CVE-2026-53011

Local kernel memory corruption via stale taprio entry

Published Jun 24, 2026 · Updated Jun 24, 2026

Use-after-free in affected Linux Kernel branches starting at 5.2 allows local users to corrupt kernel memory during a taprio schedule switch. In advance_sched(), switch_schedules() queues the old operational schedule for RCU freeing but leaves next pointing to its entry, which is then written through and assigned as q->current_entry. The attack is local, requires low privileges and a configured taprio schedule transition, and can compromise kernel memory without user interaction.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in affected Linux Kernel branches starting at 5.2 allows local users to corrupt kernel memory during a taprio schedule switch. In advance_sched(), switch_schedules() queues the old operational schedule for RCU freeing but leaves next pointing to its entry, which is then written through and assigned as q->current_entry. The attack is local, requires low privileges and a configured taprio schedule transition, and can compromise kernel memory without user interaction.

The record

CVE
CVE-2026-53011
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1068
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

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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=5.2
  2. Affected versionversion=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <0e62171df8ed4804d00db088f17eed06468233fa
  3. Affected versionversion=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <105425b1969c5affe532713cfac1c0b320d7ac2b
  4. Affected versionversion=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <1bd286fa3e21200133478ed523cc6a2788baf38a
  5. Affected versionversion=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <3471874578160a28c171a607fa069f24062634b8
  6. Affected versionversion=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <7256996e1ef553716817f3bfd077c2f3b48b582f
  7. Affected versionversion=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <a8fc396519ef4f081bc545e88f61241728bb78d7
  8. Affected versionversion=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <b73235da5dde77ed1264f9767b62c28c9d71fd78
  9. Affected versionversion=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <eee072fe16c646190d33ae69c9983d8de1562bf8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.2; version=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <0e62171df8ed4804d00db088f17eed06468233fa; version=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <105425b1969c5affe532713cfac1c0b320d7ac2b; version=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <1bd286fa3e21200133478ed523cc6a2788baf38a; version=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <3471874578160a28c171a607fa069f24062634b8; version=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <7256996e1ef553716817f3bfd077c2f3b48b582f; version=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <a8fc396519ef4f081bc545e88f61241728bb78d7; version=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <b73235da5dde77ed1264f9767b62c28c9d71fd78; version=a3d43c0d56f1b94e74963a2fbadfb70126d92213 <eee072fe16c646190d33ae69c9983d8de1562bf8

Published CVSS scores

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.

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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-416Use After Free
T1068Exploitation for Privilege Escalation

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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