In the Linux kernel, the following vulnerability has been resolved:
mm/ksm: fix race with VMA iteration and mm_struct teardown
exit_mmap() will tear down the VMAs and maple tree with the mmap_lock held
in write mode. Ensure that the maple tree is still valid by checking
ksm_test_exit() after taking the mmap_lock in read mode, but before the
for_each_vma() iterator dereferences a destroyed maple tree.
Since the maple tree is destroyed, the flags telling lockdep to check an
external lock has been cleared. Skip the for_each_vma() iterator to avoid
dereferencing a maple tree without the external lock flag, which would
create a lockdep warning.
Metrics
Affected Vendors & Products
References
History
Sat, 04 Oct 2025 16:00:00 +0000
Type | Values Removed | Values Added |
---|---|---|
Description | In the Linux kernel, the following vulnerability has been resolved: mm/ksm: fix race with VMA iteration and mm_struct teardown exit_mmap() will tear down the VMAs and maple tree with the mmap_lock held in write mode. Ensure that the maple tree is still valid by checking ksm_test_exit() after taking the mmap_lock in read mode, but before the for_each_vma() iterator dereferences a destroyed maple tree. Since the maple tree is destroyed, the flags telling lockdep to check an external lock has been cleared. Skip the for_each_vma() iterator to avoid dereferencing a maple tree without the external lock flag, which would create a lockdep warning. | |
Title | mm/ksm: fix race with VMA iteration and mm_struct teardown | |
References |
|

Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2025-10-04T15:44:21.671Z
Reserved: 2025-10-04T15:40:38.481Z
Link: CVE-2023-53614

No data.

Status : Received
Published: 2025-10-04T16:15:58.227
Modified: 2025-10-04T16:15:58.227
Link: CVE-2023-53614

No data.

No data.