UBUNTU-CVE-2020-29369
An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call, aka CID-246c320a8cfe.
02 / AFFECTED SOFTWARE
Affected packages
6 explicit affected versions
6 explicit affected versions
12 explicit affected versions
23 explicit affected versions
1 explicit affected versions
1 explicit affected versions
7 explicit affected versions
5 explicit affected versions
1 explicit affected versions
12 explicit affected versions
16 explicit affected versions
12 explicit affected versions
10 explicit affected versions
1 explicit affected versions
22 explicit affected versions
13 explicit affected versions
14 explicit affected versions
10 explicit affected versions
11 explicit affected versions
12 explicit affected versions
4 explicit affected versions
1 explicit affected versions
2 explicit affected versions
1 explicit affected versions
2 explicit affected versions
1 explicit affected versions
2 explicit affected versions
44 explicit affected versions
16 explicit affected versions
38 explicit affected versions
9 explicit affected versions
2 explicit affected versions
2 explicit affected versions
43 explicit affected versions
1 explicit affected versions
12 explicit affected versions
6 explicit affected versions
4 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call, aka CID-246c320a8cfe.
05 / REFERENCES
Further evidence
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2056
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.11
- https://git.kernel.org/linus/246c320a8cfe0b11d81a4af38fa9985ef0cc9a4c
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=246c320a8cfe0b11d81a4af38fa9985ef0cc9a4c
- https://ubuntu.com/security/CVE-2020-29369
- https://ubuntu.com/security/notices/USN-4752-1
- https://www.cve.org/CVERecord?id=CVE-2020-29369