High severity8.2NVD Advisory· Published Sep 29, 2026

CVE-2026-74221

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

U Boot/U Bootllm-fuzzy
Range: <2026.10-rc5

Patches

Vulnerability mechanics

References

github.com/u-boot/u-boot/blob/v2026.07/net/nfs-common.cnvd
github.com/u-boot/u-boot/commit/1c0aff3a5fbfeee7a8948f624e0b8554e6e0d8fdnvd
www.vulncheck.com/advisories/u-boot-before-2026.10-rc5-buffer-overflow-via-nfs-readlinknvd

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cvss	0.533
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000