{
  "cveId": "CVE-2022-49554",
  "url": "https://patchblox.com/security/cve/CVE-2022-49554",
  "summary": "CVE-2022-49554 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49554, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  zsmalloc: fix races between asynchronous zspage...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  zsmalloc: fix races between asynchronous zspage free and page migration  The asynchronous zspage free worker tries to lock a zspage\u0027s entire page list without defending against page migration.  Since pages which haven\u0027t yet been locked can concurrently migrate off the zspage page list while lock_zspage() churns away, lock_zspage() can suffer from a few different lethal races.  It can lock a page which no longer belongs to the zspage and unsafely dereference page_private(), it can unsafely dereference a torn pointer to the next page (since there\u0027s a data race), and it can observe a spurious NULL pointer to the next page and thus not lock all of the zspage\u0027s pages (since a single page migration will reconstruct the entire page list, and create_page_chain() unconditionally zeroes out each list pointer in the process).  Fix the races by using migrate_read_lock() in lock_zspage() to synchronize with page migration.",
  "published": "2025-02-26T07:01:31Z",
  "severity": "medium",
  "cvss": 4.7,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00217,
  "epssPercentile": 0.12199,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.18.2-1",
      "fix": "DEBIAN-CVE-2022-49554",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49554",
      "released": "2025-02-26T07:01:31Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.18.2-1",
      "fix": "DEBIAN-CVE-2022-49554",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49554",
      "released": "2025-02-26T07:01:31Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.18.2-1",
      "fix": "DEBIAN-CVE-2022-49554",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49554",
      "released": "2025-02-26T07:01:31Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}