CVE-2026-29007

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-07-08. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.3Exploit: None knownExposed: 0

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

U-Boot through 2026.04-rc3 contains an out-of-bounds read vulnerability in tcp_rx_state_machine() (net/tcp.c) when CONFIG_PROT_TCP is enabled, allowing remote attackers to read beyond TCP segment boundaries by crafting a malicious packet with a mismatched IP total length and TCP data offset field. Attackers can send a packet with an IP total length of 40 bytes and a TCP data offset claiming 60 bytes of header to cause tcp_parse_options() to read 40 bytes past the end of the TCP segment, potentially corrupting connection state variables such as rmt_win_scale and rmt_timestamp to disrupt TCP window calculations.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
49%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 22, 2026

Advisory Details (3)

Auto-updated Jul 8, 2026
No patch confirmed yet.
generic

U-Boot 2026.04-rc3 Out-of-Bounds Read in tcp_rx_state_machine via tcp.c | Advisories | VulnCheck

https://www.vulncheck.com/advisories/u-boot-rc3-out-of-bounds-read-in-tcp-rx-state-machine-via-tcp-c
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

Vendor Advisories for CVE-2026-29007(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 16× in last 7d / 77× 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 129 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-29007?
CVE-2026-29007 is a medium vulnerability published on July 8, 2026. U-Boot through 2026.04-rc3 contains an out-of-bounds read vulnerability in tcprxstatemachine() (net/tcp.c) when CONFIGPROTTCP is enabled, allowing remote attackers to read beyond TCP segment boundaries by crafting a malicious packet with a mismatched IP total length and TCP data offset field.…
When was CVE-2026-29007 disclosed?
CVE-2026-29007 was first published in the National Vulnerability Database on July 8, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-29007 actively exploited?
CVE-2026-29007 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 50.9% of all scored CVEs.
What is the CVSS score of CVE-2026-29007?
CVE-2026-29007 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-29007?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-29007, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-29007

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