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.
Metrics
Affected Vendors & Products
References
History
Wed, 09 Oct 2024 16:00:00 +0000
Type | Values Removed | Values Added |
---|---|---|
First Time appeared |
Linux
Linux linux Kernel |
|
Weaknesses | NVD-CWE-noinfo | |
CPEs | 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:*:*:*:*:*:* |
|
Vendors & Products |
Linux
Linux linux Kernel |
Sun, 29 Sep 2024 14:30:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Metrics |
ssvc
|
Sat, 28 Sep 2024 01:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
References |
| |
Metrics |
threat_severity
|
cvssV3_1
|
Fri, 27 Sep 2024 12:45:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Description | 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. | |
Title | userfaultfd: don't BUG_ON() if khugepaged yanks our page table | |
References |
|
MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2024-09-27T12:39:33.755Z
Updated: 2024-11-05T09:47:36.343Z
Reserved: 2024-09-11T15:12:18.288Z
Link: CVE-2024-46838
Vulnrichment
Updated: 2024-09-29T14:03:07.337Z
NVD
Status : Analyzed
Published: 2024-09-27T13:15:15.920
Modified: 2024-10-09T15:35:40.827
Link: CVE-2024-46838
Redhat