CVE-2026-74737

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-27. 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:

net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG

On the packet reception path, the ID of the MAC Port on which the packet was received, is embedded in the RX DMA Descriptor's metadata. The ID is extracted using the helper function cppi5_desc_get_tags_ids() which fills in the 16-bit Source Tag into the 'port_id' variable. However, it is only the lower 8-bits of the 16-bit Source Tag that represent the MAC Port ID, while the upper 8-bits are Hardware-Reserved and carry an arbitrary value. With the existing logic, sporadic kernel crash is observed due to the subsequent driver code accessing out-of-bound memory because of an invalid port_id.

Hence, fix the port_id extraction logic to use only the lower 8-bits of the Source Tag as the MAC Port ID.

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
44%
KEV
Not listed

Published

August 26, 2026

Last Modified

August 27, 2026

Advisory Details (8)

Auto-updated Aug 27, 2026
No patch confirmed yet.
generic

net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9a220225efd6f58350bbb53fe70bdec08519267f
generic

net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/914e0100df3435bd14d09f397238e891cf9b7dce
generic

net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/72e4e3d7efc3b7d85f86abbe8b94f8e45074abe3
generic

net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/551688b410d3fb0dae7739724422f268cd9446d6
generic

net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/46a8e084a159e638ac2728e96980b65d752d65fd
generic

net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/36a05d2820077bb3955acb8111e1041d39148037
generic

net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1c0e35ce761131f82062222779d8574849790892
generic

net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/14fc40bf28390e0ebee6a072457c36b82c614100

Vendor Advisories for CVE-2026-74737(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 29× in last 7d / 29× 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. 2026-08-30 02:35 UTCEG score recompute
  2. 2026-08-30 02:35 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-29 22:47 UTCGHSA enrichment
  5. 2026-08-29 19:00 UTCGHSA enrichment
  6. 2026-08-29 15:12 UTCGHSA enrichment
  7. 2026-08-29 11:24 UTCGHSA enrichment
  8. 2026-08-29 07:34 UTCGHSA enrichment
  9. 2026-08-29 03:46 UTCGHSA enrichment
  10. 2026-08-28 23:58 UTCEG score recompute
  11. 2026-08-28 23:58 UTCGHSA enrichment
  12. 2026-08-28 21:42 UTCEPSS rescore
  13. 2026-08-28 17:05 UTCGHSA enrichment
  14. 2026-08-28 13:14 UTCGHSA enrichment
  15. 2026-08-28 09:25 UTCGHSA enrichment
  16. 2026-08-28 05:32 UTCGHSA enrichment
  17. 2026-08-28 01:41 UTCGHSA enrichment
  18. 2026-08-27 21:53 UTCGHSA enrichment
  19. 2026-08-27 18:06 UTCEG score recompute
  20. 2026-08-27 18:06 UTCGHSA enrichment
  21. 2026-08-27 14:25 UTCEPSS rescore
  22. 2026-08-27 13:57 UTCGHSA enrichment
  23. 2026-08-27 10:10 UTCEG score recompute
  24. 2026-08-27 10:10 UTCGHSA enrichment
  25. 2026-08-27 06:22 UTCEG score recompute▲ 9.80
Show 4 more
  1. 2026-08-27 06:11 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  2. 2026-08-26 15:43 UTCNVD update
  3. 2026-08-26 14:44 UTCEG score recompute
  4. 2026-08-26 14:41 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74737?
CVE-2026-74737 is a critical vulnerability published on August 26, 2026. In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG On the packet reception path, the ID of the MAC Port on which the packet was received, is embedded in the RX DMA Descriptor's metadata. The ID is extracted…
When was CVE-2026-74737 disclosed?
CVE-2026-74737 was first published in the National Vulnerability Database on August 26, 2026, with the most recent update on August 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74737 actively exploited?
CVE-2026-74737 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 56.0% of all scored CVEs.
What is the CVSS score of CVE-2026-74737?
CVE-2026-74737 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-74737?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74737, 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.

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