Vulnerability-Lookup

GHSA-MM8H-H7MM-PWWR

Vulnerability from github – Published: 2024-07-29 15:30 – Updated: 2025-09-25 21:30

Details

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.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "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",
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    },
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      "type": "CVSS_V3"
    }
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}

CVE-2024-41021 (GCVE-0-2024-41021)

Vulnerability from cvelistv5 – Published: 2024-07-29 13:34 – Updated: 2026-05-11 20:24

Title

s390/mm: Fix VM_FAULT_HWPOISON handling in do_exception()

Summary

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.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 16:24 UTC

Assigner

Linux mitre root Scorecard

References

4 references

URL	Tags
https://git.kernel.org/stable/c/73a9260b7366d2906…
https://git.kernel.org/stable/c/9e13767ccefdc4f8a…
https://git.kernel.org/stable/c/a3aefb871222a9880…
https://git.kernel.org/stable/c/df39038cd89525d46…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: af19487f00f34ff8643921d7909dbb3fedc7e329 , < 73a9260b7366d2906ec011e100319359fe2277d0 (git) Affected: af19487f00f34ff8643921d7909dbb3fedc7e329 , < 9e13767ccefdc4f8aa92514b592b60f6b54882ff (git) Affected: af19487f00f34ff8643921d7909dbb3fedc7e329 , < a3aefb871222a9880602d1a44a558177b4143e3b (git) Affected: af19487f00f34ff8643921d7909dbb3fedc7e329 , < df39038cd89525d465c2c8827eb64116873f141a (git)
Linux	Linux	Affected: 6.6 Unaffected: 0 , < 6.6 (semver) Unaffected: 6.6.44 , ≤ 6.6.* (semver) Unaffected: 6.9.12 , ≤ 6.9.* (semver) Unaffected: 6.10.2 , ≤ 6.10.* (semver) Unaffected: 6.11 , ≤ * (original_commit_for_fix)

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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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GHSA-MM8H-H7MM-PWWR

CVE-2024-41021 (GCVE-0-2024-41021)

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