CVE-2026-29009
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.
Matched ports (1)
| Port | Package | Version | Status | Maintainer |
|---|---|---|---|---|
| sysutils/u-boot-tools | u-boot-tools | 2025.10 | unaddressed | uboot@FreeBSD.org |
Template for a VuXML entry
Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.
<vuln vid="FIXME (make newentry)">
<topic>FIXME -- FIXME</topic>
<affects>
<package>
<name>u-boot-tools</name>
<range><lt>2026.04</lt></range>
</package>
</affects>
<description>
<body xmlns="http://www.w3.org/1999/xhtml">
<p>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.</p>
</body>
</description>
<references>
<cvename>CVE-2026-29009</cvename>
<url>https://nvd.nist.gov/vuln/detail/CVE-2026-29009</url>
</references>
<dates>
<discovery>2026-07-08</discovery>
<entry>2026-10-26</entry>
</dates>
</vuln>