CVE-2026-29009

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.7%, top 48% 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 — 3 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
52%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 24, 2026

Advisory Details (6)

Auto-updated Aug 29, 2026
No patch confirmed yet.
generic

U-Boot TCP/NFS Vulnerabilities: Integer Underflow and Buffer Overflow in the World’s Most Popular Bootloader

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

U-Boot – deinde.dev

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.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
u-boot2021.01+dfsg-5 ... 2025.01-3.2 (53 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
u-boot2023.01+dfsg-2 ... 2025.01-3.2 (24 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
u-boot2025.01-3, 2025.01-3+deb13u1, 2025.01-3.1, 2025.01-3.2——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
u-boot2025.01-3, 2025.01-3.1, 2025.01-3.2——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 30× in last 7d / 197× 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.

Showing the most recent 100 of 288 total refreshes for this CVE.

  1. 2026-08-30 07:30 UTCEG score recompute
  2. 2026-08-30 07:30 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-28 21:41 UTCEPSS rescore
  5. 2026-08-28 02:43 UTCGHSA enrichment
  6. 2026-08-27 21:50 UTCEG score recompute
  7. 2026-08-27 21:50 UTCGHSA enrichment
  8. 2026-08-27 14:25 UTCEPSS rescore
  9. 2026-08-27 01:29 UTCEG score recompute
  10. 2026-08-27 01:29 UTCGHSA enrichment
  11. 2026-08-26 14:46 UTCEPSS rescore
  12. 2026-08-26 12:55 UTCGHSA enrichment
  13. 2026-08-26 08:24 UTCGHSA enrichment
  14. 2026-08-25 14:48 UTCEG score recompute
  15. 2026-08-25 14:48 UTCGHSA enrichment
  16. 2026-08-25 13:49 UTCEPSS rescore
  17. 2026-08-25 10:12 UTCGHSA enrichment
  18. 2026-08-25 05:07 UTCGHSA enrichment
  19. 2026-08-25 00:50 UTCGHSA enrichment
  20. 2026-08-24 20:33 UTCEG score recompute
  21. 2026-08-24 20:33 UTCGHSA enrichment
  22. 2026-08-24 14:17 UTCEPSS rescore
  23. 2026-08-24 13:59 UTCGHSA enrichment
  24. 2026-08-24 09:42 UTCEG score recompute
  25. 2026-08-24 09:42 UTCGHSA enrichment
Show 75 more
  1. 2026-08-24 04:07 UTCGHSA enrichment
  2. 2026-08-23 23:50 UTCGHSA enrichment
  3. 2026-08-23 19:33 UTCGHSA enrichment
  4. 2026-08-23 15:15 UTCGHSA enrichment
  5. 2026-08-23 10:58 UTCGHSA enrichment
  6. 2026-08-23 06:41 UTCGHSA enrichment
  7. 2026-08-23 02:23 UTCEG score recompute
  8. 2026-08-23 02:23 UTCGHSA enrichment
  9. 2026-08-23 00:19 UTCEPSS rescore
  10. 2026-08-22 21:57 UTCGHSA enrichment
  11. 2026-08-22 17:37 UTCGHSA enrichment
  12. 2026-08-22 12:24 UTCGHSA enrichment
  13. 2026-08-22 08:05 UTCGHSA enrichment
  14. 2026-08-22 03:47 UTCEG score recompute
  15. 2026-08-22 03:47 UTCGHSA enrichment
  16. 2026-08-21 23:49 UTCEPSS rescore
  17. 2026-08-21 22:45 UTCGHSA enrichment
  18. 2026-08-21 18:28 UTCGHSA enrichment
  19. 2026-08-21 14:10 UTCGHSA enrichment
  20. 2026-08-21 09:00 UTCGHSA enrichment
  21. 2026-08-21 04:33 UTCGHSA enrichment
  22. 2026-08-21 00:15 UTCEG score recompute
  23. 2026-08-21 00:15 UTCGHSA enrichment
  24. 2026-08-20 22:55 UTCEPSS rescore
  25. 2026-08-20 22:55 UTCEPSS rescore
  26. 2026-08-20 19:57 UTCGHSA enrichment
  27. 2026-08-20 15:37 UTCGHSA enrichment
  28. 2026-08-20 10:41 UTCGHSA enrichment
  29. 2026-08-20 06:24 UTCGHSA enrichment
  30. 2026-08-20 01:59 UTCEG score recompute
  31. 2026-08-20 01:59 UTCGHSA enrichment
  32. 2026-08-19 17:03 UTCEPSS rescore
  33. 2026-08-19 14:06 UTCGHSA enrichment
  34. 2026-08-19 09:48 UTCGHSA enrichment
  35. 2026-08-19 05:27 UTCGHSA enrichment
  36. 2026-08-19 01:03 UTCGHSA enrichment
  37. 2026-08-18 20:45 UTCEG score recompute
  38. 2026-08-18 20:45 UTCGHSA enrichment
  39. 2026-08-18 13:48 UTCEPSS rescore
  40. 2026-08-18 11:34 UTCGHSA enrichment
  41. 2026-08-18 07:16 UTCGHSA enrichment
  42. 2026-08-18 02:58 UTCGHSA enrichment
  43. 2026-08-17 22:29 UTCGHSA enrichment
  44. 2026-08-17 17:07 UTCEG score recompute
  45. 2026-08-17 17:07 UTCGHSA enrichment
  46. 2026-08-17 13:47 UTCEPSS rescore
  47. 2026-08-17 12:49 UTCGHSA enrichment
  48. 2026-08-17 08:31 UTCGHSA enrichment
  49. 2026-08-17 04:14 UTCGHSA enrichment
  50. 2026-08-16 23:56 UTCGHSA enrichment
  51. 2026-08-16 19:38 UTCEG score recompute
  52. 2026-08-16 19:38 UTCGHSA enrichment
  53. 2026-08-16 14:56 UTCEPSS rescore
  54. 2026-08-16 14:43 UTCGHSA enrichment
  55. 2026-08-16 10:26 UTCGHSA enrichment
  56. 2026-08-16 06:09 UTCEG score recompute
  57. 2026-08-16 06:09 UTCGHSA enrichment
  58. 2026-08-16 02:14 UTCEPSS rescore
  59. 2026-08-16 01:51 UTCGHSA enrichment
  60. 2026-08-15 21:33 UTCGHSA enrichment
  61. 2026-08-15 17:15 UTCGHSA enrichment
  62. 2026-08-15 12:58 UTCGHSA enrichment
  63. 2026-08-15 08:41 UTCGHSA enrichment
  64. 2026-08-15 04:23 UTCEG score recompute
  65. 2026-08-15 04:23 UTCGHSA enrichment
  66. 2026-08-15 01:30 UTCEPSS rescore
  67. 2026-08-15 00:02 UTCGHSA enrichment
  68. 2026-08-14 19:45 UTCGHSA enrichment
  69. 2026-08-14 15:27 UTCGHSA enrichment
  70. 2026-08-14 11:10 UTCGHSA enrichment
  71. 2026-08-14 06:53 UTCGHSA enrichment
  72. 2026-08-14 02:35 UTCGHSA enrichment
  73. 2026-08-13 22:18 UTCEG score recompute
  74. 2026-08-13 22:18 UTCGHSA enrichment
  75. 2026-08-13 22:00 UTCEPSS rescore

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 48.4% 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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