CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
5.0%
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.
git.kernel.org/stable/c/0100aeb8a12d51950418e685f879cc80cb8e5982
git.kernel.org/stable/c/797323d1cf92d09b7a017cfec576d9babf99cde7
git.kernel.org/stable/c/82f0b6f041fad768c28b4ad05a683065412c226e
git.kernel.org/stable/c/941e816185661bf2b44b488565d09444ae316509
git.kernel.org/stable/c/adccdf702b4ea913ded5ff512239e382d7473b63
git.kernel.org/stable/c/bc17f2377818dca643a74499c3f5333500c90503
security-tracker.debian.org/tracker/CVE-2024-41055