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[USN-8930-1] U-Boot vulnerabilities

Posted on 14 October 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8930-1
October 14, 2026

u-boot vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in U-Boot.

Software Description:
- u-boot: A boot loader for embedded systems

Details:

Shahriyar Jalayeri and Mehrun P. Hunter discovered that U-Boot
incorrectly handled certain NFS READ and NFS READLINK responses. An
attacker could possibly use this issue to trigger a buffer overflow,
resulting in a denial of service or arbitrary code execution.
(CVE-2026-74220, CVE-2026-74221)

Shahriyar Jalayeri and Mehrun P. Hunter discovered that U-Boot
incorrectly handled certain HTTP data storage failures in its lwIP
implementation. An attacker could possibly use this issue to trigger a
use-after-free, resulting in a denial of service. This issue only
affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-74222)

Shahriyar Jalayeri and Mehrun P. Hunter discovered that U-Boot did not
properly validate certain DHCPv6 option lengths during network boot. An
attacker could possibly use this issue to trigger out-of-bounds memory
access, resulting in a denial of service. This issue only affected
Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-74225)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
u-boot-imx 2025.10-0ubuntu2.2
u-boot-qemu 2025.10-0ubuntu2.2
u-boot-tools 2025.10-0ubuntu2.2

Ubuntu 24.04 LTS
u-boot-imx 2025.10-0ubuntu0.24.04.4
u-boot-qemu 2025.10-0ubuntu0.24.04.4
u-boot-tools 2025.10-0ubuntu0.24.04.4

Ubuntu 22.04 LTS
u-boot-imx 2022.01+dfsg-2ubuntu2.9
u-boot-qemu 2022.01+dfsg-2ubuntu2.9
u-boot-tools 2022.01+dfsg-2ubuntu2.9

Ubuntu 20.04 LTS
u-boot-imx 2021.01+dfsg-3ubuntu0~20.04.6+esm2
Available with Ubuntu Pro
u-boot-qemu 2021.01+dfsg-3ubuntu0~20.04.6+esm2
Available with Ubuntu Pro
u-boot-tools 2021.01+dfsg-3ubuntu0~20.04.6+esm2
Available with Ubuntu Pro

Ubuntu 18.04 LTS
u-boot-imx 2020.10+dfsg-1ubuntu0~18.04.3+esm2
Available with Ubuntu Pro
u-boot-qemu 2020.10+dfsg-1ubuntu0~18.04.3+esm2
Available with Ubuntu Pro
u-boot-tools 2020.10+dfsg-1ubuntu0~18.04.3+esm2
Available with Ubuntu Pro

Ubuntu 16.04 LTS
u-boot-imx 2016.01+dfsg1-2ubuntu5+esm2
Available with Ubuntu Pro
u-boot-tools 2016.01+dfsg1-2ubuntu5+esm2
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8930-1
CVE-2026-74220, CVE-2026-74221, CVE-2026-74222, CVE-2026-74225

Package Information:
https://launchpad.net/ubuntu/+source/u-boot/2025.10-0ubuntu2.2
https://launchpad.net/ubuntu/+source/u-boot/2025.10-0ubuntu0.24.04.4
https://launchpad.net/ubuntu/+source/u-boot/2022.01+dfsg-2ubuntu2.9

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