CVE-2024-46838 (GCVE-0-2024-46838)
Vulnerability from cvelistv5
Published
2024-09-27 12:39
Modified
2026-05-11 20:37
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: userfaultfd: don't BUG_ON() if khugepaged yanks our page table Since khugepaged was changed to allow retracting page tables in file mappings without holding the mmap lock, these BUG_ON()s are wrong - get rid of them. We could also remove the preceding "if (unlikely(...))" block, but then we could reach pte_offset_map_lock() with transhuge pages not just for file mappings but also for anonymous mappings - which would probably be fine but I think is not necessarily expected.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1d65b771bc08cd054cf6d3766a72e113dc46d62f
Version: 1d65b771bc08cd054cf6d3766a72e113dc46d62f
Version: 1d65b771bc08cd054cf6d3766a72e113dc46d62f
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