CVE-2024-41055

MEDIUM EPSS 16.8%
Published Jul 29, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jul 29, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
16.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥5.10.219  –  <5.10.222
linuxlinux_kernel*≥5.15.149  –  <5.15.163
linuxlinux_kernel*≥6.1.76  –  <6.1.100
linuxlinux_kernel*≥6.6.15  –  <6.6.41
linuxlinux_kernel*≥6.8  –  <6.9.10

References 7

  • git.kernel.org https://git.kernel.org/stable/c/0100aeb8a12d51950418e685f879cc80cb8e5982
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/797323d1cf92d09b7a017cfec576d9babf99cde7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/82f0b6f041fad768c28b4ad05a683065412c226e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/941e816185661bf2b44b488565d09444ae316509
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/adccdf702b4ea913ded5ff512239e382d7473b63
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bc17f2377818dca643a74499c3f5333500c90503
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0100aeb8a12d51950418e685f879cc80cb8e5982
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/797323d1cf92d09b7a017cfec576d9babf99cde7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/82f0b6f041fad768c28b4ad05a683065412c226e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/941e816185661bf2b44b488565d09444ae316509
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/adccdf702b4ea913ded5ff512239e382d7473b63
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/bc17f2377818dca643a74499c3f5333500c90503
    Patch