Vulnerability-Lookup

CNVD-2024-46431

Vulnerability from cnvd - Published: 2024-11-28

Title

Linux kernel存在未明漏洞（CNVD-2024-46431）

Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于存在IO映射标志问题。目前没有详细的漏洞细节提供。

Severity

中

Patch Name

Linux kernel存在未明漏洞（CNVD-2024-46431）的补丁

Patch Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于存在IO映射标志问题。目前没有详细的漏洞细节提供。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://git.kernel.org/stable/c/2604afd65043e8f9d4be036cb1242adf6b5723cf

Reference

https://nvd.nist.gov/vuln/detail/CVE-2024-53071

Impacted products

Name
Linux Kernel

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    "cve": {
      "cveNumber": "CVE-2024-53071",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2024-53071"
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2024-46431",
  "openTime": "2024-11-28",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5b58\u5728IO\u6620\u5c04\u6807\u5fd7\u95ee\u9898\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
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  "products": {
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  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2024-53071",
  "serverity": "\u4e2d",
  "submitTime": "2024-11-21",
  "title": "Linux kernel\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2024-46431\uff09"
}

CVE-2024-53071 (GCVE-0-2024-53071)

Vulnerability from cvelistv5 – Published: 2024-11-19 17:22 – Updated: 2026-05-11 20:50

Title

drm/panthor: Be stricter about IO mapping flags

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/panthor: Be stricter about IO mapping flags The current panthor_device_mmap_io() implementation has two issues: 1. For mapping DRM_PANTHOR_USER_FLUSH_ID_MMIO_OFFSET, panthor_device_mmap_io() bails if VM_WRITE is set, but does not clear VM_MAYWRITE. That means userspace can use mprotect() to make the mapping writable later on. This is a classic Linux driver gotcha. I don't think this actually has any impact in practice: When the GPU is powered, writes to the FLUSH_ID seem to be ignored; and when the GPU is not powered, the dummy_latest_flush page provided by the driver is deliberately designed to not do any flushes, so the only thing writing to the dummy_latest_flush could achieve would be to make *more* flushes happen. 2. panthor_device_mmap_io() does not block MAP_PRIVATE mappings (which are mappings without the VM_SHARED flag). MAP_PRIVATE in combination with VM_MAYWRITE indicates that the VMA has copy-on-write semantics, which for VM_PFNMAP are semi-supported but fairly cursed. In particular, in such a mapping, the driver can only install PTEs during mmap() by calling remap_pfn_range() (because remap_pfn_range() wants to **store the physical address of the mapped physical memory into the vm_pgoff of the VMA**); installing PTEs later on with a fault handler (as panthor does) is not supported in private mappings, and so if you try to fault in such a mapping, vmf_insert_pfn_prot() splats when it hits a BUG() check. Fix it by clearing the VM_MAYWRITE flag (userspace writing to the FLUSH_ID doesn't make sense) and requiring VM_SHARED (copy-on-write semantics for the FLUSH_ID don't make sense). Reproducers for both scenarios are in the notes of my patch on the mailing list; I tested that these bugs exist on a Rock 5B machine. Note that I only compile-tested the patch, I haven't tested it; I don't have a working kernel build setup for the test machine yet. Please test it before applying it.

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 2025-10-01 20:12 UTC

CWE

CWE-noinfo Not enough information

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/2604afd65043e8f9d…
https://git.kernel.org/stable/c/f432a1621f049bb20…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5fe909cae118a757a77afb37174b99436a36d2e2 , < 2604afd65043e8f9d4be036cb1242adf6b5723cf (git) Affected: 5fe909cae118a757a77afb37174b99436a36d2e2 , < f432a1621f049bb207e78363d9d0e3c6fa2da5db (git)
Linux	Linux	Affected: 6.10 Unaffected: 0 , < 6.10 (semver) Unaffected: 6.11.8 , ≤ 6.11.* (semver) Unaffected: 6.12 , ≤ * (original_commit_for_fix)

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        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
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                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T20:12:23.550632Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
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            "descriptions": [
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                "description": "CWE-noinfo Not enough information",
                "lang": "en",
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        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T20:17:16.169Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
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            {
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              "version": "6.11.8",
              "versionType": "semver"
            },
            {
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              "version": "6.12",
              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/panthor: Be stricter about IO mapping flags\n\nThe current panthor_device_mmap_io() implementation has two issues:\n\n1. For mapping DRM_PANTHOR_USER_FLUSH_ID_MMIO_OFFSET,\n   panthor_device_mmap_io() bails if VM_WRITE is set, but does not clear\n   VM_MAYWRITE. That means userspace can use mprotect() to make the mapping\n   writable later on. This is a classic Linux driver gotcha.\n   I don\u0027t think this actually has any impact in practice:\n   When the GPU is powered, writes to the FLUSH_ID seem to be ignored; and\n   when the GPU is not powered, the dummy_latest_flush page provided by the\n   driver is deliberately designed to not do any flushes, so the only thing\n   writing to the dummy_latest_flush could achieve would be to make *more*\n   flushes happen.\n\n2. panthor_device_mmap_io() does not block MAP_PRIVATE mappings (which are\n   mappings without the VM_SHARED flag).\n   MAP_PRIVATE in combination with VM_MAYWRITE indicates that the VMA has\n   copy-on-write semantics, which for VM_PFNMAP are semi-supported but\n   fairly cursed.\n   In particular, in such a mapping, the driver can only install PTEs\n   during mmap() by calling remap_pfn_range() (because remap_pfn_range()\n   wants to **store the physical address of the mapped physical memory into\n   the vm_pgoff of the VMA**); installing PTEs later on with a fault\n   handler (as panthor does) is not supported in private mappings, and so\n   if you try to fault in such a mapping, vmf_insert_pfn_prot() splats when\n   it hits a BUG() check.\n\nFix it by clearing the VM_MAYWRITE flag (userspace writing to the FLUSH_ID\ndoesn\u0027t make sense) and requiring VM_SHARED (copy-on-write semantics for\nthe FLUSH_ID don\u0027t make sense).\n\nReproducers for both scenarios are in the notes of my patch on the mailing\nlist; I tested that these bugs exist on a Rock 5B machine.\n\nNote that I only compile-tested the patch, I haven\u0027t tested it; I don\u0027t\nhave a working kernel build setup for the test machine yet. Please test it\nbefore applying it."
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        {
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    "datePublished": "2024-11-19T17:22:38.327Z",
    "dateReserved": "2024-11-19T17:17:24.976Z",
    "dateUpdated": "2026-05-11T20:50:17.522Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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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CNVD-2024-46431

CVE-2024-53071 (GCVE-0-2024-53071)

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