Signed to Unsigned Conversion Error Affecting u-boot package, versions *


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.34% (26th percentile)

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  • Snyk IDSNYK-ECHOLATEST-UBOOT-20335219
  • published30 Sept 2026
  • disclosed29 Sept 2026

Introduced: 29 Sep 2026

NewCVE-2026-74221  (opens in a new tab)
CWE-195  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest u-boot.

NVD Description

Note: Versions mentioned in the description apply only to the upstream u-boot package and not the u-boot package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

U-Boot before 2026.10-rc5 contains a buffer overflow in nfs_readlink_reply() function in net/nfs-common.c when processing NFS server responses. A malicious NFS server can send crafted READLINK replies with negative or oversized symlink length values to corrupt memory and crash the bootloader.

CVSS Base Scores

version 3.1