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TI-2026-50267 Aliases CVE-2026-71973GHSA-7rqg-q392-46rw

U-Boot before 2026.10-rc4 Integer Overflow in SquashFS Directory Table Allocation

Priority LOW 23CWE-190Published · Updated

Key facts

Attack vector
Physical
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · Low · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00185 8th percentileScored 2026-11-07
Fix Fixed u-boot (u-boot): 2026.10-rc4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
u-bootu-bootbefore 2026.10-rc42026.10-rc4Patch availableCNA
  • u-boot Vendoru-boot Affected before 2026.10-rc4 Fixed in 2026.10-rc4 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:denx:u-boot:*:*:*:*:*:*:*:*——u-boot
  • cpe:2.3:a:denx:u-boot:*:*:*:*:*:*:*:* Versions — — ·u-boot

Remediation

  • Fix · CNA u-boot (u-boot) Fixed in 2026.10-rc4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-71973
  2. 2026-10-03 Alias added: GHSA-7rqg-q392-46rw

References

Patch 1

Other 2

  • TI-2022-02168 Unchecked Download size in Uboot CVSS 3.1HIGH 7.7
  • TI-2025-28794 A lack of signature verification in the bootloader of DENX Software Engineering Das… CVSS 3.1MEDIUM 6.5
  • TI-2020-06770 In Das U-Boot through 2020.01, a double free has been found in the cmd/gpt.c… CVSS 3.1CRITICAL 9.8
  • TI-2022-12898 nfs_lookup_reply in net/nfs.c in Das U-Boot through 2022.04 (and through 2022.07-rc2) has… CVSS 3.1CRITICAL 9.8
  • TI-2019-10569 An issue was discovered in Das U-Boot through 2019.07. CVSS 3.0CRITICAL 9.8
  • TI-2019-10568 An issue was discovered in Das U-Boot through 2019.07. CVSS 3.0CRITICAL 9.8
See all 56 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences