CVEvulnerability
CVE-2026-71973
5.2 MEDIUM
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-09-29
- Last modified
- 2026-10-02
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 5.2 MEDIUM — 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 5.2 MEDIUM — CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- Weaknesses
- CWE-190
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.
Related
Weakness · CWE (1)
- CWE-190 Integer Overflow or Wraparound weakness
References
- https://github.com/u-boot/u-boot github.com
- https://github.com/u-boot/u-boot/blob/v2026.07/fs/squashfs/sqfs.c#L814 github.com
- https://github.com/u-boot/u-boot/commit/561ae28cb56a082cfa90c1c421c4955bc215470b github.com
- https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc4-integer-overflow-in-squashfs-directory-table-allocation www.vulncheck.com