CVE-2025-40033

Kernel fault via premature rproc dereference

Published Oct 28, 2025 · Updated Oct 28, 2025

NULL pointer dereference in the Linux PRU remoteproc driver allows attackers to fault the kernel via pru_rproc_set_ctable(). The function reads rproc->priv before checking whether rproc is NULL or an error pointer, so an invalid rproc reaches a pointer dereference. Linux has not published how attackers can reach this call or whether the resulting kernel fault reliably causes a crash.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
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 PRU remoteproc driver allows attackers to fault the kernel via pru_rproc_set_ctable(). The function reads rproc->priv before checking whether rproc is NULL or an error pointer, so an invalid rproc reaches a pointer dereference. Linux has not published how attackers can reach this call or whether the resulting kernel fault reliably causes a crash.

The record

CVE
CVE-2025-40033
Published
Oct 28, 2025
Updated
Oct 28, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 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=102853400321baea2527917e6e89be33508c3e18 <66821fdb723d55b25482a76b92d17d416efeae6b
  2. Affected versionversion=102853400321baea2527917e6e89be33508c3e18 <c9b6d789591f2bd57b0cbd59592493e11e029ed4
  3. Affected versionversion=102853400321baea2527917e6e89be33508c3e18 <d41e075b077142bb9ae5df40b9ddf9fd7821a811
  4. Affected versionversion=102853400321baea2527917e6e89be33508c3e18 <f0164d89950120281f2446be9687cffa1e43dbcc
  5. Affected versionversion=6.3

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=102853400321baea2527917e6e89be33508c3e18 <66821fdb723d55b25482a76b92d17d416efeae6b; version=102853400321baea2527917e6e89be33508c3e18 <c9b6d789591f2bd57b0cbd59592493e11e029ed4; version=102853400321baea2527917e6e89be33508c3e18 <d41e075b077142bb9ae5df40b9ddf9fd7821a811; version=102853400321baea2527917e6e89be33508c3e18 <f0164d89950120281f2446be9687cffa1e43dbcc; version=6.3

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

Weakness, pattern, technique

No sourced classifications are available.

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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