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Vulnerability record · CVE-2025-70293 · published 26 August 2026

CVE-2025-70293: Heap-based buffer overflow vulnerability

An issue was discovered in Denx U-Boot before 2026.04. An integer overflow vulnerability exists in function ext4fs_get_bgdtable, the size calculation can lead to under allocation and this underallocated buffer will be used in memcpy() which could lead to arbitrary code execution, a denial of service, or other unspecified impacts.

9.8 CVSS 3.1 Critical EPSS 0.82% · top 44.6% CWE-122 · Heap-based buffer overflowCWE-190 · Integer overflow Deferred
9.8CVSS 3.1 base score
0.82%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
9 Sep 2026Last modified by NVD

Description

An issue was discovered in Denx U-Boot before 2026.04. An integer overflow vulnerability exists in function ext4fs_get_bgdtable, the size calculation can lead to under allocation and this underallocated buffer will be used in memcpy() which could lead to arbitrary code execution, a denial of service, or other unspecified impacts.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
http://denx.com
http://u-boot.com
https://gist.github.com/c0zy1/4d9648d10a5ff07bda2771ea1298e469

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Source: NIST National Vulnerability Database (record CVE-2025-70293), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.