{
  "cveId": "CVE-2026-80656",
  "url": "https://patchblox.com/security/cve/CVE-2026-80656",
  "summary": "CVE-2026-80656 is fixed in linux on 1 platform by DEBIAN-CVE-2026-80656 (version 7.1.5-1), released August 29, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  hfsplus: Add a sanity check for btree node size...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  hfsplus: Add a sanity check for btree node size  Syzbot reported an uninit-value bug in [1] with a corrupted HFS\u002B image, during the file system mounting process, specifically while loading the catalog, a corrupted node_size value of 1 caused the rec_off argument passed to hfs_bnode_read_u16() (within hfs_bnode_find()) to be excessively large. Consequently, the function failed to return a valid value to initialize the off variable, triggering the bug [1].  Every node starts from BTree node descriptor: struct hfs_bnode_desc. So, the size of node cannot be lesser than that. However, technical specification declares that: \u0022The node size (which is expressed in bytes) must be power of two, from 512 through 32,768, inclusive.\u0022 Add a check for btree node size base on technical specification.  [1] BUG: KMSAN: uninit-value in hfsplus_bnode_find\u002B0x141c/0x1600 fs/hfsplus/bnode.c:584  hfsplus_bnode_find\u002B0x141c/0x1600 fs/hfsplus/bnode.c:584  hfsplus_btree_open\u002B0x169a/0x1e40 fs/hfsplus/btree.c:382  hfsplus_fill_super\u002B0x111f/0x2770 fs/hfsplus/super.c:553  get_tree_bdev_flags\u002B0x6e6/0x920 fs/super.c:1694  get_tree_bdev\u002B0x38/0x50 fs/super.c:1717  hfsplus_get_tree\u002B0x35/0x40 fs/hfsplus/super.c:709  vfs_get_tree\u002B0xb3/0x5d0 fs/super.c:1754  fc_mount fs/namespace.c:1193 [inline]",
  "published": "2026-08-28T08:16:50Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00165,
  "epssPercentile": 0.0575,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.5-1",
      "fix": "DEBIAN-CVE-2026-80656",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80656",
      "released": "2026-08-29T00:46:20Z"
    }
  ],
  "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"
  }
}