CVE-2026-71974

MEDIUM 4.8

U-Boot before 2026.10-rc3 Out-of-Bounds Write via Android Bootmeth Partition Read

CVSS Score

4.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-787
Vendor	u-boot
Product	u-boot
Published	Sep 29, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Attack Vector

Physical

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

High

Affected Versions

u-boot / u-boot

0 < 2026.10-rc3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/u-boot/u-boot/commit/35432ef6fe2c79ab72709966e64815a45eb55c76 github.com: https://github.com/u-boot/u-boot/blob/v2026.07/boot/bootmeth_android.c#L356 patch.msgid.link: https://patch.msgid.link/[email protected] github.com: https://github.com/u-boot/u-boot vulncheck.com: https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc3-out-of-bounds-write-via-android-bootmeth-partition-read

Credits

Shahriyar Jalayeri (ByteRay Ltd.) Mehrun P. Hunter (ByteRay Ltd.)