CVE-2026-74221

DiscoveredSep 29, 2026UpdatedSep 30, 2026

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.

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CVSS v3.1

8.2 HIGH

EPSS

0.34%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

Related IOCs

seen in the same coverage

Intelligence Reports1

1 intelligence report available

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CVSS v3.1 Detail

Attack VectorNETWORK

Attack ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

ScopeUNCHANGED

ConfidentialityNONE

IntegrityLOW

AvailabilityHIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Connections

2 relationships

CWE-195

source

Timeline

disclosure → media coverage

Sep 29, 2026

Disclosure — published as a CVE record.

Oct 21, 2026

ubuntu.com reports: USN-8930-2: U-Boot vulnerabilities