CVE-2026-74221
High
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.
SeverityHigh
CVSS8.2
Exploit probability—
ProductU-boot
PublishedSep 29, 2026
First seenSep 29, 2026
Weakness typeCWE-195CWE-195
How to fix
Update
- u-boot u-boot2026.10-rc5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| u-boot u-boot | v < 2026.10-rc5 | 2026.10-rc5 |
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