CVE WatchOct 2, 2026

CVE-2026-71973

U-Boot before 2026.10-rc4 contains an integer overflow vulnerability in sqfs_read_directory_table() function when allocating the directory t

CVSS

5.2

Medium

EPSS

0.2%

KEV

—

Exploit Today

0-100

Published: Sep 29, 2026 · Last modified: Oct 2, 2026 · CWE-190

EPSS · 30d

0.2%EPSS · 30 days0.2%

2026-09-302026-10-19

Technical description

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.

Official references

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