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Advisories

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

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severity
medium
date
Affecting

  • u-boot >= 0, < 2026.10-rc4

CWE
  • CWE-190 Integer Overflow or Wraparound
CVSS
5.2
CVSS V4 Vector
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
Credit
Shahriyar Jalayeri (ByteRay Ltd.), Mehrun P. Hunter (ByteRay Ltd.)
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.

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