Kernel memory corruption via unlocked MMU notification
Published Feb 29, 2024 · Updated Aug 5, 2026
Race condition in Linux 6.7 through 6.7.2 allows local users to corrupt kernel memory through a PAGEMAP_SCAN ioctl race. In do_pagemap_scan, invalidation notification began outside the mmap write lock, allowing concurrent notifier registration to break start-and-end pairing and invalidate different ranges. Exploitation requires a registered MMU-notifier component and coordinated local threads; stale secondary mappings can expose or modify host memory, crash the kernel, or hang guests.
Summary
What happened
Race condition in Linux 6.7 through 6.7.2 allows local users to corrupt kernel memory through a PAGEMAP_SCAN ioctl race. In do_pagemap_scan, invalidation notification began outside the mmap write lock, allowing concurrent notifier registration to break start-and-end pairing and invalidate different ranges. Exploitation requires a registered MMU-notifier component and coordinated local threads; stale secondary mappings can expose or modify host memory, crash the kernel, or hang guests.
The record
- CVE
- CVE-2024-26617
- Published
- Feb 29, 2024
- Updated
- Aug 5, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-362, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 29, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 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.
- Affected versionversion=52526ca7fdb905a768a93f8faa418e9b988fc34b <05509adf297924f51e1493aa86f9fcde1433ed80
- Affected versionversion=52526ca7fdb905a768a93f8faa418e9b988fc34b <4cccb6221cae6d020270606b9e52b1678fc8b71a
- Affected versionversion=6.7
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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