{
  "cveId": "CVE-2026-53130",
  "url": "https://patchblox.com/security/cve/CVE-2026-53130",
  "summary": "CVE-2026-53130 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-53130, released June 25, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  fs/omfs: reject s_sys_blocksize smaller than OMF...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  fs/omfs: reject s_sys_blocksize smaller than OMFS_DIR_START  omfs_fill_super() rejects oversized s_sys_blocksize values (\u003E PAGE_SIZE), but it does not reject values smaller than OMFS_DIR_START (0x1b8 = 440).  Later, omfs_make_empty() uses      sbi-\u003Es_sys_blocksize - OMFS_DIR_START  as the length argument to memset().  Since s_sys_blocksize is u32, a crafted filesystem image with s_sys_blocksize \u003C OMFS_DIR_START causes an unsigned underflow there, wrapping to a value near 2^32.  That drives a ~4 GiB memset() from bh-\u003Eb_data \u002B OMFS_DIR_START and overwrites kernel memory far beyond the backing block buffer.  Add the corresponding lower-bound check alongside the existing upper-bound check in omfs_fill_super(), so that malformed images are rejected during superblock validation before any filesystem data is processed.",
  "published": "2026-06-24T17:17:28Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "epss": 0.00186,
  "epssPercentile": 0.08284,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.176-1",
      "fix": "DEBIAN-CVE-2026-53130",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-53130",
      "released": "2026-06-25T17:23:13Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.94-1",
      "fix": "DEBIAN-CVE-2026-53130",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-53130",
      "released": "2026-06-25T17:23:13Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.0.10-1",
      "fix": "DEBIAN-CVE-2026-53130",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-53130",
      "released": "2026-06-25T17:23:13Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}