CVE catalog
CVE-2026-71974
U-Boot before 2026.10-rc3 contains an out-of-bounds write vulnerability in read_slotted_partition() that fails to validate image size against partition bounds. Attackers with physical access can suppl
- Severity
- Medium · CVSS 4.8
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.18% · Oct 25, 2026
U-Boot before 2026.10-rc3 contains an out-of-bounds write vulnerability in read_slotted_partition() that fails to validate image size against partition bounds. Attackers with physical access can supply crafted boot media with oversized headers to write past the load buffer into bootloader memory on devices without Android Verified Boot protection.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | u-boot | sid | 2025.01-3.2 | not affected |
| Debian | u-boot | forky | 2025.01-3.2 | not affected |
| Debian | u-boot | trixie | 2025.01-3+deb13u1 | not affected |
| Debian | u-boot | bookworm | 2023.01+dfsg-2+deb12u3 | not affected |
| Debian | u-boot | bookworm-security | 2023.01+dfsg-2+deb12u3 | not affected |
| Ubuntu | u-boot | pro | 2019.07+dfsg-1ubuntu3 | vulnerable |
| Ubuntu | u-boot | pro | 2019.07+dfsg-1ubuntu5 | vulnerable |
| Ubuntu | u-boot | pro | 2019.07+dfsg-1ubuntu6 | vulnerable |
| Ubuntu | u-boot | pro | 2020.10+dfsg-1ubuntu0~20.04.2 | vulnerable |
| Ubuntu | u-boot | pro | 2021.01+dfsg-3ubuntu0~20.04.1 | vulnerable |
| Ubuntu | u-boot | pro | 2021.01+dfsg-3ubuntu0~20.04.3 | vulnerable |
| Ubuntu | u-boot | pro | 2021.01+dfsg-3ubuntu0~20.04.4 | vulnerable |
| Ubuntu | u-boot | pro | 2021.01+dfsg-3ubuntu0~20.04.5 | vulnerable |
| Ubuntu | u-boot | pro | 2021.01+dfsg-3ubuntu0~20.04.6 | vulnerable |
| Ubuntu | u-boot | pro | 2021.01+dfsg-3ubuntu0~20.04.6+esm1 | vulnerable |
| Ubuntu | u-boot | pro | 2021.01+dfsg-3ubuntu0~20.04.6+esm2 | vulnerable |
| Ubuntu | u-boot | 22.04 | 2021.07+dfsg-0ubuntu8 | vulnerable |
| Ubuntu | u-boot | 22.04 | 2021.07+dfsg-0ubuntu9 | vulnerable |
| Ubuntu | u-boot | 22.04 | 2021.07+dfsg-0ubuntu10 | vulnerable |
| Ubuntu | u-boot | 22.04 | 2022.01+dfsg-2ubuntu1 | vulnerable |
| Ubuntu | u-boot | 22.04 | 2022.01+dfsg-2ubuntu2 | vulnerable |
| Ubuntu | u-boot | 22.04 | 2022.01+dfsg-2ubuntu2.1 | vulnerable |
| Ubuntu | u-boot | 22.04 | 2022.01+dfsg-2ubuntu2.3 | vulnerable |
| Ubuntu | u-boot | 22.04 | 2022.01+dfsg-2ubuntu2.4 | vulnerable |
| Ubuntu | u-boot | 22.04 | 2022.01+dfsg-2ubuntu2.5 | vulnerable |
| Ubuntu | u-boot | 22.04 | 2022.01+dfsg-2ubuntu2.6 | vulnerable |
| Ubuntu | u-boot | 22.04 | 2022.01+dfsg-2ubuntu2.7 | vulnerable |
| Ubuntu | u-boot | 22.04 | 2022.01+dfsg-2ubuntu2.8 | vulnerable |
| Ubuntu | u-boot | 22.04 | 2022.01+dfsg-2ubuntu2.9 | vulnerable |
| Ubuntu | u-boot-nezha | 22.04 | 2021.09+git20211008.62392d3-0ubuntu1 | vulnerable |
| Ubuntu | u-boot-nezha | 22.04 | 2022.04+git20220405.7446a472-0ubuntu0.1 | vulnerable |
| Ubuntu | u-boot-nezha | 22.04 | 2022.04+git20220405.7446a472-0ubuntu0.2 | vulnerable |
| Ubuntu | u-boot-nezha | 22.04 | 2022.04+git20220405.7446a472-0ubuntu0.3 | vulnerable |
| Ubuntu | u-boot-nezha | 22.04 | 2022.04+git20220405.7446a472-0ubuntu0.4 | vulnerable |
| Ubuntu | u-boot | 24.04 | 2023.07+dfsg-1ubuntu2 | vulnerable |
| Ubuntu | u-boot | 24.04 | 2024.01+dfsg-1ubuntu1 | vulnerable |
| Ubuntu | u-boot | 24.04 | 2024.01+dfsg-1ubuntu2 | vulnerable |
| Ubuntu | u-boot | 24.04 | 2024.01+dfsg-1ubuntu3 | vulnerable |
| Ubuntu | u-boot | 24.04 | 2024.01+dfsg-1ubuntu4 | vulnerable |
| Ubuntu | u-boot | 24.04 | 2024.01+dfsg-1ubuntu5 | vulnerable |
| Ubuntu | u-boot | 24.04 | 2024.01+dfsg-1ubuntu5.1 | vulnerable |
| Ubuntu | u-boot | 24.04 | 2024.01+dfsg-1ubuntu5.2 | vulnerable |
| Ubuntu | u-boot | 24.04 | 2025.01-0ubuntu0.24.04.1 | vulnerable |
| Ubuntu | u-boot | 24.04 | 2025.01-0ubuntu0.24.04.2 | vulnerable |
| Ubuntu | u-boot | 24.04 | 2025.10-0ubuntu0.24.04.1 | vulnerable |
| Ubuntu | u-boot | 24.04 | 2025.10-0ubuntu0.24.04.2 | vulnerable |
| Ubuntu | u-boot | 24.04 | 2025.10-0ubuntu0.24.04.3 | vulnerable |
| Ubuntu | u-boot | 24.04 | 2025.10-0ubuntu0.24.04.4 | vulnerable |
| Ubuntu | u-boot-nezha | 24.04 | 2022.10-1089-g528ae9bc6c-0ubuntu2 | vulnerable |
| Ubuntu | u-boot-nezha | 24.04 | 2024.01~rc1-190-g2e89b706f5-0ubuntu1 | vulnerable |
| Ubuntu | u-boot-nezha | 24.04 | 2024.01~rc1-190-g2e89b706f5-0ubuntu2 | vulnerable |
| Ubuntu | u-boot-nezha | 24.04 | 2024.01~rc1-190-g2e89b706f5-0ubuntu2.24.04.2 | vulnerable |
| Ubuntu | u-boot | 26.10 | 2025.10-0ubuntu2 | vulnerable |
| Ubuntu | u-boot | 26.10 | 2025.10-0ubuntu3 | vulnerable |
| Ubuntu | u-boot | 26.10 | 2025.10-0ubuntu4 | vulnerable |
| Ubuntu | u-boot | 26.10 | 2025.10-0ubuntu5 | vulnerable |
| Ubuntu | u-boot | 26.10 | 2025.10-0ubuntu6 | vulnerable |
| Ubuntu | u-boot | 26.04 | 2025.01-3ubuntu4 | vulnerable |
| Ubuntu | u-boot | 26.04 | 2025.10-0ubuntu1 | vulnerable |
| Ubuntu | u-boot | 26.04 | 2025.10-0ubuntu2 | vulnerable |
| Ubuntu | u-boot | 26.04 | 2025.10-0ubuntu2.1 | vulnerable |
| Ubuntu | u-boot | 26.04 | 2025.10-0ubuntu2.2 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | u-boot | source | sid | Not affected | unimportant | Not reported | Not reported |
| Debian | u-boot | source | forky | Not affected | unimportant | Not reported | Not reported |
| Debian | u-boot | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | u-boot | source | bookworm | Not affected | unimportant | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [u-boot-amlogic]Not affected
Source package: [u-boot]
Details (2)
2023.01+dfsg-2+deb12u3· arm64 · bookwormNot affected
nvd · u-boot · debian · bookworm
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityNot affected
nvd · u-boot · debian · bookworm
- [u-boot-mvebu]Not affected
Source package: [u-boot]
Details (2)
2023.01+dfsg-2+deb12u3· arm64 · bookwormNot affected
nvd · u-boot · debian · bookworm
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityNot affected
nvd · u-boot · debian · bookworm
- [u-boot-qcom]Not affected
Source package: [u-boot]
Details (2)
2023.01+dfsg-2+deb12u3· arm64 · bookwormNot affected
nvd · u-boot · debian · bookworm
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityNot affected
nvd · u-boot · debian · bookworm
- [u-boot-qemu]Not affected
Source package: [u-boot]
Details (4)
2023.01+dfsg-2+deb12u3· all · bookwormNot affected
nvd · u-boot · debian · bookworm
2023.01+dfsg-2+deb12u3· all · bookwormNot affected
nvd · u-boot · debian · bookworm
2023.01+dfsg-2+deb12u3· all · bookworm-securityNot affected
nvd · u-boot · debian · bookworm
2023.01+dfsg-2+deb12u3· all · bookworm-securityNot affected
nvd · u-boot · debian · bookworm
- [u-boot-rockchip]Not affected
Source package: [u-boot]
Details (2)
2023.01+dfsg-2+deb12u3· arm64 · bookwormNot affected
nvd · u-boot · debian · bookworm
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityNot affected
nvd · u-boot · debian · bookworm
- [u-boot-rpi]Not affected
Source package: [u-boot]
Details (2)
2023.01+dfsg-2+deb12u3· arm64 · bookwormNot affected
nvd · u-boot · debian · bookworm
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityNot affected
nvd · u-boot · debian · bookworm
- [u-boot-sunxi]Not affected
Source package: [u-boot]
Details (2)
2023.01+dfsg-2+deb12u3· arm64 · bookwormNot affected
nvd · u-boot · debian · bookworm
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityNot affected
nvd · u-boot · debian · bookworm
- [u-boot-tegra]Not affected
Source package: [u-boot]
Details (2)
2023.01+dfsg-2+deb12u3· arm64 · bookwormNot affected
nvd · u-boot · debian · bookworm
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityNot affected
nvd · u-boot · debian · bookworm
- [u-boot-tools]Not affected
Source package: [u-boot]
Details (4)
2023.01+dfsg-2+deb12u3· amd64 · bookwormNot affected
nvd · u-boot · debian · bookworm
2023.01+dfsg-2+deb12u3· arm64 · bookwormNot affected
nvd · u-boot · debian · bookworm
2023.01+dfsg-2+deb12u3· amd64 · bookworm-securityNot affected
nvd · u-boot · debian · bookworm
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityNot affected
nvd · u-boot · debian · bookworm
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-71974]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-71974]
- [https://security-tracker.debian.org/tracker/CVE-2026-71974]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-71974.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3660.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]