GHSA-7X54-V488-56PJ
Vulnerability from github – Published: 2024-07-29 15:30 – Updated: 2025-11-04 00:31In 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.
{
"affected": [],
"aliases": [
"CVE-2024-41055"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-07-29T15:15:13Z",
"severity": "MODERATE"
},
"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": "2025-11-04T00:31:00Z",
"published": "2024-07-29T15:30:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-41055"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0100aeb8a12d51950418e685f879cc80cb8e5982"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/797323d1cf92d09b7a017cfec576d9babf99cde7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/82f0b6f041fad768c28b4ad05a683065412c226e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/941e816185661bf2b44b488565d09444ae316509"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/adccdf702b4ea913ded5ff512239e382d7473b63"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bc17f2377818dca643a74499c3f5333500c90503"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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