UBUNTU-CVE-2024-27007
In the Linux kernel, the following vulnerability has been resolved: userfaultfd: change src_folio after ensuring it's unpinned in UFFDIO_MOVE Commit d7a08838ab74 ("mm: userfaultfd: fix unexpected change to src_folio when UFFDIO_MOVE fails") moved the src_folio->{mapping, index} changing to after clearing the page-table and ensuring that it's not pinned. This avoids failure of swapout+migration and possibly memory corruption. However, the commit missed fixing it in the huge-page case.
02 / AFFECTED SOFTWARE
Affected packages
50 explicit affected versions
6 explicit affected versions
12 explicit affected versions
6 explicit affected versions
6 explicit affected versions
5 explicit affected versions
7 explicit affected versions
1 explicit affected versions
2 explicit affected versions
35 explicit affected versions
18 explicit affected versions
6 explicit affected versions
13 explicit affected versions
4 explicit affected versions
23 explicit affected versions
9 explicit affected versions
21 explicit affected versions
16 explicit affected versions
10 explicit affected versions
7 explicit affected versions
7 explicit affected versions
12 explicit affected versions
12 explicit affected versions
1 explicit affected versions
7 explicit affected versions
12 explicit affected versions
12 explicit affected versions
2 explicit affected versions
37 explicit affected versions
10 explicit affected versions
26 explicit affected versions
13 explicit affected versions
29 explicit affected versions
13 explicit affected versions
33 explicit affected versions
23 explicit affected versions
10 explicit affected versions
12 explicit affected versions
7 explicit affected versions
12 explicit affected versions
10 explicit affected versions
26 explicit affected versions
8 explicit affected versions
8 explicit affected versions
13 explicit affected versions
7 explicit affected versions
16 explicit affected versions
8 explicit affected versions
3 explicit affected versions
51 explicit affected versions
5 explicit affected versions
12 explicit affected versions
27 explicit affected versions
1 explicit affected versions
8 explicit affected versions
5 explicit affected versions
2 explicit affected versions
8 explicit affected versions
10 explicit affected versions
4 explicit affected versions
13 explicit affected versions
7 explicit affected versions
10 explicit affected versions
12 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
37 explicit affected versions
8 explicit affected versions
38 explicit affected versions
9 explicit affected versions
11 explicit affected versions
7 explicit affected versions
4 explicit affected versions
43 explicit affected versions
10 explicit affected versions
8 explicit affected versions
3 explicit affected versions
14 explicit affected versions
4 explicit affected versions
1 explicit affected versions
2 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: userfaultfd: change src_folio after ensuring it's unpinned in UFFDIO_MOVE Commit d7a08838ab74 ("mm: userfaultfd: fix unexpected change to src_folio when UFFDIO_MOVE fails") moved the src_folio->{mapping, index} changing to after clearing the page-table and ensuring that it's not pinned. This avoids failure of swapout+migration and possibly memory corruption. However, the commit missed fixing it in the huge-page case.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/c0205eaf3af9f5db14d4b5ee4abacf4a583c3c50
- https://git.kernel.org/stable/c/c0205eaf3af9f5db14d4b5ee4abacf4a583c3c50
- https://git.kernel.org/stable/c/df5f6e683e7f21a15d8be6e7a0c7a46436963ebe
- https://ubuntu.com/security/CVE-2024-27007
- https://ubuntu.com/security/notices/USN-6893-1
- https://ubuntu.com/security/notices/USN-6893-2
- https://ubuntu.com/security/notices/USN-6893-3
- https://ubuntu.com/security/notices/USN-6918-1
- https://www.cve.org/CVERecord?id=CVE-2024-27007