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CVE-2026-23375 affects transparent huge page (THP) eligibility checks in the Linux kernel's file_thp_enabled() function. Anonymous-inode files, including guest_memfd and secretmem, are created through alloc_file_pseudo() without incrementing inode->i_writecount. When CONFIG_READ_ONLY_THP_FOR_FS is enabled, their regular-file mode and zero write count incorrectly make them eligible for read-only file THP collapse. For guest_memfd, collapse creates large folios that its fault handler does not support, triggering a kernel warning. For secretmem, collapse_file() attempts to copy pages through the direct map despite those pages having been removed from it, potentially causing a kernel crash. Upstream secretmem memory-failure recovery prevents the crash but still generates false memory-failure reports.
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A Linux kernel memory-management vulnerability addressed by denying transparent huge pages for files on anonymous inodes. The advisory identifies affected Rocky Linux 10.2 kernel packages and provides an update recommendation.
A Linux kernel transparent huge page (THP) eligibility flaw incorrectly permits THP collapse for anonymous-inode files. For guest_memfd, this creates unsupported large folios and triggers kernel warnings. For secretmem, copying pages through an unavailable direct mapping can crash affected kernels; upstream recovery avoids the crash but still produces false memory-failure reports. The advisory assigns CVSS v3 severity 5.5, with local access, low privileges, and an availability impact. The fix excludes anonymous-inode files from THP eligibility.
A Linux kernel transparent huge page (THP) eligibility flaw incorrectly permits anonymous-inode files to undergo THP collapse. For guest_memfd, this creates unsupported large folios and triggers a kernel warning. For secretmem, it can cause a kernel crash; upstream handles the failed copy gracefully but still produces false memory-failure reports. The reference assigns CVSS v3 severity of 5.5, with local access, low privileges, and high availability impact.
A Linux kernel memory-management vulnerability involving transparent huge pages for files on anonymous inodes.
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Cross-references every affected SKU, including bundled OEM variants.
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