PT-2026-81210

CVE-2026-74221

Published

2026-08-25

Updated

2026-11-04

Description by

CVSS 4.0

8.8

High

MetricsAV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions U-Boot versions prior to 2026.10-rc5

Description A buffer overflow exists in the nfs readlink reply() function within net/nfs-common.c during the processing of NFS server responses. A malicious NFS server can trigger this by sending crafted READLINK replies containing negative or oversized symlink length values, leading to memory corruption and a bootloader crash.

Recommendations Update to version 2026.10-rc5 or later.

Exploitability

Exploit

Fix

Researchers

Shahriyar Jalayeri

Vendors

Affected products

Weakness enumeration

CWE-195: Signed to Unsigned Conversion Error

Related identifiers

CVE-2026-74221