CVE-2026-97599Hinoki check available

Local kernel memory corruption via PIB update race

Published Sep 25, 2026 · Updated Sep 25, 2026

A double-free race in affected Linux kernel revisions allows local users to corrupt kernel memory through concurrent mac802154_hwsim PIB updates. The hwsim_update_pib() path reads, replaces, and schedules the prior phy->pib object for RCU freeing without serializing callers, so two threads can free the same object. The trigger requires local netlink operations with CAP_NET_ADMIN, obtainable in an enabled user namespace; failed exploitation can crash the kernel, while controlled heap reuse grants elevated execution.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

A double-free race in affected Linux kernel revisions allows local users to corrupt kernel memory through concurrent mac802154_hwsim PIB updates. The hwsim_update_pib() path reads, replaces, and schedules the prior phy->pib object for RCU freeing without serializing callers, so two threads can free the same object. The trigger requires local netlink operations with CAP_NET_ADMIN, obtainable in an enabled user namespace; failed exploitation can crash the kernel, while controlled heap reuse grants elevated execution.

The record

CVE
CVE-2026-97599
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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=4.19
  2. Affected versionversion=f25da51fdc381ca2863248c7060b3662632f0872 <979d5b8de8ed4e1f997aef12da5694b99be7b871
  3. Affected versionversion=f25da51fdc381ca2863248c7060b3662632f0872 <9973b3a67a7592a780ea12b08334539a900deec1
  4. Affected versionversion=f25da51fdc381ca2863248c7060b3662632f0872 <d3b8f264ce09573aededd0a97dc41c8147797d8f
  5. Affected versionversion=f25da51fdc381ca2863248c7060b3662632f0872 <db6442deecb1f13aeaf4f9d77746ea7555630fb3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.19; version=f25da51fdc381ca2863248c7060b3662632f0872 <979d5b8de8ed4e1f997aef12da5694b99be7b871; version=f25da51fdc381ca2863248c7060b3662632f0872 <9973b3a67a7592a780ea12b08334539a900deec1; version=f25da51fdc381ca2863248c7060b3662632f0872 <d3b8f264ce09573aededd0a97dc41c8147797d8f; version=f25da51fdc381ca2863248c7060b3662632f0872 <db6442deecb1f13aeaf4f9d77746ea7555630fb3

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

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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