NULL Pointer Dereference Affecting kernel-debug-modules package, versions <0:4.18.0-553.22.1.el8_10
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Test your applications- Snyk ID SNYK-RHEL8-KERNELDEBUGMODULES-7597938
- published 5 Aug 2024
- disclosed 29 Jul 2024
Introduced: 29 Jul 2024
CVE-2024-41055 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-debug-modules to version 0:4.18.0-553.22.1.el8_10 or higher.
This issue was patched in RHSA-2024:7000.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules package and not the kernel-debug-modules package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2024-41055
- https://git.kernel.org/stable/c/0100aeb8a12d51950418e685f879cc80cb8e5982
- https://git.kernel.org/stable/c/797323d1cf92d09b7a017cfec576d9babf99cde7
- https://git.kernel.org/stable/c/82f0b6f041fad768c28b4ad05a683065412c226e
- https://git.kernel.org/stable/c/941e816185661bf2b44b488565d09444ae316509
- https://git.kernel.org/stable/c/adccdf702b4ea913ded5ff512239e382d7473b63
- https://git.kernel.org/stable/c/bc17f2377818dca643a74499c3f5333500c90503