CVE-2026-52985

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM 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
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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(medium)
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 PROB
0%
EPSS %ILE
2%
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.

Patch Availability(21)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-07-27ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-07-27ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-07-27ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-07-27ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-07-27ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-07-27ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-07-27ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-07-27ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-07-27ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-07-27ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-07-27ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-07-27ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-07-27ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-07-27ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-07-27ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-07-27ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-07-27ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-136.136.2~22.04.1) @ jammy2026-07-27ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-07-27ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-07-27ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-07-27ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Additional Vendor Advisories

(21)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 56× 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. 2026-07-27 17:39 UTCEG score recompute
  2. 2026-07-27 17:39 UTCVendor advisory
  3. 2026-07-27 17:39 UTCGHSA enrichment
  4. 2026-07-26 15:41 UTCEG score recompute
  5. 2026-07-26 15:41 UTCVendor advisory
  6. 2026-07-26 15:40 UTCGHSA enrichment
  7. 2026-07-26 14:54 UTCEPSS rescore
  8. 2026-07-25 14:18 UTCEPSS rescore
  9. 2026-07-24 14:18 UTCEPSS rescore
  10. 2026-07-23 14:18 UTCEPSS rescore
  11. 2026-07-23 03:19 UTCEG score recompute
  12. 2026-07-22 14:08 UTCEPSS rescore
  13. 2026-07-21 15:25 UTCEPSS rescore
  14. 2026-07-20 17:08 UTCEPSS rescore
  15. 2026-07-19 14:31 UTCEPSS rescore
  16. 2026-07-19 14:31 UTCEPSS rescore
  17. 2026-07-19 02:29 UTCEPSS rescore
  18. 2026-07-18 10:04 UTCEPSS rescore
  19. 2026-07-17 06:50 UTCEG score recompute▲ 5.50
  20. 2026-07-17 06:50 UTCVendor advisory
  21. 2026-07-17 06:50 UTCGHSA enrichment
  22. 2026-07-16 17:03 UTCEPSS rescore
  23. 2026-07-15 16:57 UTCEPSS rescore
  24. 2026-07-15 16:57 UTCEPSS rescore
  25. 2026-07-15 02:00 UTCEPSS rescore
Show 38 more
  1. 2026-07-15 02:00 UTCEPSS rescore
  2. 2026-07-14 17:20 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  3. 2026-07-14 08:20 UTCVendor advisory
  4. 2026-07-14 08:20 UTCGHSA enrichment
  5. 2026-07-13 22:31 UTCEPSS rescore
  6. 2026-07-13 06:13 UTCEPSS rescore
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-12 05:46 UTCEPSS rescore
  9. 2026-07-11 08:27 UTCEPSS rescore
  10. 2026-07-11 08:27 UTCEPSS rescore
  11. 2026-07-11 01:42 UTCVendor advisory
  12. 2026-07-11 01:42 UTCGHSA enrichment
  13. 2026-07-09 19:10 UTCEPSS rescore
  14. 2026-07-09 19:10 UTCEPSS rescore
  15. 2026-07-08 15:16 UTCEPSS rescore
  16. 2026-07-08 15:16 UTCEPSS rescore
  17. 2026-07-07 19:35 UTCGHSA enrichment
  18. 2026-07-07 13:46 UTCEPSS rescore
  19. 2026-07-07 13:46 UTCEPSS rescore
  20. 2026-07-06 02:23 UTCEPSS rescore
  21. 2026-07-06 02:23 UTCEPSS rescore
  22. 2026-07-05 02:31 UTCEPSS rescore
  23. 2026-07-05 02:30 UTCEPSS rescore
  24. 2026-07-04 12:45 UTCGHSA enrichment
  25. 2026-07-04 06:31 UTCEPSS rescore
  26. 2026-07-01 15:07 UTCEPSS rescore
  27. 2026-07-01 06:38 UTCGHSA enrichment
  28. 2026-06-30 23:22 UTCEPSS rescore
  29. 2026-06-29 14:06 UTCEPSS rescore
  30. 2026-06-29 14:06 UTCEPSS rescore
  31. 2026-06-28 14:07 UTCEPSS rescore
  32. 2026-06-28 04:56 UTCEPSS rescore
  33. 2026-06-28 04:56 UTCEPSS rescore
  34. 2026-06-28 00:32 UTCGHSA enrichment
  35. 2026-06-27 03:08 UTCEPSS rescore
  36. 2026-06-25 13:49 UTCEPSS rescore
  37. 2026-06-24 18:26 UTCEG score recompute
  38. 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 0% probability of exploitation in the next 30 days, which ranks it in the top 97.6% of all scored CVEs.
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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