Local kernel panic via stale allocation error pointer
Published Oct 21, 2024 · Updated May 11, 2026
A race condition in Linux 6.11 through 6.11.2 allows local users to trigger a kernel panic through concurrent hugetlb page allocation. In mm/gup.c, memfd_pin_folios retains the -EEXIST error pointer returned when another thread creates the same folio, then passes it to folio_put on the next loop iteration. Low-privileged local access and winning the allocation race are required; successful exploitation crashes the host without reported data exposure or modification.
Summary
What happened
A race condition in Linux 6.11 through 6.11.2 allows local users to trigger a kernel panic through concurrent hugetlb page allocation. In mm/gup.c, memfd_pin_folios retains the -EEXIST error pointer returned when another thread creates the same folio, then passes it to folio_put on the next loop iteration. Low-privileged local access and winning the allocation race are required; successful exploitation crashes the host without reported data exposure or modification.
The record
- CVE
- CVE-2024-49872
- Published
- Oct 21, 2024
- Updated
- May 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-362
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 21, 2024CVE publishedPublication date reported by the CVE source.
- May 11, 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.
- Affected versionversion=6.11
- Affected versionversion=89c1905d9c140372b7f50ef48f42378cf85d9bc5 <ce645b9fdc78ec5d28067286e92871ddae6817d5
- Affected versionversion=89c1905d9c140372b7f50ef48f42378cf85d9bc5 <e28f39b359c0cfdcc011603e51187085a5f1e5e3
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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