CVE-2023-53614 - mm/ksm: fix race with VMA iteration and mm_struct teardown

CVE-2023-53614 - mm/ksm: fix race with VMA iteration and mm_struct teardown

https://cvefeed.io/rssfeed/latest.atom / Sat, 10/04/2025 - 20:42
CVE ID : CVE-2023-53614
Published : Oct. 4, 2025, 4:15 p.m. | 2 hours, 26 minutes ago
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.
Severity: 0.0 | NA
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