github - ghsa-7x54-v488-56pj

ghsa-7x54-v488-56pj

Vulnerability from github

Published

2024-07-29 15:30

Modified

2024-08-22 15:31

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-41055"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-29T15:15:13Z",
    "severity": "MODERATE"
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  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: prevent derefencing NULL ptr in pfn_section_valid()\n\nCommit 5ec8e8ea8b77 (\"mm/sparsemem: fix race in accessing\nmemory_section-\u003eusage\") changed pfn_section_valid() to add a READ_ONCE()\ncall around \"ms-\u003eusage\" to fix a race with section_deactivate() where\nms-\u003eusage can be cleared.  The READ_ONCE() call, by itself, is not enough\nto prevent NULL pointer dereference.  We need to check its value before\ndereferencing it.",
  "id": "GHSA-7x54-v488-56pj",
  "modified": "2024-08-22T15:31:17Z",
  "published": "2024-07-29T15:30:43Z",
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}

cve-2024-41055

Vulnerability from cvelistv5

Published

2024-07-29 14:32

Modified

2024-11-05 09:35

Severity ?

Summary

mm: prevent derefencing NULL ptr in pfn_section_valid()

References

▼	URL	Tags
	https://git.kernel.org/stable/c/0100aeb8a12d51950418e685f879cc80cb8e5982
	https://git.kernel.org/stable/c/bc17f2377818dca643a74499c3f5333500c90503
	https://git.kernel.org/stable/c/941e816185661bf2b44b488565d09444ae316509
	https://git.kernel.org/stable/c/797323d1cf92d09b7a017cfec576d9babf99cde7
	https://git.kernel.org/stable/c/adccdf702b4ea913ded5ff512239e382d7473b63
	https://git.kernel.org/stable/c/82f0b6f041fad768c28b4ad05a683065412c226e

Impacted products

▼	Vendor	Product
	Linux	Linux
	Linux	Linux

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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