CVE-2025-68259Public exploit

Guest kernel panic via stale INTn decoding

Published Dec 16, 2025 · Updated Dec 16, 2025

Incorrect interrupt handling in Linux KVM SVM allows attackers to crash a guest by racing software-interrupt decoding. KVM fails to verify that the decoded INTn still matches the instruction executed before another vCPU changed the code stream, then advances to an incorrect RIP. Affected kernels begin at 6.0 and require AMD SVM virtualization; deliberate reproduction uses modified guest behavior and host-side TSS swapping.

CVSS severityUnavailable
Unscored
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

Incorrect interrupt handling in Linux KVM SVM allows attackers to crash a guest by racing software-interrupt decoding. KVM fails to verify that the decoded INTn still matches the instruction executed before another vCPU changed the code stream, then advances to an incorrect RIP. Affected kernels begin at 6.0 and require AMD SVM virtualization; deliberate reproduction uses modified guest behavior and host-side TSS swapping.

The record

CVE
CVE-2025-68259
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 2025Record 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=6.0
  2. Affected versionversion=6ef88d6e36c2b4b3886ec9967cafabe4424d27d5 <4da3768e1820cf15cced390242d8789aed34f54d
  3. Affected versionversion=6ef88d6e36c2b4b3886ec9967cafabe4424d27d5 <53903ac9ca1abffa27327e85075ec496fa55ccf3
  4. Affected versionversion=6ef88d6e36c2b4b3886ec9967cafabe4424d27d5 <54bcccc2c7805a00af1d7d2faffd6f424c0133aa
  5. Affected versionversion=6ef88d6e36c2b4b3886ec9967cafabe4424d27d5 <87cc1622c88a4888959d64fa1fc9ba1e264aa3d4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=6.0; version=6ef88d6e36c2b4b3886ec9967cafabe4424d27d5 <4da3768e1820cf15cced390242d8789aed34f54d; version=6ef88d6e36c2b4b3886ec9967cafabe4424d27d5 <53903ac9ca1abffa27327e85075ec496fa55ccf3; version=6ef88d6e36c2b4b3886ec9967cafabe4424d27d5 <54bcccc2c7805a00af1d7d2faffd6f424c0133aa; version=6ef88d6e36c2b4b3886ec9967cafabe4424d27d5 <87cc1622c88a4888959d64fa1fc9ba1e264aa3d4

Published CVSS scores

No CVSS assessment is available in this record.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

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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