Vulnerability-Lookup

GHSA-FMQM-F3M4-FG43

Vulnerability from github – Published: 2024-05-22 09:31 – Updated: 2024-10-31 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

drm: mxsfb: Fix NULL pointer dereference crash on unload

The mxsfb->crtc.funcs may already be NULL when unloading the driver, in which case calling mxsfb_irq_disable() via drm_irq_uninstall() from mxsfb_unload() leads to NULL pointer dereference.

Since all we care about is masking the IRQ and mxsfb->base is still valid, just use that to clear and mask the IRQ.

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-2021-47471"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-22T07:15:11Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: mxsfb: Fix NULL pointer dereference crash on unload\n\nThe mxsfb-\u003ecrtc.funcs may already be NULL when unloading the driver,\nin which case calling mxsfb_irq_disable() via drm_irq_uninstall() from\nmxsfb_unload() leads to NULL pointer dereference.\n\nSince all we care about is masking the IRQ and mxsfb-\u003ebase is still\nvalid, just use that to clear and mask the IRQ.",
  "id": "GHSA-fmqm-f3m4-fg43",
  "modified": "2024-10-31T18:31:16Z",
  "published": "2024-05-22T09:31:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47471"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3cfc183052c3dbf8eae57b6c1685dab00ed3db4a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0e6db0656ddfd8bb57303c2ef61ee1c1cc694a8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f40c2281d2c0674d32ba732fee45222d76495472"
    }
  ],
  "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"
    }
  ]
}

CVE-2021-47471 (GCVE-0-2021-47471)

Vulnerability from cvelistv5 – Published: 2024-05-22 06:23 – Updated: 2026-05-11 13:55

Title

drm: mxsfb: Fix NULL pointer dereference crash on unload

Summary

In the Linux kernel, the following vulnerability has been resolved: drm: mxsfb: Fix NULL pointer dereference crash on unload The mxsfb->crtc.funcs may already be NULL when unloading the driver, in which case calling mxsfb_irq_disable() via drm_irq_uninstall() from mxsfb_unload() leads to NULL pointer dereference. Since all we care about is masking the IRQ and mxsfb->base is still valid, just use that to clear and mask the IRQ.

Severity

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-05-29 18:40 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/f40c2281d2c0674d3…
https://git.kernel.org/stable/c/b0e6db0656ddfd8bb…
https://git.kernel.org/stable/c/3cfc183052c3dbf8e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ae1ed0093281939b80664a687689f12436c0e874 , < f40c2281d2c0674d32ba732fee45222d76495472 (git) Affected: ae1ed0093281939b80664a687689f12436c0e874 , < b0e6db0656ddfd8bb57303c2ef61ee1c1cc694a8 (git) Affected: ae1ed0093281939b80664a687689f12436c0e874 , < 3cfc183052c3dbf8eae57b6c1685dab00ed3db4a (git)
Linux	Linux	Affected: 5.10 Unaffected: 0 , < 5.10 (semver) Unaffected: 5.10.76 , ≤ 5.10.* (semver) Unaffected: 5.14.15 , ≤ 5.14.* (semver) Unaffected: 5.15 , ≤ * (original_commit_for_fix)

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              "attackVector": "LOCAL",
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              "confidentialityImpact": "NONE",
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              "scope": "UNCHANGED",
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                "timestamp": "2024-05-29T18:40:54.294735Z",
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          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-FMQM-F3M4-FG43

CVE-2021-47471 (GCVE-0-2021-47471)

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