vulnerability
Oracle Linux: CVE-2025-38686: ELSA-2025-20662: Unbreakable Enterprise kernel security update (IMPORTANT)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:L/AC:M/Au:S/C:N/I:N/A:C) | Sep 4, 2025 | Oct 16, 2025 | Oct 16, 2025 |
Severity
4
CVSS
(AV:L/AC:M/Au:S/C:N/I:N/A:C)
Published
Sep 4, 2025
Added
Oct 16, 2025
Modified
Oct 16, 2025
Description
In the Linux kernel, the following vulnerability has been resolved:
userfaultfd: fix a crash in UFFDIO_MOVE when PMD is a migration entry
When UFFDIO_MOVE encounters a migration PMD entry, it proceeds with
obtaining a folio and accessing it even though the entry is swp_entry_t.
Add the missing check and let split_huge_pmd() handle migration entries.
While at it also remove unnecessary folio check.
[[email protected]: remove extra folio check, per David]
userfaultfd: fix a crash in UFFDIO_MOVE when PMD is a migration entry
When UFFDIO_MOVE encounters a migration PMD entry, it proceeds with
obtaining a folio and accessing it even though the entry is swp_entry_t.
Add the missing check and let split_huge_pmd() handle migration entries.
While at it also remove unnecessary folio check.
[[email protected]: remove extra folio check, per David]
Solution
oracle-linux-upgrade-kernel-uek
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