CVE catalog
CVE-2026-71973
U-Boot before 2026.10-rc4 contains an integer overflow vulnerability in sqfs_read_directory_table() function when allocating the directory table buffer. Attackers can supply a crafted SquashFS image w
- Severity
- Medium · CVSS 5.2
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.18% · Oct 25, 2026
U-Boot before 2026.10-rc4 contains an integer overflow vulnerability in sqfs_read_directory_table() function when allocating the directory table buffer. Attackers can supply a crafted SquashFS image with an attacker-controlled superblock metablks_count value that causes heap buffer under-allocation and out-of-bounds writes, corrupting heap memory and crashing the bootloader.
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 | vulnerable |
| Debian | u-boot | forky | 2025.01-3.2 | vulnerable |
| Debian | u-boot | trixie | 2025.01-3+deb13u1 | vulnerable |
| Debian | u-boot | bookworm | 2023.01+dfsg-2+deb12u3 | vulnerable |
| Debian | u-boot | bookworm-security | 2023.01+dfsg-2+deb12u3 | vulnerable |
| 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 | (unfixed) | not yet assigned | Not reported | [1149671] |
| Debian | u-boot | source | forky | (unfixed) | not yet assigned | Not reported | [1149671] |
| Debian | u-boot | source | trixie | (unfixed) | not yet assigned | Not reported | [1149671] |
| Debian | u-boot | source | bookworm | (unfixed) | not yet assigned | Not reported | [1149671] |
Notes
[trixie] u-boot: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [u-boot-amlogic]Affected
Source package: [u-boot]
Details (2)
2023.01+dfsg-2+deb12u3· arm64 · bookwormAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
- [u-boot-mvebu]Affected
Source package: [u-boot]
Details (2)
2023.01+dfsg-2+deb12u3· arm64 · bookwormAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
- [u-boot-qcom]Affected
Source package: [u-boot]
Details (2)
2023.01+dfsg-2+deb12u3· arm64 · bookwormAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
- [u-boot-qemu]Affected
Source package: [u-boot]
Details (4)
2023.01+dfsg-2+deb12u3· all · bookwormAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
2023.01+dfsg-2+deb12u3· all · bookwormAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
2023.01+dfsg-2+deb12u3· all · bookworm-securityAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
2023.01+dfsg-2+deb12u3· all · bookworm-securityAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
- [u-boot-rockchip]Affected
Source package: [u-boot]
Details (2)
2023.01+dfsg-2+deb12u3· arm64 · bookwormAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
- [u-boot-rpi]Affected
Source package: [u-boot]
Details (2)
2023.01+dfsg-2+deb12u3· arm64 · bookwormAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
- [u-boot-sunxi]Affected
Source package: [u-boot]
Details (2)
2023.01+dfsg-2+deb12u3· arm64 · bookwormAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
- [u-boot-tegra]Affected
Source package: [u-boot]
Details (2)
2023.01+dfsg-2+deb12u3· arm64 · bookwormAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
- [u-boot-tools]Affected
Source package: [u-boot]
Details (4)
2023.01+dfsg-2+deb12u3· amd64 · bookwormAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
2023.01+dfsg-2+deb12u3· arm64 · bookwormAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
2023.01+dfsg-2+deb12u3· amd64 · bookworm-securityAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
2023.01+dfsg-2+deb12u3· arm64 · bookworm-securityAffected
nvd · u-boot · debian · bookworm; nvd · u-boot · debian · 12
[Debian 13 (Trixie)]
- [u-boot-amlogic-binaries]Affected
Source package: [u-boot]
Details (1)
2025.01-3· arm64 · trixieAffected
nvd · u-boot · debian · 13
- [u-boot-asahi]Affected
Source package: [u-boot]
Details (1)
2025.01-3· arm64 · trixieAffected
nvd · u-boot · debian · 13
- [u-boot-mvebu]Affected
Source package: [u-boot]
Details (1)
2025.01-3· arm64 · trixieAffected
nvd · u-boot · debian · 13
- [u-boot-qcom]Affected
Source package: [u-boot]
Details (1)
2025.01-3· arm64 · trixieAffected
nvd · u-boot · debian · 13
- [u-boot-qemu]Affected
Source package: [u-boot]
Details (2)
2025.01-3· all · trixieAffected
nvd · u-boot · debian · 13
2025.01-3· all · trixieAffected
nvd · u-boot · debian · 13
- [u-boot-rockchip]Affected
Source package: [u-boot]
Details (1)
2025.01-3· arm64 · trixieAffected
nvd · u-boot · debian · 13
- [u-boot-rpi]Affected
Source package: [u-boot]
Details (1)
2025.01-3· arm64 · trixieAffected
nvd · u-boot · debian · 13
- [u-boot-sitara-binaries]Affected
Source package: [u-boot]
Details (1)
2025.01-3· arm64 · trixieAffected
nvd · u-boot · debian · 13
- [u-boot-sunxi]Affected
Source package: [u-boot]
Details (1)
2025.01-3· arm64 · trixieAffected
nvd · u-boot · debian · 13
- [u-boot-tegra]Affected
Source package: [u-boot]
Details (1)
2025.01-3· arm64 · trixieAffected
nvd · u-boot · debian · 13
- [u-boot-tools]Affected
Source package: [u-boot]
Details (2)
2025.01-3· amd64 · trixieAffected
nvd · u-boot · debian · 13
2025.01-3· arm64 · trixieAffected
nvd · u-boot · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-71973]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-71973]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-71973]
- [https://security-tracker.debian.org/tracker/CVE-2026-71973]
- [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]