CVE-2026-64101

Local availability loss via undersized PDS RPC

Published Jul 19, 2026 · Updated Jul 19, 2026

Out-of-bounds read in the PDS fwctl driver in Linux Kernel allows local users to cause unspecified availability loss via undersized RPC input. The pdsfc_fw_rpc() callback casts the allocation to struct fwctl_rpc_pds, and pdsfc_validate_rpc() reads its fields before confirming that in_len covers the structure. Reachability requires local access to a system exposing a PDS fwctl character device; the precise interruption mode is not disclosed, and no data disclosure or modification is reported.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds read in the PDS fwctl driver in Linux Kernel allows local users to cause unspecified availability loss via undersized RPC input. The pdsfc_fw_rpc() callback casts the allocation to struct fwctl_rpc_pds, and pdsfc_validate_rpc() reads its fields before confirming that in_len covers the structure. Reachability requires local access to a system exposing a PDS fwctl character device; the precise interruption mode is not disclosed, and no data disclosure or modification is reported.

The record

CVE
CVE-2026-64101
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 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=6.15
  2. Affected versionversion=92c66ee829b99a860a90f62ef16df3e42f92edac <0d470d36551058e3f728574308b815a80bca710f
  3. Affected versionversion=92c66ee829b99a860a90f62ef16df3e42f92edac <9e3f18883a98420a3b8873c6f894bc57e9b98e41
  4. Affected versionversion=92c66ee829b99a860a90f62ef16df3e42f92edac <e7537735028c3ad4b0bfc02ff8fa2a1a28aa04fe

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.15; version=92c66ee829b99a860a90f62ef16df3e42f92edac <0d470d36551058e3f728574308b815a80bca710f; version=92c66ee829b99a860a90f62ef16df3e42f92edac <9e3f18883a98420a3b8873c6f894bc57e9b98e41; version=92c66ee829b99a860a90f62ef16df3e42f92edac <e7537735028c3ad4b0bfc02ff8fa2a1a28aa04fe

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo