Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: userfaultfd: fix a race between writeprotect and exit_mmap() A race is possible when a process exits, its VMAs are removed by exit_mmap() and at the same time userfaultfd_writeprotect() is called. The race was detected by KASAN on a development kernel, but it appears to be possible on vanilla kernels as well. Use mmget_not_zero() to prevent the race as done in other userfaultfd operations.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 63b2d4174c4ad1f40b48d7138e71bcb564c1fe03 before 3cda4bfffd4f755645577aaa9e96a606657b4525; affected 63b2d4174c4ad1f40b48d7138e71bcb564c1fe03 before 149958ecd0627a9f1e9c678c25c665400054cd6a; affected 63b2d4174c4ad1f40b48d7138e71bcb564c1fe03 before cb185d5f1ebf900f4ae3bf84cee212e6dd035aca |
| Linux / Linux | affected 5.7; unaffected 0 before 5.7; unaffected 5.10.76 through 5.10.*; unaffected 5.14.15 through 5.14.*; unaffected 5.15 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/3cda4bfffd4f755645577aaa9e96a606657b4525
- https://git.kernel.org/stable/c/149958ecd0627a9f1e9c678c25c665400054cd6a
- https://git.kernel.org/stable/c/cb185d5f1ebf900f4ae3bf84cee212e6dd035aca
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.