CVE-2024-46838
userfaultfd: don't BUG_ON() if khugepaged yanks our page table
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 27, 2024 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
1d65b771bc08cd054cf6d3766a72e113dc46d62f < 4a594acc12d5954cdc71d4450a386748bf3d136a 1d65b771bc08cd054cf6d3766a72e113dc46d62f < db978287e908d48b209e374b00d847b2d785e0a9 1d65b771bc08cd054cf6d3766a72e113dc46d62f < 4828d207dc5161dc7ddf9a4f6dcfd80c7dd7d20a
Linux / Linux
6.6