CVE-2026-71973
5.2
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
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| u-boot | u-boot | 0 < 2026.10-rc4 | affected |
Weaknesses
- CWE-190: Integer Overflow or Wraparound
References
- https://github.com/u-boot/u-boot/commit/561ae28cb56a082cfa90c1c421c4955bc215470b
- https://github.com/u-boot/u-boot/blob/v2026.07/fs/squashfs/sqfs.c#L814
- https://github.com/u-boot/u-boot
- https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc4-integer-overflow-in-squashfs-directory-table-allocation
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