CVE-2026-53285

Local kernel crash via softirq-disabled allocation

Published Jun 26, 2026 · Updated Jun 26, 2026

Reachable assertion in Linux Kernel 6.0 through 7.0.9 and 7.1 release candidates allows local users to crash the kernel during AMD DCN32 validation. The DML1 phantom-plane path calls kvzalloc for a roughly 335 KiB dc_plane_state while fpregs_lock has disabled softirqs, causing vmalloc to reach BUG_ON(in_interrupt()). Exploitation requires a low-privileged local session, an x86 non-RT kernel, and affected AMD DCN32 display hardware; the reported consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reachable assertion in Linux Kernel 6.0 through 7.0.9 and 7.1 release candidates allows local users to crash the kernel during AMD DCN32 validation. The DML1 phantom-plane path calls kvzalloc for a roughly 335 KiB dc_plane_state while fpregs_lock has disabled softirqs, causing vmalloc to reach BUG_ON(in_interrupt()). Exploitation requires a low-privileged local session, an x86 non-RT kernel, and affected AMD DCN32 display hardware; the reported consequence is a kernel crash.

The record

CVE
CVE-2026-53285
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-617, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 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=235c67634230b0f9ad8c0185272fed36c892b1c4 <183182235f6d53bac62c6c39014738a54a68dfa6
  2. Affected versionversion=235c67634230b0f9ad8c0185272fed36c892b1c4 <30bb2ec6695d62f63db4aa6179c4626834ed0cd6
  3. Affected versionversion=6.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=235c67634230b0f9ad8c0185272fed36c892b1c4 <183182235f6d53bac62c6c39014738a54a68dfa6; version=235c67634230b0f9ad8c0185272fed36c892b1c4 <30bb2ec6695d62f63db4aa6179c4626834ed0cd6; version=6.0

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-617Reachable Assertion
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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