CVE-2026-52975

Kernel memory unsafety via aggregator pointer data race

Published Jun 24, 2026 · Updated Jun 24, 2026

An RCU data race in Linux Kernel allows local users to trigger unsynchronized access to the 802.3ad aggregator pointer. bond_3ad_state_machine_handler can replace port->aggregator while bond_3ad_get_active_agg_info reads it because the pointer was accessed without the required RCU primitives. Reachability requires local interaction with the bonding driver's 802.3ad path, and the disclosed evidence demonstrates concurrent pointer access rather than a specific crash or compromise.

CVSS severity7.8
High
EPSS probability0.14%
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

An RCU data race in Linux Kernel allows local users to trigger unsynchronized access to the 802.3ad aggregator pointer. bond_3ad_state_machine_handler can replace port->aggregator while bond_3ad_get_active_agg_info reads it because the pointer was accessed without the required RCU primitives. Reachability requires local interaction with the bonding driver's 802.3ad path, and the disclosed evidence demonstrates concurrent pointer access rather than a specific crash or compromise.

The record

CVE
CVE-2026-52975
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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=3.13
  2. Affected versionversion=47e91f56008b43e1365e8d1d4a6813fe8a33b6f6 <3b7265b3a82f40d2357c4004b26eb794a095b186
  3. Affected versionversion=47e91f56008b43e1365e8d1d4a6813fe8a33b6f6 <78f409fd34fe9de2b24ad8e9dca1b4608a48ed3d
  4. Affected versionversion=47e91f56008b43e1365e8d1d4a6813fe8a33b6f6 <ba2272be04f0cb1e74e1e355ff32ef95df280731
  5. Affected versionversion=47e91f56008b43e1365e8d1d4a6813fe8a33b6f6 <c169c5837525ad842df6a542facf52b6f866a519
  6. Affected versionversion=47e91f56008b43e1365e8d1d4a6813fe8a33b6f6 <c4f050ce06c56cfb5993268af4a5cb66ed1cd04e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.13; version=47e91f56008b43e1365e8d1d4a6813fe8a33b6f6 <3b7265b3a82f40d2357c4004b26eb794a095b186; version=47e91f56008b43e1365e8d1d4a6813fe8a33b6f6 <78f409fd34fe9de2b24ad8e9dca1b4608a48ed3d; version=47e91f56008b43e1365e8d1d4a6813fe8a33b6f6 <ba2272be04f0cb1e74e1e355ff32ef95df280731; version=47e91f56008b43e1365e8d1d4a6813fe8a33b6f6 <c169c5837525ad842df6a542facf52b6f866a519; version=47e91f56008b43e1365e8d1d4a6813fe8a33b6f6 <c4f050ce06c56cfb5993268af4a5cb66ed1cd04e

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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

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

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