CVE-2026-29009

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 57% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 24, 2026

Advisory Details (6)

Auto-updated Jul 25, 2026
No patch confirmed yet.
generic

U-Boot TCP/NFS Vulnerabilities: Integer Underflow and Buffer Overflow in the World's Most Popular Bootloader | 637th Research Lab

https://y637f9qq2x.com/posts/u-boot-tcp-nfs-vulns/
generic

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

https://www.vulncheck.com/advisories/u-boot-rc3-buffer-overflow-in-nfs-readlink-reply-via-nfs-readlink
generic

Das U-Boot: The Universal Boot Loader

https://u-boot.org/
generic

Coordinated Vulnerability Disclosure - U-Boot Multiple Vulnerabilities (3)

https://lists.denx.de/pipermail/u-boot/2026-May/617853.html
generic

U-Boot v2026.07-rc2 · u-boot / U-Boot · GitLab

https://git.u-boot-project.org/u-boot/u-boot/-/releases/v2026.07-rc2
generic

net: nfs: fix buffer overflow in nfs_readlink_reply() (d6694018) · Commits · u-boot / U-Boot · GitLab

https://git.u-boot-project.org/u-boot/u-boot/-/commit/d6694018eaddefac6aae974f9cec72fd6e58f1bc

Vendor Advisories for CVE-2026-29009(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 31× in last 7d / 72× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-28 18:02 UTCEG score recompute
  2. 2026-07-28 18:02 UTCGHSA enrichment
  3. 2026-07-28 15:36 UTCEPSS rescore
  4. 2026-07-28 13:43 UTCGHSA enrichment
  5. 2026-07-28 09:21 UTCGHSA enrichment
  6. 2026-07-28 04:53 UTCGHSA enrichment
  7. 2026-07-28 00:35 UTCGHSA enrichment
  8. 2026-07-27 20:06 UTCGHSA enrichment
  9. 2026-07-27 15:39 UTCEG score recompute
  10. 2026-07-27 15:39 UTCGHSA enrichment
  11. 2026-07-27 10:23 UTCGHSA enrichment
  12. 2026-07-27 06:04 UTCGHSA enrichment
  13. 2026-07-27 01:23 UTCGHSA enrichment
  14. 2026-07-26 21:03 UTCGHSA enrichment
  15. 2026-07-26 16:45 UTCEG score recompute
  16. 2026-07-26 16:45 UTCGHSA enrichment
  17. 2026-07-26 14:54 UTCEPSS rescore
  18. 2026-07-26 14:54 UTCEPSS rescore
  19. 2026-07-26 12:27 UTCEG score recompute
  20. 2026-07-26 12:27 UTCGHSA enrichment
  21. 2026-07-26 05:08 UTCEG score recompute
  22. 2026-07-26 05:07 UTCGHSA enrichment
  23. 2026-07-25 14:18 UTCEPSS rescore
  24. 2026-07-25 14:17 UTCEPSS rescore
  25. 2026-07-24 14:17 UTCEPSS rescore
Show 47 more
  1. 2026-07-23 14:18 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 03:08 UTCEG score recompute▲ 1.60
  4. 2026-07-22 18:51 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  5. 2026-07-22 14:08 UTCEPSS rescore
  6. 2026-07-22 14:08 UTCEPSS rescore
  7. 2026-07-21 15:24 UTCEPSS rescore
  8. 2026-07-21 15:24 UTCEPSS rescore
  9. 2026-07-20 17:08 UTCEPSS rescore
  10. 2026-07-20 17:08 UTCEPSS rescore
  11. 2026-07-19 14:31 UTCEPSS rescore
  12. 2026-07-19 14:31 UTCEPSS rescore
  13. 2026-07-19 02:29 UTCEPSS rescore
  14. 2026-07-18 10:04 UTCEPSS rescore
  15. 2026-07-18 10:04 UTCEPSS rescore
  16. 2026-07-17 04:20 UTCGHSA enrichment
  17. 2026-07-16 17:03 UTCEPSS rescore
  18. 2026-07-16 17:03 UTCEPSS rescore
  19. 2026-07-16 17:02 UTCGHSA enrichment
  20. 2026-07-16 05:21 UTCGHSA enrichment
  21. 2026-07-15 18:03 UTCGHSA enrichment
  22. 2026-07-15 16:57 UTCEPSS rescore
  23. 2026-07-15 16:57 UTCEPSS rescore
  24. 2026-07-15 06:43 UTCGHSA enrichment
  25. 2026-07-15 02:00 UTCEPSS rescore
  26. 2026-07-15 02:00 UTCEPSS rescore
  27. 2026-07-14 19:25 UTCGHSA enrichment
  28. 2026-07-14 08:07 UTCGHSA enrichment
  29. 2026-07-13 22:30 UTCEPSS rescore
  30. 2026-07-13 20:49 UTCGHSA enrichment
  31. 2026-07-13 09:31 UTCGHSA enrichment
  32. 2026-07-13 06:13 UTCEPSS rescore
  33. 2026-07-13 06:13 UTCEPSS rescore
  34. 2026-07-12 22:13 UTCGHSA enrichment
  35. 2026-07-12 10:55 UTCGHSA enrichment
  36. 2026-07-12 05:46 UTCEPSS rescore
  37. 2026-07-11 23:37 UTCGHSA enrichment
  38. 2026-07-11 12:19 UTCGHSA enrichment
  39. 2026-07-11 08:27 UTCEPSS rescore
  40. 2026-07-11 01:01 UTCGHSA enrichment
  41. 2026-07-10 13:42 UTCGHSA enrichment
  42. 2026-07-10 02:23 UTCGHSA enrichment
  43. 2026-07-09 19:10 UTCEPSS rescore
  44. 2026-07-09 15:05 UTCGHSA enrichment
  45. 2026-07-09 03:42 UTCGHSA enrichment
  46. 2026-07-08 16:24 UTCEG score recompute
  47. 2026-07-08 16:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-29009?
CVE-2026-29009 is a critical vulnerability published on July 8, 2026. U-Boot before 2026.07-rc2 contains a buffer overflow vulnerability in nfsreadlinkreply() (net/nfs-common.c) when CONFIGCMDNFS is enabled, allowing a malicious or compromised NFS server to overflow the 2048-byte nfspathbuff buffer by returning multiple relative symlink targets that are appended…
When was CVE-2026-29009 disclosed?
CVE-2026-29009 was first published in the National Vulnerability Database on July 8, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-29009 actively exploited?
CVE-2026-29009 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.8% of all scored CVEs.
What is the CVSS score of CVE-2026-29009?
CVE-2026-29009 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-29009?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-29009, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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