ghsa-mm8h-h7mm-pwwr
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
s390/mm: Fix VM_FAULT_HWPOISON handling in do_exception()
There is no support for HWPOISON, MEMORY_FAILURE, or ARCH_HAS_COPY_MC on s390. Therefore we do not expect to see VM_FAULT_HWPOISON in do_exception().
However, since commit af19487f00f3 ("mm: make PTE_MARKER_SWAPIN_ERROR more general"), it is possible to see VM_FAULT_HWPOISON in combination with PTE_MARKER_POISONED, even on architectures that do not support HWPOISON otherwise. In this case, we will end up on the BUG() in do_exception().
Fix this by treating VM_FAULT_HWPOISON the same as VM_FAULT_SIGBUS, similar to x86 when MEMORY_FAILURE is not configured. Also print unexpected fault flags, for easier debugging.
Note that VM_FAULT_HWPOISON_LARGE is not expected, because s390 cannot support swap entries on other levels than PTE level.
{
"affected": [],
"aliases": [
"CVE-2024-41021"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-07-29T14:15:03Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/mm: Fix VM_FAULT_HWPOISON handling in do_exception()\n\nThere is no support for HWPOISON, MEMORY_FAILURE, or ARCH_HAS_COPY_MC on\ns390. Therefore we do not expect to see VM_FAULT_HWPOISON in\ndo_exception().\n\nHowever, since commit af19487f00f3 (\"mm: make PTE_MARKER_SWAPIN_ERROR more\ngeneral\"), it is possible to see VM_FAULT_HWPOISON in combination with\nPTE_MARKER_POISONED, even on architectures that do not support HWPOISON\notherwise. In this case, we will end up on the BUG() in do_exception().\n\nFix this by treating VM_FAULT_HWPOISON the same as VM_FAULT_SIGBUS, similar\nto x86 when MEMORY_FAILURE is not configured. Also print unexpected fault\nflags, for easier debugging.\n\nNote that VM_FAULT_HWPOISON_LARGE is not expected, because s390 cannot\nsupport swap entries on other levels than PTE level.",
"id": "GHSA-mm8h-h7mm-pwwr",
"modified": "2025-09-25T21:30:19Z",
"published": "2024-07-29T15:30:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-41021"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/73a9260b7366d2906ec011e100319359fe2277d0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9e13767ccefdc4f8aa92514b592b60f6b54882ff"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a3aefb871222a9880602d1a44a558177b4143e3b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/df39038cd89525d465c2c8827eb64116873f141a"
}
],
"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"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- 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.