{
  "cveId": "CVE-2026-48104",
  "url": "https://patchblox.com/security/cve/CVE-2026-48104",
  "summary": "CVE-2026-48104 is fixed in 2 products on 1 platform, first by SUSE-SU-2026:22347-1, released June 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "7zip: 7-Zip is a file archiver with a high compression ratio",
  "description": "7-Zip is a file archiver with a high compression ratio. Versions 9.18 through 26.00 contain an uninitialized heap read in the SquashFS archive handler caused by a sparsely populated index array. In the SquashFS handler, _blockToNode is allocated with capacity for every metadata block but populated only when an inode crosses a block boundary, so a crafted image with few inodes spanning many blocks leaves most slots holding raw heap contents (the underlying allocator does not zero-initialize POD storage). When OpenDir looks up an attacker-influenced blockIndex (derived from the RootInode superblock field), it reads two of these uninitialized slots and passes them as the left/right bounds of a binary search over _nodesPos, which dereferences the midpoint without bounds checking; if the resulting value happens to match the search key, the returned index is used to read a full node struct from _nodes whose fields feed further directory parsing, forming a chained OOB read primitive that is heap-layout-dependent and not reliably triggerable. The SquashFS handler is enabled by default in stock 7z.dll and the issue triggers during Open() with no interaction beyond opening the file; impact is denial of service from wild-pointer dereference and potential heap information disclosure, with no write primitive. Version 26.01 fixes the issue.",
  "published": "2026-06-05T17:16:48Z",
  "severity": "medium",
  "cvss": 4.2,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L",
  "epss": 0.00179,
  "epssPercentile": 0.07528,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "7zip",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "22.01\u002Breally26.01\u002Bdfsg-0\u002Bdeb12u1",
      "fix": "DEBIAN-CVE-2026-48104",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48104",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "7zip",
      "release": "Debian 14",
      "fixedVersion": "26.01\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2026-48104",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48104",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "7zip",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "26.01-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21038-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21038-1",
      "released": "2026-06-23T12:46:58Z"
    },
    {
      "platform": "linux",
      "product": "7zip",
      "release": "sles 15.6",
      "fixedVersion": "26.01-150400.9.6.1",
      "fix": "SUSE-SU-2026:2696-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2696-1",
      "released": "2026-06-30T09:10:04Z"
    },
    {
      "platform": "linux",
      "product": "7zip",
      "release": "sles 15.7",
      "fixedVersion": "26.01-150400.9.6.1",
      "fix": "SUSE-SU-2026:2696-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2696-1",
      "released": "2026-06-30T09:10:04Z"
    },
    {
      "platform": "linux",
      "product": "7zip",
      "release": "sles 16.0",
      "fixedVersion": "26.01-160000.1.1",
      "fix": "SUSE-SU-2026:22347-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22347-1",
      "released": "2026-06-23T12:43:00Z"
    },
    {
      "platform": "linux",
      "product": "p7zip",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "16.02\u002Breally26.01\u002Bdfsg-0\u002Bdeb12u1",
      "fix": "DEBIAN-CVE-2026-48104",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48104",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "p7zip",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "16.02\u002Btransitional.1",
      "fix": "DEBIAN-CVE-2026-48104",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48104",
      "released": "2026-06-24T14:07:24Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}