CVE-2025-39934

Kernel crash via prematurely enabled bridge interrupt

Published Oct 4, 2025 · Updated Oct 4, 2025

NULL pointer dereference in the Linux ANX7625 DRM bridge driver allows local users to crash the kernel through an early interrupt. anx7625_i2c_probe enables the threaded interrupt before its workqueue and I2C resources, including tcpc_client, are ready. Exploitation requires local low-privileged access and affected ANX7625 hardware; the bounded consequence is an availability-only kernel crash.

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 the Linux ANX7625 DRM bridge driver allows local users to crash the kernel through an early interrupt. anx7625_i2c_probe enables the threaded interrupt before its workqueue and I2C resources, including tcpc_client, are ready. Exploitation requires local low-privileged access and affected ANX7625 hardware; the bounded consequence is an availability-only kernel crash.

The record

CVE
CVE-2025-39934
Published
Oct 4, 2025
Updated
Oct 4, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 4, 2025Record 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=5.11
  2. Affected versionversion=8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 <0da73f7827691a5e2265b110d5fe12f29535ec92
  3. Affected versionversion=8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 <15a77e1ab0a994d69b471c76b8d01117128dda26
  4. Affected versionversion=8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 <1a7ea294d57fb61485d11b3f2241d631d73025cb
  5. Affected versionversion=8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 <51a501e990a353a4f15da6bab295b28e5d118f64
  6. Affected versionversion=8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 <a10f910c77f280327b481e77eab909934ec508f0
  7. Affected versionversion=8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 <f9a089d0a6d537d0f2061c8a37a7de535ce0310e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.11; version=8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 <0da73f7827691a5e2265b110d5fe12f29535ec92; version=8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 <15a77e1ab0a994d69b471c76b8d01117128dda26; version=8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 <1a7ea294d57fb61485d11b3f2241d631d73025cb; version=8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 <51a501e990a353a4f15da6bab295b28e5d118f64; version=8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 <a10f910c77f280327b481e77eab909934ec508f0; version=8bdfc5dae4e3ba4d99dfb430ef43249e5f1b7730 <f9a089d0a6d537d0f2061c8a37a7de535ce0310e

Published CVSS scores

5.5Amazon LinuxCVSS: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-476NULL Pointer Dereference

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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