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CVE-2026-29009

U-Boot < 2026.07-rc2 Buffer Overflow in nfs_readlink_reply() via NFS READLINK

Published: Jul 8, 2026Updated: Jul 24, 2026 Sources: CVE List NVDCWE-120
8.2HIGH
NVD MITRE
EPSS Score
0.6%
Top 56.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
OpenVAS

Description

U-Boot before 2026.07-rc2 contains a buffer overflow vulnerability in nfs_readlink_reply() (net/nfs-common.c) when CONFIG_CMD_NFS is enabled, allowing a malicious or compromised NFS server to overflow the 2048-byte nfs_path_buff buffer by returning multiple relative symlink targets that are appended without cumulative length validation. Attackers can send two or more READLINK responses containing relative symlink targets of approximately 1100 bytes each to corrupt adjacent BSS variables including nfs_server_ip, nfs_server_mount_port, nfs_server_port, nfs_our_port, nfs_state, and rpc_id, potentially achieving memory corruption and control over the NFS client state machine.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:LA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:HAvailability
High
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Weaknesses

CWE-120

Affected Products

u-boot
u-boot
denx
oss-project
u-bootEmbedded
DevTools & CI / build-test-tools

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://y637f9qq2x.com/posts/u-boot-tcp-nfs-vulns/
y637f9qq2x.com
https://lists.denx.de/pipermail/u-boot/2026-May/617853.html
lists.denx.de
https://git.u-boot-project.org/u-boot/u-boot/-/releases/v2026.07-rc2
git.u-boot-project.org
and 3 more references View all →

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