{"id":"UBUNTU-CVE-2026-71974","details":"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.","modified":"2026-10-01T00:21:54.462720366Z","published":"2026-09-29T22:18:00Z","upstream":["CVE-2026-71974"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-71974"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-71974"},{"type":"REPORT","url":"https://github.com/u-boot/u-boot"},{"type":"REPORT","url":"https://github.com/u-boot/u-boot/blob/v2026.07/boot/bootmeth_android.c#L356"},{"type":"REPORT","url":"https://github.com/u-boot/u-boot/commit/35432ef6fe2c79ab72709966e64815a45eb55c76"},{"type":"REPORT","url":"https://patch.msgid.link/20260729-b4-android-bootmeth-oob-v1-1-31c3450ae0be@byteray.co.uk"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc3-out-of-bounds-write-via-android-bootmeth-partition-read"}],"affected":[{"package":{"name":"u-boot","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/u-boot?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2015.04+dfsg1-2ubuntu1","2015.10+dfsg1-2","2015.10+dfsg1-3","2015.10+dfsg1-4","2016.01+dfsg1-1","2016.01+dfsg1-1ubuntu1","2016.01+dfsg1-2ubuntu1","2016.01+dfsg1-2ubuntu2","2016.01+dfsg1-2ubuntu3","2016.01+dfsg1-2ubuntu5"],"ecosystem_specific":{"binaries":[{"binary_version":"2016.01+dfsg1-2ubuntu5","binary_name":"u-boot"},{"binary_name":"u-boot-exynos","binary_version":"2016.01+dfsg1-2ubuntu5"},{"binary_version":"2016.01+dfsg1-2ubuntu5","binary_name":"u-boot-imx"},{"binary_name":"u-boot-omap","binary_version":"2016.01+dfsg1-2ubuntu5"},{"binary_name":"u-boot-rockchip","binary_version":"2016.01+dfsg1-2ubuntu5"},{"binary_name":"u-boot-rpi","binary_version":"2016.01+dfsg1-2ubuntu5"},{"binary_name":"u-boot-sunxi","binary_version":"2016.01+dfsg1-2ubuntu5"},{"binary_name":"u-boot-tegra","binary_version":"2016.01+dfsg1-2ubuntu5"},{"binary_name":"u-boot-tools","binary_version":"2016.01+dfsg1-2ubuntu5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71974.json"}},{"package":{"name":"u-boot","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/u-boot?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2016.03+dfsg1-6ubuntu2","2018.07~rc3+dfsg1-0ubuntu1~18.04.1","2018.07~rc3+dfsg1-0ubuntu2~18.04.1","2018.07~rc3+dfsg1-0ubuntu3~18.04.1","2019.07+dfsg-1ubuntu4~18.04.1","2020.10+dfsg-1ubuntu0~18.04.2","2020.10+dfsg-1ubuntu0~18.04.3"],"ecosystem_specific":{"binaries":[{"binary_name":"u-boot","binary_version":"2020.10+dfsg-1ubuntu0~18.04.3"},{"binary_name":"u-boot-amlogic","binary_version":"2020.10+dfsg-1ubuntu0~18.04.3"},{"binary_name":"u-boot-exynos","binary_version":"2020.10+dfsg-1ubuntu0~18.04.3"},{"binary_name":"u-boot-imx","binary_version":"2020.10+dfsg-1ubuntu0~18.04.3"},{"binary_version":"2020.10+dfsg-1ubuntu0~18.04.3","binary_name":"u-boot-mvebu"},{"binary_version":"2020.10+dfsg-1ubuntu0~18.04.3","binary_name":"u-boot-omap"},{"binary_name":"u-boot-qcom","binary_version":"2020.10+dfsg-1ubuntu0~18.04.3"},{"binary_name":"u-boot-qemu","binary_version":"2020.10+dfsg-1ubuntu0~18.04.3"},{"binary_version":"2020.10+dfsg-1ubuntu0~18.04.3","binary_name":"u-boot-rockchip"},{"binary_name":"u-boot-rpi","binary_version":"2020.10+dfsg-1ubuntu0~18.04.3"},{"binary_name":"u-boot-sunxi","binary_version":"2020.10+dfsg-1ubuntu0~18.04.3"},{"binary_name":"u-boot-tegra","binary_version":"2020.10+dfsg-1ubuntu0~18.04.3"},{"binary_name":"u-boot-tools","binary_version":"2020.10+dfsg-1ubuntu0~18.04.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-71974.json"}},{"package":{"name":"u-boot","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/u-boot?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2019.07+dfsg-1ubuntu3","2019.07+dfsg-1ubuntu5","2019.07+dfsg-1ubuntu6","2020.10+dfsg-1ubuntu0~20.04.2","2021.01+dfsg-3ubuntu0~20.04.1","2021.01+dfsg-3ubuntu0~20.04.3","2021.01+dfsg-3ubuntu0~20.04.4","2021.01+dfsg-3ubuntu0~20.04.5","2021.01+dfsg-3ubuntu0~20.04.6"],"ecosystem_specific":{"binaries":[{"binary_name":"u-boot","binary_version":"2021.01+dfsg-3ubuntu0~20.04.6"},{"binary_name":"u-boot-amlogic","binary_version":"2021.01+dfsg-3ubuntu0~20.04.6"},{"binary_name":"u-boot-exynos","binary_version":"2021.01+dfsg-3ubuntu0~20.04.6"},{"binary_name":"u-boot-imx","binary_version":"2021.01+dfsg-3ubuntu0~20.04.6"},{"binary_name":"u-boot-mvebu","binary_version":"2021.01+dfsg-3ubuntu0~20.04.6"},{"binary_name":"u-boot-omap","binary_version":"2021.01+dfsg-3ubuntu0~20.04.6"},{"binary_name":"u-boot-qcom","binary_version":"2021.01+dfsg-3ubuntu0~20.04.6"},{"binary_name":"u-boot-qemu","binary_version":"2021.01+dfsg-3ubuntu0~20.04.6"},{"binary_name":"u-boot-rockchip","binary_version":"2021.01+dfsg-3ubuntu0~20.04.6"},{"binary_name":"u-boot-rpi","binary_version":"2021.01+dfsg-3ubuntu0~20.04.6"},{"binary_name":"u-boot-sifive"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