CVE-2026-52985

MEDIUMNVD 5.55.5
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-06-24. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 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:

netdevsim: zero initialize struct iphdr in dummy sk_buff

Syzbot reports a KMSAN uninit-value originating from nsim_dev_trap_skb_build, with the allocation also being performed in the same function.

Fix this by calling skb_put_zero instead of skb_put to guarantee zero initialization of the whole IP header.

CVSS v3
5.5
EG Score
5.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
2.4%
KEV
Not listed

Published

June 24, 2026

Last Modified

July 14, 2026

Advisory Details (8)

Auto-updated Jul 19, 2026
No patch confirmed yet.
generic

netdevsim: zero initialize struct iphdr in dummy sk_buff - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bc6002865e8c4fcf9e94975f7cf023448d8764e2
generic

netdevsim: zero initialize struct iphdr in dummy sk_buff - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/978ca6ff789f1f19c03288ac20cc1f4774e88490
generic

netdevsim: zero initialize struct iphdr in dummy sk_buff - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/818f7673ed7f4a29d4b9cee8184c47d6e57162b4
generic

netdevsim: zero initialize struct iphdr in dummy sk_buff - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/750d0091bebf44975421268d37484ef87060d263
generic

netdevsim: zero initialize struct iphdr in dummy sk_buff - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6e2cfd0904976e701d7a76b86b694e72af230ab0
generic

netdevsim: zero initialize struct iphdr in dummy sk_buff - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/35eaa6d8d6c2ee65e96f507add856e0eacf24591
generic

netdevsim: zero initialize struct iphdr in dummy sk_buff - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1b7b6ae0e93b8d512e208b1378d74af052e4f4e7
generic

netdevsim: zero initialize struct iphdr in dummy sk_buff - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/175556c049eaec14efde8c6475e763b7579b9de7

Vendor Advisories for CVE-2026-52985(2)

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 10× in last 7d / 53× 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. 2026-07-24 14:18 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 03:19 UTCEG score recompute
  4. 2026-07-22 14:08 UTCEPSS rescore
  5. 2026-07-21 15:25 UTCEPSS rescore
  6. 2026-07-20 17:08 UTCEPSS rescore
  7. 2026-07-19 14:31 UTCEPSS rescore
  8. 2026-07-19 14:31 UTCEPSS rescore
  9. 2026-07-19 02:29 UTCEPSS rescore
  10. 2026-07-18 10:04 UTCEPSS rescore
  11. 2026-07-17 06:50 UTCEG score recompute 5.50
  12. 2026-07-17 06:50 UTCVendor advisory
  13. 2026-07-17 06:50 UTCGHSA enrichment
  14. 2026-07-16 17:03 UTCEPSS rescore
  15. 2026-07-15 16:57 UTCEPSS rescore
  16. 2026-07-15 16:57 UTCEPSS rescore
  17. 2026-07-15 02:00 UTCEPSS rescore
  18. 2026-07-15 02:00 UTCEPSS rescore
  19. 2026-07-14 17:20 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  20. 2026-07-14 08:20 UTCVendor advisory
  21. 2026-07-14 08:20 UTCGHSA enrichment
  22. 2026-07-13 22:31 UTCEPSS rescore
  23. 2026-07-13 06:13 UTCEPSS rescore
  24. 2026-07-13 06:13 UTCEPSS rescore
  25. 2026-07-12 05:46 UTCEPSS rescore
Show 30 more
  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-11 01:42 UTCVendor advisory
  4. 2026-07-11 01:42 UTCGHSA enrichment
  5. 2026-07-09 19:10 UTCEPSS rescore
  6. 2026-07-09 19:10 UTCEPSS rescore
  7. 2026-07-08 15:16 UTCEPSS rescore
  8. 2026-07-08 15:16 UTCEPSS rescore
  9. 2026-07-07 19:35 UTCGHSA enrichment
  10. 2026-07-07 13:46 UTCEPSS rescore
  11. 2026-07-07 13:46 UTCEPSS rescore
  12. 2026-07-06 02:23 UTCEPSS rescore
  13. 2026-07-06 02:23 UTCEPSS rescore
  14. 2026-07-05 02:31 UTCEPSS rescore
  15. 2026-07-05 02:30 UTCEPSS rescore
  16. 2026-07-04 12:45 UTCGHSA enrichment
  17. 2026-07-04 06:31 UTCEPSS rescore
  18. 2026-07-01 15:07 UTCEPSS rescore
  19. 2026-07-01 06:38 UTCGHSA enrichment
  20. 2026-06-30 23:22 UTCEPSS rescore
  21. 2026-06-29 14:06 UTCEPSS rescore
  22. 2026-06-29 14:06 UTCEPSS rescore
  23. 2026-06-28 14:07 UTCEPSS rescore
  24. 2026-06-28 04:56 UTCEPSS rescore
  25. 2026-06-28 04:56 UTCEPSS rescore
  26. 2026-06-28 00:32 UTCGHSA enrichment
  27. 2026-06-27 03:08 UTCEPSS rescore
  28. 2026-06-25 13:49 UTCEPSS rescore
  29. 2026-06-24 18:26 UTCEG score recompute
  30. 2026-06-24 18:02 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-52985?
CVE-2026-52985 is a medium vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: netdevsim: zero initialize struct iphdr in dummy sk_buff Syzbot reports a KMSAN uninit-value originating from nsimdevtrapskbbuild, with the allocation also being performed in the same function. Fix this by calling skbputzero…
When was CVE-2026-52985 disclosed?
CVE-2026-52985 was first published in the National Vulnerability Database on June 24, 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-2026-52985 actively exploited?
CVE-2026-52985 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-52985?
CVE-2026-52985 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-52985?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52985, 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-2026-52985

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