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Vulnerability · Published Aug 26, 2026 · Assigned by mitre

CVE-2025-70293

Critical 9.8

In plain English

A critical-severity integer overflow in the u-boot package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.8%top 44.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12u-bootno fix listedDEBIAN-CVE-2025-70293
Debian:13u-bootno fix listedDEBIAN-CVE-2025-70293
Debian:14u-bootno fix listedDEBIAN-CVE-2025-70293
Ubuntu:22.04:LTSu-boot2022.01+dfsg-2ubuntu2.8USN-8884-1
Ubuntu:22.04:LTSu-boot2022.01+dfsg-2ubuntu2.8UBUNTU-CVE-2025-70293
Ubuntu:24.04:LTSu-boot2025.10-0ubuntu0.24.04.3UBUNTU-CVE-2025-70293
Ubuntu:24.04:LTSu-boot2025.10-0ubuntu0.24.04.3USN-8884-1
Ubuntu:26.04:LTSu-boot2025.10-0ubuntu2.1USN-8884-1
Ubuntu:26.04:LTSu-boot2025.10-0ubuntu2.1UBUNTU-CVE-2025-70293
Ubuntu:26.10u-boot2025.10-0ubuntu5UBUNTU-CVE-2025-70293
Ubuntu:22.04:LTSu-boot-nezhano fix listedUBUNTU-CVE-2025-70293
Ubuntu:24.04:LTSu-boot-nezhano fix listedUBUNTU-CVE-2025-70293

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-190, CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References