Packages
- 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...
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
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 26.04 LTS resolute | u-boot-imx – 2025.10-0ubuntu2.2 | ||
| u-boot-qemu – 2025.10-0ubuntu2.2 | |||
| u-boot-tools – 2025.10-0ubuntu2.2 | |||
| 24.04 LTS noble | 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 | |||
| 22.04 LTS jammy | u-boot-imx – 2022.01+dfsg-2ubuntu2.9 | ||
| u-boot-qemu – 2022.01+dfsg-2ubuntu2.9 | |||
| u-boot-tools – 2022.01+dfsg-2ubuntu2.9 | |||
| 20.04 LTS focal | u-boot-imx – 2021.01+dfsg-3ubuntu0~20.04.6+esm2 | ||
| u-boot-qemu – 2021.01+dfsg-3ubuntu0~20.04.6+esm2 | |||
| u-boot-tools – 2021.01+dfsg-3ubuntu0~20.04.6+esm2 | |||
| 18.04 LTS bionic | u-boot-imx – 2020.10+dfsg-1ubuntu0~18.04.3+esm2 | ||
| u-boot-qemu – 2020.10+dfsg-1ubuntu0~18.04.3+esm2 | |||
| u-boot-tools – 2020.10+dfsg-1ubuntu0~18.04.3+esm2 | |||
| 16.04 LTS xenial | u-boot-imx – 2016.01+dfsg1-2ubuntu5+esm2 | ||
| u-boot-tools – 2016.01+dfsg1-2ubuntu5+esm2 | |||
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