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Advisories

U-Boot before 2026.10-rc5 Buffer Overflow via NFS READ Reply

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severity
high
date
Affecting

  • u-boot >= 0, < 2026.10-rc5

CWE
  • CWE-195 Signed to Unsigned Conversion Error
CVSS
8.8
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
Credit
Shahriyar Jalayeri (ByteRay Ltd.), Mehrun P. Hunter (ByteRay Ltd.)
Description
U-Boot before 2026.10-rc5 contains a buffer overflow in nfs_read_reply() function in net/nfs-common.c that allows attackers to corrupt memory by supplying crafted NFS READ reply lengths. A malicious NFS server can exploit signed integer handling to bypass length validation and write far past the destination buffer, crashing the bootloader or corrupting memory.

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