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

Quick assessment

Affected
u-boot u-boot
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 th

CVSS 4.8 · Medium
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I. Basic Information for CVE-2026-71974

Vulnerability Information

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Vulnerability Title
U-Boot before 2026.10-rc3 Out-of-Bounds Write via Android Bootmeth Partition Read
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
u-boot u-boot 0 ~ 2026.10-rc3 -

II. Public POCs for CVE-2026-71974

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III. Intelligence Information for CVE-2026-71974

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Other References for CVE-2026-71974 (5)

Same Patch Batch · u-boot · 2026-09-29 · 8 CVEs total

CVE-2026-74222 8.2 HIGH U-Boot before 2026.10-rc5 Use-After-Free in lwIP wget Receive Callback
CVE-2026-74221 8.2 HIGH U-Boot before 2026.10-rc5 Buffer Overflow via NFS READLINK
CVE-2026-74220 8.2 HIGH U-Boot before 2026.10-rc5 Buffer Overflow via NFS READ Reply
CVE-2026-71971 8.2 HIGH U-Boot before 2026.10-rc3 Out-of-Bounds Write in IP Fragment Reassembly
CVE-2026-74225 7.1 HIGH U-Boot before 2026.10-rc5 Out-of-Bounds Write via DHCPv6
CVE-2026-71972 5.9 MEDIUM U-Boot through 2026.10-rc5 Out-of-Bounds Write in BMP RLE8 Decoder
CVE-2026-71973 5.2 MEDIUM U-Boot before 2026.10-rc4 Integer Overflow in SquashFS Directory Table Allocation

IV. Related Vulnerabilities

Same product: u-boot
Same vendor: u-boot
Same weakness: CWE-787

V. Comments for CVE-2026-71974

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