CVE-2026-31646

Kernel oops via unchecked page-pool error pointer

Published Apr 24, 2026 · Updated Apr 24, 2026

NULL pointer dereference in the Linux Kernel LAN966x driver allows local users to trigger a kernel oops and interrupt service. In lan966x_fdma_rx_alloc_page_pool(), a failed page_pool_create() returns an error pointer that reaches page_pool_use_xdp_mem() and is dereferenced. Exploitation requires local low-privileged access and an affected kernel exercising the LAN966x receive allocation path; the documented impact is availability loss only.

CVSS severity5.5
Medium
EPSS probability0.12%
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 Kernel LAN966x driver allows local users to trigger a kernel oops and interrupt service. In lan966x_fdma_rx_alloc_page_pool(), a failed page_pool_create() returns an error pointer that reaches page_pool_use_xdp_mem() and is dereferenced. Exploitation requires local low-privileged access and an affected kernel exercising the LAN966x receive allocation path; the documented impact is availability loss only.

The record

CVE
CVE-2026-31646
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 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=11871aba19748b3387e83a2db6360aa7119e9a1a <305832c53551cfbe6e5b81ca7ee765e60f4fe8e9
  2. Affected versionversion=11871aba19748b3387e83a2db6360aa7119e9a1a <3fd0da4fd8851a7e62d009b7db6c4a05b092bc19
  3. Affected versionversion=11871aba19748b3387e83a2db6360aa7119e9a1a <7caf90d9ab97951a58d1de85ab7e7d7cca7a4513
  4. Affected versionversion=11871aba19748b3387e83a2db6360aa7119e9a1a <b5dcb41ba891b55157006cac79825c78a32b409e
  5. Affected versionversion=11871aba19748b3387e83a2db6360aa7119e9a1a <e63265f188ea39dcf5f546770650027528f3bd0f
  6. Affected versionversion=6.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=11871aba19748b3387e83a2db6360aa7119e9a1a <305832c53551cfbe6e5b81ca7ee765e60f4fe8e9; version=11871aba19748b3387e83a2db6360aa7119e9a1a <3fd0da4fd8851a7e62d009b7db6c4a05b092bc19; version=11871aba19748b3387e83a2db6360aa7119e9a1a <7caf90d9ab97951a58d1de85ab7e7d7cca7a4513; version=11871aba19748b3387e83a2db6360aa7119e9a1a <b5dcb41ba891b55157006cac79825c78a32b409e; version=11871aba19748b3387e83a2db6360aa7119e9a1a <e63265f188ea39dcf5f546770650027528f3bd0f; version=6.2

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 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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