CVE-2025-21713

Local system crash via NULL table cleanup

Published Feb 27, 2025 · Updated May 11, 2026

NULL pointer dereference in Linux kernel 6.11 through 6.12.12 and 6.13 through 6.13.1 allows local users to crash pSeries hosts via a VFIO group attach. After spapr_tce_set_window rejects reuse of a VFIO container across IOMMU groups, cleanup passes an unset tbl pointer to spapr_tce_unset_window. Low-privileged local access to the affected pSeries VFIO path is required; the resulting kernel oops interrupts the host service.

CVSS severity5.5
Medium
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 Linux kernel 6.11 through 6.12.12 and 6.13 through 6.13.1 allows local users to crash pSeries hosts via a VFIO group attach. After spapr_tce_set_window rejects reuse of a VFIO container across IOMMU groups, cleanup passes an unset tbl pointer to spapr_tce_unset_window. Low-privileged local access to the affected pSeries VFIO path is required; the resulting kernel oops interrupts the host service.

The record

CVE
CVE-2025-21713
Published
Feb 27, 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. Feb 27, 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

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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=6.11
  2. Affected versionversion=f431a8cde7f102fce412546db6e62fdbde1131a7 <17391cb2613b82f8c405570fea605af3255ff8d2
  3. Affected versionversion=f431a8cde7f102fce412546db6e62fdbde1131a7 <ac12372a13dab3f7a2762db240bd180de8ef1e5e
  4. Affected versionversion=f431a8cde7f102fce412546db6e62fdbde1131a7 <b853ff0b514c1df314246fcf94744005914b48cb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=f431a8cde7f102fce412546db6e62fdbde1131a7 <17391cb2613b82f8c405570fea605af3255ff8d2; version=f431a8cde7f102fce412546db6e62fdbde1131a7 <ac12372a13dab3f7a2762db240bd180de8ef1e5e; version=f431a8cde7f102fce412546db6e62fdbde1131a7 <b853ff0b514c1df314246fcf94744005914b48cb

Published CVSS scores

5.5NVDCVSS: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
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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