Local denial of service via oversized page-cache allocation
Published Jul 29, 2024 · Updated May 11, 2026
Denial of service in the Linux kernel allows local users to trigger a kernel warning through file allocation and truncation on ARM64 systems. The filemap readahead path requests a PMD-sized page-cache folio of order 13 on 64 KB page systems even though xarray cannot represent an order above MAX_PAGECACHE_ORDER, so later splitting reaches xas_split_alloc with an unsupported order. Low-privilege local access is required; the warning can interrupt the host when panic-on-warning behavior is enabled.
Summary
What happened
Denial of service in the Linux kernel allows local users to trigger a kernel warning through file allocation and truncation on ARM64 systems. The filemap readahead path requests a PMD-sized page-cache folio of order 13 on 64 KB page systems even though xarray cannot represent an order above MAX_PAGECACHE_ORDER, so later splitting reaches xas_split_alloc with an unsupported order. Low-privilege local access is required; the warning can interrupt the host when panic-on-warning behavior is enabled.
The record
- CVE
- CVE-2024-41031
- Published
- Jul 29, 2024
- Updated
- May 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 29, 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?
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- Affected versionversion=4687fdbb805a92ce5a9f23042c436dc64fef8b77 <06b5a69c27ec405a3c3f2da8520ff1ee70b94a21
- Affected versionversion=4687fdbb805a92ce5a9f23042c436dc64fef8b77 <1ef650d3b1b2a16473981b447f38705fe9b93972
- Affected versionversion=4687fdbb805a92ce5a9f23042c436dc64fef8b77 <3390916aca7af1893ed2ebcdfee1d6fdb65bb058
- Affected versionversion=5.18
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Your stack
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