CVE-2024-41055: mm: prevent derefencing NULL ptr in pfn_section_valid()
First published: Mon Jul 29 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=5.10.219<5.10.222 | |
| Linux Linux kernel | >=5.15.149<5.15.163 | |
| Linux Linux kernel | >=6.1.76<6.1.100 | |
| Linux Linux kernel | >=6.6.15<6.6.41 | |
| Linux Linux kernel | >=6.8<6.9.10 | |
| redhat/kernel | <5.10.222 | 5.10.222 |
| redhat/kernel | <5.15.163 | 5.15.163 |
| redhat/kernel | <6.1.100 | 6.1.100 |
| redhat/kernel | <6.6.41 | 6.6.41 |
| redhat/kernel | <6.9.10 | 6.9.10 |
| redhat/kernel | <6.10 | 6.10 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.9-1 6.11.10-1 |
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Reference Links
- 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
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-41055
- https://nvd.nist.gov/vuln/detail/CVE-2024-41055
- https://launchpad.net/bugs/cve/CVE-2024-41055
- https://security-tracker.debian.org/tracker/CVE-2024-41055
- https://ubuntu.com/security/CVE-2024-41055
- https://git.kernel.org/linus/82f0b6f041fad768c28b4ad05a683065412c226e
- https://lore.kernel.org/linux-cve-announce/2024072928-CVE-2024-41055-5764@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2301587
- https://access.redhat.com/errata/RHSA-2024:6567
- https://access.redhat.com/errata/RHSA-2024:6990
- https://access.redhat.com/errata/RHSA-2024:7001
- https://access.redhat.com/errata/RHSA-2024:6991
- https://access.redhat.com/errata/RHSA-2024:7000
- https://access.redhat.com/errata/RHSA-2024:8614
- https://access.redhat.com/errata/RHSA-2024:8613
- https://bugzilla.redhat.com/show_bug.cgi?id=2300429
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