USN-8930-2: U-Boot vulnerabilities
Publication date
21 October 2026
Overview
Several security issues were fixed in U-Boot.
Releases
Packages
- u-boot - A boot loader for embedded systems
Details
USN-8930-1 fixed some vulnerabilities in U-Boot. This update provides the
corresponding fix for U-Boot on Ubuntu 26.10.
Original advisory 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. (CVE-2026-74222)
Shahriyar Jalayeri and Mehrun P. Hunter discovered that U-Boot did not
properly validate certain...
USN-8930-1 fixed some vulnerabilities in U-Boot. This update provides the
corresponding fix for U-Boot on Ubuntu 26.10.
Original advisory 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. (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. (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 | ||
|---|---|---|---|
| 26.10 stonking | u-boot-imx – 2025.10-0ubuntu6 | ||
| u-boot-qemu – 2025.10-0ubuntu6 | |||
| u-boot-tools – 2025.10-0ubuntu6 | |||
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