. Affected versionversion=8c09871a950a3fe686e0e27fd4193179c5f74f37 <4734406c39238cbeafe66f0060084caa3247ff53
  3. Affected versionversion=8c09871a950a3fe686e0e27fd4193179c5f74f37 <494b14138201f07343e5488db6360c828fcc8cf6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.9; version=8c09871a950a3fe686e0e27fd4193179c5f74f37 <4734406c39238cbeafe66f0060084caa3247ff53; version=8c09871a950a3fe686e0e27fd4193179c5f74f37 <494b14138201f07343e5488db6360c828fcc8cf6

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

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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