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Medium

DEBIAN-CVE-2026-71973

Type: advisorySource: OSV1 source record

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.

Announced Group revision 1
Original source ↗

DEBIAN-CVE-2026-71973

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-71973

u-boot

Source reference: /affected/0/package/name

Affected versions
2023.01+dfsg-2

Source reference: /affected/0/versions

2023.01+dfsg-2+deb12u1

Source reference: /affected/0/versions

2023.01+dfsg-2+deb12u2

Source reference: /affected/0/versions

2023.01+dfsg-2+deb12u3

Source reference: /affected/0/versions

2023.04+dfsg-1

Source reference: /affected/0/versions

2023.04~rc2+dfsg-1

Source reference: /affected/0/versions

2023.04~rc5+dfsg-1

Source reference: /affected/0/versions

2023.07+dfsg-1

Source reference: /affected/0/versions

2023.07~rc4+dfsg-1

Source reference: /affected/0/versions

2023.07~rc5+dfsg-1

Source reference: /affected/0/versions

2024.01+dfsg-1

Source reference: /affected/0/versions

2024.01+dfsg-2

Source reference: /affected/0/versions

2024.01+dfsg-3

Source reference: /affected/0/versions

2024.01+dfsg-4

Source reference: /affected/0/versions

2024.01+dfsg-5

Source reference: /affected/0/versions

2024.01+dfsg-6

Source reference: /affected/0/versions

2024.01+dfsg-7

Source reference: /affected/0/versions

2024.01~rc6+dfsg-1

Source reference: /affected/0/versions

2024.01~rc6+dfsg-2

Source reference: /affected/0/versions

2025.01-1

Source reference: /affected/0/versions

2025.01-2

Source reference: /affected/0/versions

2025.01-3

Source reference: /affected/0/versions

2025.01-3.1

Source reference: /affected/0/versions

2025.01-3.2

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

u-boot

Source reference: /affected/1/package/name

Affected versions
2025.01-3

Source reference: /affected/1/versions

2025.01-3+deb13u1

Source reference: /affected/1/versions

2025.01-3.1

Source reference: /affected/1/versions

2025.01-3.2

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

u-boot

Source reference: /affected/2/package/name

Affected versions
2025.01-3

Source reference: /affected/2/versions

2025.01-3.1

Source reference: /affected/2/versions

2025.01-3.2

Source reference: /affected/2/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "u-boot",
      "purl": "pkg:deb/debian/u-boot?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "2023.01+dfsg-2",
      "2023.01+dfsg-2+deb12u1",
      "2023.01+dfsg-2+deb12u2",
      "2023.01+dfsg-2+deb12u3",
      "2023.04+dfsg-1",
      "2023.04~rc2+dfsg-1",
      "2023.04~rc5+dfsg-1",
      "2023.07+dfsg-1",
      "2023.07~rc4+dfsg-1",
      "2023.07~rc5+dfsg-1",
      "2024.01+dfsg-1",
      "2024.01+dfsg-2",
      "2024.01+dfsg-3",
      "2024.01+dfsg-4",
      "2024.01+dfsg-5",
      "2024.01+dfsg-6",
      "2024.01+dfsg-7",
      "2024.01~rc6+dfsg-1",
      "2024.01~rc6+dfsg-2",
      "2025.01-1",
      "2025.01-2",
      "2025.01-3",
      "2025.01-3.1",
      "2025.01-3.2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71973.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "u-boot",
      "purl": "pkg:deb/debian/u-boot?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "2025.01-3",
      "2025.01-3+deb13u1",
      "2025.01-3.1",
      "2025.01-3.2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71973.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "u-boot",
      "purl": "pkg:deb/debian/u-boot?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "2025.01-3",
      "2025.01-3.1",
      "2025.01-3.2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-71973.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]
Related CVEs
CVE-2026-71973

Source reference: /upstream

Publisher severity

medium

Source reference: /severity/0/score

Linked CVE context

These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.

CVE-2026-71973 · Medium

u-boot

Event
#72970 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-71973 · Revision 1Source updated