What’s Vulnerable › Vulnerabilities

CVE-2026-71974: U-Boot before 2026.10-rc3 Out-of-Bounds Write via Android Bootmeth Partition Read

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-29 · updated 2026-09-30
• Weakness: CWE-787

Description

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.

Affected products

• u-boot: before 2026.10-rc3 — fixed in 2026.10-rc3

How to fix

Upgrade to a fixed version: u-boot 2026.10-rc3. Check the vendor advisory for mitigations.

References

• https://github.com/u-boot/u-boot
• https://github.com/u-boot/u-boot/blob/v2026.07/boot/bootmeth_android.c#L356
• https://github.com/u-boot/u-boot/commit/35432ef6fe2c79ab72709966e64815a45eb55c76
• https://patch.msgid.link/20260729-b4-android-bootmeth-oob-v1-1-31c3450ae0be@byteray.co.uk
• https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc3-out-of-bounds-write-via-android-bootmeth-partition-read

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