CVE-2024-41055

mm: prevent derefencing NULL ptr in pfn_section_valid()

State: Published
Severity: Not scored
Published: Jul 29, 2024
Updated: May 23, 2026
Reserved: Jul 12, 2024

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	90ad17575d26874287271127d43ef3c2af876cea to before 0100aeb8a12d51950418e685f879cc80cb8e5982Affected b448de2459b6d62a53892487ab18b7d823ff0529 to before bc17f2377818dca643a74499c3f5333500c90503Affected 68ed9e33324021e9d6b798e9db00ca3093d2012a to before 941e816185661bf2b44b488565d09444ae316509Affected 70064241f2229f7ba7b9599a98f68d9142e81a97 to before 797323d1cf92d09b7a017cfec576d9babf99cde7Affected 5ec8e8ea8b7783fab150cf86404fc38cb4db8800 to before adccdf702b4ea913ded5ff512239e382d7473b63Affected 5ec8e8ea8b7783fab150cf86404fc38cb4db8800 to before 82f0b6f041fad768c28b4ad05a683065412c226eAffected 3a01daace71b521563c38bbbf874e14c3e58adb7Affected 5.10.210 to before 5.10.222Affected 5.15.149 to before 5.15.163Affected 6.1.76 to before 6.1.100Affected 6.6.15 to before 6.6.41Affected 6.7.3 to before 6.8Affected
LinuxLinux	6.8Affected before 6.8Not affected 5.10.222 through 5.10.Not affected 5.15.163 through 5.15.Not affected 6.1.100 through 6.1.Not affected 6.6.41 through 6.6.Not affected 6.9.10 through 6.9.*Not affected 6.10 and laterNot affected

Product

Versions

LinuxLinux

90ad17575d26874287271127d43ef3c2af876cea to before 0100aeb8a12d51950418e685f879cc80cb8e5982Affected
b448de2459b6d62a53892487ab18b7d823ff0529 to before bc17f2377818dca643a74499c3f5333500c90503Affected
68ed9e33324021e9d6b798e9db00ca3093d2012a to before 941e816185661bf2b44b488565d09444ae316509Affected
70064241f2229f7ba7b9599a98f68d9142e81a97 to before 797323d1cf92d09b7a017cfec576d9babf99cde7Affected
5ec8e8ea8b7783fab150cf86404fc38cb4db8800 to before adccdf702b4ea913ded5ff512239e382d7473b63Affected
5ec8e8ea8b7783fab150cf86404fc38cb4db8800 to before 82f0b6f041fad768c28b4ad05a683065412c226eAffected
3a01daace71b521563c38bbbf874e14c3e58adb7Affected
5.10.210 to before 5.10.222Affected
5.15.149 to before 5.15.163Affected
6.1.76 to before 6.1.100Affected
6.6.15 to before 6.6.41Affected
6.7.3 to before 6.8Affected

LinuxLinux

6.8Affected
before 6.8Not affected
5.10.222 through 5.10.*Not affected
5.15.163 through 5.15.*Not affected
6.1.100 through 6.1.*Not affected
6.6.41 through 6.6.*Not affected
6.9.10 through 6.9.*Not affected
6.10 and laterNot affected

References

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