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TI-2026-23177 Aliases CVE-2026-29009GHSA-rqrq-75p3-gc68

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

Priority MEDIUM 45CWE-120Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · Low · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0074 54th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix Fixed u-boot (u-boot): 2026.07-rc2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
u-bootu-bootbefore 2026.07-rc22026.07-rc2Patch availableCNA
  • u-boot Vendoru-boot Affected before 2026.07-rc2 Fixed in 2026.07-rc2 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:denx:u-boot:*:*:*:*:*:*:*:*before 2026.04Vulnerableu-boot
cpe:2.3:a:denx:u-boot:2026.04:rc1:*:*:*:*:*:*2026.04 rc1Vulnerableu-boot
cpe:2.3:a:denx:u-boot:2026.04:rc2:*:*:*:*:*:*2026.04 rc2Vulnerableu-boot
cpe:2.3:a:denx:u-boot:2026.04:rc3:*:*:*:*:*:*2026.04 rc3Vulnerableu-boot
  • cpe:2.3:a:denx:u-boot:*:*:*:*:*:*:*:* Versions before 2026.04 Vulnerable ·u-boot
  • cpe:2.3:a:denx:u-boot:2026.04:rc1:*:*:*:*:*:* Versions 2026.04 rc1 Vulnerable ·u-boot
  • cpe:2.3:a:denx:u-boot:2026.04:rc2:*:*:*:*:*:* Versions 2026.04 rc2 Vulnerable ·u-boot
  • cpe:2.3:a:denx:u-boot:2026.04:rc3:*:*:*:*:*:* Versions 2026.04 rc3 Vulnerable ·u-boot

Remediation

  • Fix · CNA u-boot (u-boot) Fixed in 2026.07-rc2

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-29009
  2. 2026-10-03 Alias added: GHSA-rqrq-75p3-gc68

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • TI-2022-02168 Unchecked Download size in Uboot CVSS 3.1HIGH 7.7
  • TI-2025-28794 A lack of signature verification in the bootloader of DENX Software Engineering Das… CVSS 3.1MEDIUM 6.5
  • TI-2020-06770 In Das U-Boot through 2020.01, a double free has been found in the cmd/gpt.c… CVSS 3.1CRITICAL 9.8
  • TI-2022-12898 nfs_lookup_reply in net/nfs.c in Das U-Boot through 2022.04 (and through 2022.07-rc2) has… CVSS 3.1CRITICAL 9.8
  • TI-2019-10569 An issue was discovered in Das U-Boot through 2019.07. CVSS 3.0CRITICAL 9.8
  • TI-2019-10568 An issue was discovered in Das U-Boot through 2019.07. CVSS 3.0CRITICAL 9.8
See all 48 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences