CVE-2026-72351

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-15. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 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.

In the Linux kernel, the following vulnerability has been resolved:

gue: validate REMCSUM private option length

GUE private flags can indicate that remote checksum offload metadata is present. The private flags field itself is accounted for by guehdr_flags_len(), but guehdr_priv_flags_len() currently returns 0 even when GUE_PFLAG_REMCSUM is set.

This lets a packet with only the private flags field pass validate_gue_flags(), after which gue_remcsum() and gue_gro_remcsum() read the missing REMCSUM start/offset fields from the following bytes.

Account for GUE_PLEN_REMCSUM when GUE_PFLAG_REMCSUM is present so that malformed packets are rejected during option validation.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
52%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 17, 2026

Advisory Details (8)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

gue: validate REMCSUM private option length - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f618cbe9b24cd0202004d2db781d5f80ab77037f
generic

gue: validate REMCSUM private option length - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d335dcc6f521571d57117b8deeebc940836e5450
generic

gue: validate REMCSUM private option length - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7c6876ec1b227261b51803f784c7be1b2242a1a0
generic

gue: validate REMCSUM private option length - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/61e78679c7c9ca685bff58e4b6348304dc60aafd
generic

gue: validate REMCSUM private option length - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4a4a1d41c6e901e773bcf795f562a47fa71f692a
generic

gue: validate REMCSUM private option length - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2c4de9988e9ddc760b750d6b6e701c35ff60ad14
generic

gue: validate REMCSUM private option length - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2a99224c120823987e4d829726f4ecb33e03fc1e
generic

gue: validate REMCSUM private option length - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/158b9995d3c87f3b93f5c22df54a12e12a3438b3

Vendor Advisories for CVE-2026-72351(1)

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

Data Freshness Timeline

(refreshed 51× in last 7d / 51× 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. 2026-08-21 07:05 UTCGHSA enrichment
  2. 2026-08-21 03:24 UTCGHSA enrichment
  3. 2026-08-20 23:44 UTCEG score recompute
  4. 2026-08-20 23:44 UTCGHSA enrichment
  5. 2026-08-20 22:56 UTCEPSS rescore
  6. 2026-08-20 20:05 UTCGHSA enrichment
  7. 2026-08-20 16:26 UTCGHSA enrichment
  8. 2026-08-20 12:47 UTCGHSA enrichment
  9. 2026-08-20 09:03 UTCGHSA enrichment
  10. 2026-08-20 05:24 UTCGHSA enrichment
  11. 2026-08-20 01:44 UTCGHSA enrichment
  12. 2026-08-19 22:03 UTCGHSA enrichment
  13. 2026-08-19 18:24 UTCEG score recompute
  14. 2026-08-19 18:24 UTCGHSA enrichment
  15. 2026-08-19 17:04 UTCEPSS rescore
  16. 2026-08-19 13:41 UTCGHSA enrichment
  17. 2026-08-19 10:02 UTCGHSA enrichment
  18. 2026-08-19 06:20 UTCGHSA enrichment
  19. 2026-08-19 02:39 UTCGHSA enrichment
  20. 2026-08-18 22:53 UTCGHSA enrichment
  21. 2026-08-18 19:15 UTCGHSA enrichment
  22. 2026-08-18 15:35 UTCEG score recompute
  23. 2026-08-18 15:35 UTCGHSA enrichment
  24. 2026-08-18 13:49 UTCEPSS rescore
  25. 2026-08-18 13:49 UTCEPSS rescore
Show 26 more
  1. 2026-08-18 11:56 UTCGHSA enrichment
  2. 2026-08-18 08:16 UTCGHSA enrichment
  3. 2026-08-18 04:31 UTCGHSA enrichment
  4. 2026-08-18 00:51 UTCGHSA enrichment
  5. 2026-08-17 21:09 UTCGHSA enrichment
  6. 2026-08-17 17:28 UTCGHSA enrichment
  7. 2026-08-17 13:48 UTCEG score recompute
  8. 2026-08-17 13:48 UTCGHSA enrichment
  9. 2026-08-17 13:47 UTCEPSS rescore
  10. 2026-08-17 10:08 UTCEG score recompute
  11. 2026-08-17 10:08 UTCGHSA enrichment
  12. 2026-08-17 06:29 UTCEG score recompute
  13. 2026-08-17 06:29 UTCGHSA enrichment
  14. 2026-08-17 05:58 UTCEG score recompute▲ 9.80
  15. 2026-08-17 05:58 UTCGHSA enrichment
  16. 2026-08-17 05:54 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  17. 2026-08-17 05:30 UTCEG score recompute
  18. 2026-08-17 05:30 UTCGHSA enrichment
  19. 2026-08-17 05:24 UTCMITRE cvelistV5
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 02:15 UTCEPSS rescore
  23. 2026-08-15 06:36 UTCGHSA enrichment
  24. 2026-08-15 06:23 UTCNVD update
  25. 2026-08-15 06:06 UTCEG score recompute
  26. 2026-08-15 06:02 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-72351?
CVE-2026-72351 is a critical vulnerability published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: gue: validate REMCSUM private option length GUE private flags can indicate that remote checksum offload metadata is present. The private flags field itself is accounted for by guehdrflagslen(), but guehdrprivflags_len() currently…
When was CVE-2026-72351 disclosed?
CVE-2026-72351 was first published in the National Vulnerability Database on August 15, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72351 actively exploited?
CVE-2026-72351 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 47.7% of all scored CVEs.
What is the CVSS score of CVE-2026-72351?
CVE-2026-72351 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-72351?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72351, 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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