GHSA-7x54-v488-56pj

GHSA-7x54-v488-56pj PUBLISHED CVSS 5.5 MEDIUM

Record from GitHub Advisory Database · Published July 29, 2024

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.

Risk scores

CVSS 3.1

5.5

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Timeline

Jul 29, 2024 CVE Published
May 1, 2026 Security Advisory

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vulnetix vdb vuln GHSA-7x54-v488-56pj
vulnetix vdb fixes GHSA-7x54-v488-56pj

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