CVE-2025-39762

Local system crash via unchecked display link

Published Sep 11, 2025 · Updated May 11, 2026

NULL pointer dereference in affected Linux kernels allows local users to crash the system through the AMD display driver. dc_get_host_router_index dereferences link to obtain link->ctx->dc before validating link or the host_router_index output pointer. Reachability requires a low-privilege local user and an affected AMD display path; the reported consequence is availability loss only.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in affected Linux kernels allows local users to crash the system through the AMD display driver. dc_get_host_router_index dereferences link to obtain link->ctx->dc before validating link or the host_router_index output pointer. Reachability requires a low-privilege local user and an affected AMD display path; the reported consequence is availability loss only.

The record

CVE
CVE-2025-39762
Published
Sep 11, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 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=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <10d97cc1a14ef1f611e156b0b27e8b226e103cc2
  3. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <13895744e2c639324cf3cb18f2ba4e3f400dd0dd
  4. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <158b9201c17fc93ed4253c2f03b77fd2671669a1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.15; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <10d97cc1a14ef1f611e156b0b27e8b226e103cc2; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <13895744e2c639324cf3cb18f2ba4e3f400dd0dd; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <158b9201c17fc93ed4253c2f03b77fd2671669a1

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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