Vulnerability Details : CVE-2024-46838
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.
Products affected by CVE-2024-46838
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2024-46838
0.03%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 8 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2024-46838
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST | 2024-10-09 |
References for CVE-2024-46838
-
https://git.kernel.org/stable/c/db978287e908d48b209e374b00d847b2d785e0a9
userfaultfd: don't BUG_ON() if khugepaged yanks our page table - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/4a594acc12d5954cdc71d4450a386748bf3d136a
userfaultfd: don't BUG_ON() if khugepaged yanks our page table - kernel/git/stable/linux.git - Linux kernel stable treePatch
-
https://git.kernel.org/stable/c/4828d207dc5161dc7ddf9a4f6dcfd80c7dd7d20a
userfaultfd: don't BUG_ON() if khugepaged yanks our page table - kernel/git/stable/linux.git - Linux kernel stable treePatch
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