vulnerability
Red Hat: CVE-2024-41055: kernel: mm: prevent derefencing NULL ptr in pfn_section_valid() (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:N/I:N/A:C) | 2024-07-29 | 2024-09-25 | 2025-03-17 |
Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
2024-07-29
Added
2024-09-25
Modified
2025-03-17
Description
In the Linux kernel, the following vulnerability has been resolved:
mm: prevent derefencing NULL ptr in pfn_section_valid()
Commit 5ec8e8ea8b77 ("mm/sparsemem: fix race in accessing
memory_section->usage") changed pfn_section_valid() to add a READ_ONCE()
call around "ms->usage" to fix a race with section_deactivate() where
ms->usage can be cleared. The READ_ONCE() call, by itself, is not enough
to prevent NULL pointer dereference. We need to check its value before
dereferencing it.
Solution(s)
redhat-upgrade-kernelredhat-upgrade-kernel-rt
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