PT-2024-21613 · Linux+3 · Linux Kernel+3
Lokesh Gidra
·
Published
2024-04-04
·
Updated
2024-07-26
·
CVE-2024-27007
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue concerns the userfaultfd feature in the Linux kernel, where the src folio is changed after ensuring it's unpinned in UFFDIO MOVE. A commit was made to fix an unexpected change to src folio when UFFDIO MOVE fails, which 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.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Buffer Overflow
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linuxmint
Linux Kernel
Ubuntu