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CVE-2026-71973 affecting package qemu 10.1.0-1

Type: advisorySources: OSV

U-Boot before 2026.10-rc4 contains an integer overflow vulnerability in sqfs_read_directory_table() function when allocating the directory table buffer. Attackers can supply a crafted SquashFS image with an attacker-controlled superblock metablks_count value that causes heap buffer under-allocation and out-of-bounds writes, corrupting heap memory and crashing the bootloader.

Products
qemu
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-71973
Confirmed fixed CVEs
Not specified
Updated in this feed
30 Oct 2026, 14:04 UTC · Revision 1

Source evidence

CVE-2026-71973 affecting package qemu 10.1.0-1

core-osv · Original source

Published 29 Sept 2026, 22:18 UTC

U-Boot before 2026.10-rc4 contains an integer overflow vulnerability in sqfs_read_directory_table() function when allocating the directory table buffer. Attackers can supply a crafted SquashFS image with an attacker-controlled superblock metablks_count value that causes heap buffer under-allocation and out-of-bounds writes, corrupting heap memory and crashing the bootloader.

osv:AZL-105723

qemu

Fixed versions: Not specified

Complete source record
{
  "id": "48d5479958bd0e079a54dfbd8731f69c44aba65f26e7aa80137710cd8ef478ce",
  "url": "https://osv.dev/vulnerability/AZL-105723",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-71973 affecting package qemu 10.1.0-1",
    "summary": "U-Boot before 2026.10-rc4 contains an integer overflow vulnerability in sqfs_read_directory_table() function when allocating the directory table buffer. Attackers can supply a crafted SquashFS image with an attacker-controlled superblock metablks_count value that causes heap buffer under-allocation and out-of-bounds writes, corrupting heap memory and crashing the bootloader.",
    "evidence": "osv:AZL-105723",
    "products": [
      {
        "name": {
          "value": "qemu",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "AZL-105723",
      "aliases": [
        "AZL-105723"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "10.1.0-1"
                }
              ]
            }
          ],
          "package": {
            "name": "qemu",
            "purl": "pkg:rpm/azure-linux/qemu",
            "ecosystem": "Azure Linux:3"
          },
          "database_specific": {
            "source": "https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-105723.json"
          }
        }
      ],
      "modified": "2026-10-15T05:37:09Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-71973"
      ],
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2026-71973"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-71973",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 321364,
  "published_at": "2026-09-29T22:18:22+00:00"
}