GHSA-66MV-WQ2C-77C3高危未审查

无摘要

OSV 1.4.0 · unreviewed · 修改于 2026-08-31 17:30

发布时间

2026-08-28 17:31

GitHub 审查时间

—

NVD 发布时间

2026-08-28 16:16

源文件

advisories/unreviewed/2026/08/GHSA-66mv-wq2c-77c3/GHSA-66mv-wq2c-77c3.json

公告说明

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

ptp: vmclock: prevent read-only mappings from becoming writable

vmclock_miscdev_mmap() rejects writable mappings of the shared vmclock ABI page with -EROFS, but leaves VM_MAYWRITE set. Userspace can map the page read-only and then upgrade it to writable with mprotect(), after which the guest can corrupt the host-written timekeeping data (sequence counter, UTC time, TSC offset) that the vmclock ABI defines as read-only.

Clear VM_MAYWRITE on the read-only path so the mapping cannot be upgraded, as i915 does for its read-only objects and as fixed in drm/vc4 (CVE-2026-68445) and drm/panthor (CVE-2024-53071).

受影响的软件包

该公告没有提供结构化的受影响软件包信息。

参考链接

ADVISORY

标识信息

别名 / CVE

CVE-2026-80724

CWE

无

软件生态

无

扩展资料

暂无扩展资料。

CVSS 评分

CVSS_V3

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

原始 OSV JSON

{
  "id": "GHSA-66mv-wq2c-77c3",
  "aliases": [
    "CVE-2026-80724"
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nptp: vmclock: prevent read-only mappings from becoming writable\n\nvmclock_miscdev_mmap() rejects writable mappings of the shared vmclock\nABI page with -EROFS, but leaves VM_MAYWRITE set.  Userspace can map the\npage read-only and then upgrade it to writable with mprotect(), after\nwhich the guest can corrupt the host-written timekeeping data (sequence\ncounter, UTC time, TSC offset) that the vmclock ABI defines as read-only.\n\nClear VM_MAYWRITE on the read-only path so the mapping cannot be\nupgraded, as i915 does for its read-only objects and as fixed in drm/vc4\n(CVE-2026-68445) and drm/panthor (CVE-2024-53071).",
  "affected": [],
  "modified": "2026-08-31T09:30:26Z",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
    }
  ],
  "published": "2026-08-28T09:31:50Z",
  "references": [
    {
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80724",
      "type": "ADVISORY"
    },
    {
      "url": "https://git.kernel.org/stable/c/2496e141827102d6af512950057d402a2cfb2bfc",
      "type": "WEB"
    },
    {
      "url": "https://git.kernel.org/stable/c/2e596e7814ba38cdc129991058b6c254ed37cb11",
      "type": "WEB"
    },
    {
      "url": "https://git.kernel.org/stable/c/5b4f2bec7bea6c04084d720d731bedee7caf878d",
      "type": "WEB"
    },
    {
      "url": "https://git.kernel.org/stable/c/a5edadbae57e2298a56cf7a4e774a027905a331f",
      "type": "WEB"
    }
  ],
  "schema_version": "1.4.0",
  "database_specific": {
    "cwe_ids": [],
    "severity": "HIGH",
    "github_reviewed": false,
    "nvd_published_at": "2026-08-28T08:16:58Z",
    "github_reviewed_at": null
  }
}