CVE-2026-29007

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH 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
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 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(high)
EPSS
37.7%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 14, 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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 22× in last 7d / 24× 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. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 04:57 UTCEG score recompute
  4. 2026-07-15 04:57 UTCGHSA enrichment
  5. 2026-07-15 02:00 UTCEPSS rescore
  6. 2026-07-15 02:00 UTCEPSS rescore
  7. 2026-07-14 02:53 UTCEG score recompute
  8. 2026-07-14 02:53 UTCGHSA enrichment
  9. 2026-07-13 22:30 UTCEPSS rescore
  10. 2026-07-13 06:13 UTCEPSS rescore
  11. 2026-07-13 06:13 UTCEPSS rescore
  12. 2026-07-13 00:48 UTCEG score recompute
  13. 2026-07-13 00:48 UTCGHSA enrichment
  14. 2026-07-12 05:46 UTCEPSS rescore
  15. 2026-07-11 22:41 UTCEG score recompute
  16. 2026-07-11 22:41 UTCGHSA enrichment
  17. 2026-07-11 08:27 UTCEPSS rescore
  18. 2026-07-10 20:36 UTCEG score recompute
  19. 2026-07-10 20:36 UTCGHSA enrichment
  20. 2026-07-09 19:10 UTCEPSS rescore
  21. 2026-07-09 18:31 UTCEG score recompute
  22. 2026-07-09 18:31 UTCGHSA enrichment
  23. 2026-07-08 16:24 UTCEG score recompute
  24. 2026-07-08 16:24 UTCMITRE cvelistV5first tracked

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 14, 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 37.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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

Explore the affected products and dependency analysis for CVE-2026-29007

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