CVE-2026-52994

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
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:

vsock/virtio: fix MSG_ZEROCOPY pinned-pages accounting

virtio_transport_init_zcopy_skb() uses iter->count as the size argument for msg_zerocopy_realloc(), which in turn passes it to mm_account_pinned_pages() for RLIMIT_MEMLOCK accounting. However, this function is called after virtio_transport_fill_skb() has already consumed the iterator via __zerocopy_sg_from_iter(), so on the last skb, iter->count will be 0, skipping the RLIMIT_MEMLOCK enforcement.

Pass pkt_len (the total bytes being sent) as an explicit parameter to virtio_transport_init_zcopy_skb() instead of reading the already-consumed iter->count.

This matches TCP and UDP, which both call msg_zerocopy_realloc() with the original message size.

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
3%
KEV
Not listed

Published

June 24, 2026

Last Modified

July 15, 2026

Advisory Details (3)

Auto-updated Jul 15, 2026
No patch confirmed yet.
generic

vsock/virtio: fix MSG_ZEROCOPY pinned-pages accounting - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d0117950075f0a9d5944980784c719d8ebcd4bff
generic

vsock/virtio: fix MSG_ZEROCOPY pinned-pages accounting - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6af1736b5810bc8a4a43a8518530113f5a757dc1
generic

vsock/virtio: fix MSG_ZEROCOPY pinned-pages accounting - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1cb36e252211506f51095fe7ced8286cc77b4c80

Vendor Advisories for CVE-2026-52994(1)

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

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-08-30ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-30ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-30ubuntu

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.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (174 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (140 versions)7.0.10-1—

All Vendor Advisories

(8)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 4× in last 7d / 59× 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.

Showing the most recent 100 of 168 total refreshes for this CVE.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-10 09:35 UTCEPSS rescore
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-06 13:47 UTCEPSS rescore
  5. 2026-09-04 05:06 UTCEPSS rescore
  6. 2026-09-01 13:54 UTCEPSS rescore
  7. 2026-08-30 20:12 UTCEG score recompute
  8. 2026-08-30 20:12 UTCVendor advisory
  9. 2026-08-30 20:11 UTCGHSA enrichment
  10. 2026-08-30 19:17 UTCEPSS rescore
  11. 2026-08-30 01:22 UTCEPSS rescore
  12. 2026-08-28 21:41 UTCEPSS rescore
  13. 2026-08-28 04:47 UTCEG score recompute
  14. 2026-08-28 04:47 UTCVendor advisory
  15. 2026-08-28 04:46 UTCGHSA enrichment
  16. 2026-08-27 14:25 UTCEPSS rescore
  17. 2026-08-26 14:46 UTCEPSS rescore
  18. 2026-08-25 13:49 UTCEPSS rescore
  19. 2026-08-24 21:59 UTCEG score recompute
  20. 2026-08-24 21:59 UTCVendor advisory
  21. 2026-08-24 21:59 UTCGHSA enrichment
  22. 2026-08-23 14:38 UTCEG score recompute
  23. 2026-08-23 14:38 UTCVendor advisory
  24. 2026-08-23 14:38 UTCGHSA enrichment
  25. 2026-08-23 00:19 UTCEPSS rescore
Show 75 more
  1. 2026-08-22 13:06 UTCVendor advisory
  2. 2026-08-22 13:06 UTCGHSA enrichment
  3. 2026-08-21 09:14 UTCEG score recompute
  4. 2026-08-21 09:14 UTCVendor advisory
  5. 2026-08-21 09:13 UTCGHSA enrichment
  6. 2026-08-20 22:55 UTCEPSS rescore
  7. 2026-08-20 07:29 UTCEG score recompute
  8. 2026-08-20 07:29 UTCVendor advisory
  9. 2026-08-20 07:29 UTCGHSA enrichment
  10. 2026-08-19 17:04 UTCEPSS rescore
  11. 2026-08-19 02:11 UTCEG score recompute
  12. 2026-08-19 02:11 UTCVendor advisory
  13. 2026-08-19 02:10 UTCGHSA enrichment
  14. 2026-08-18 13:48 UTCEPSS rescore
  15. 2026-08-17 13:47 UTCEPSS rescore
  16. 2026-08-17 11:49 UTCEG score recompute
  17. 2026-08-17 11:49 UTCVendor advisory
  18. 2026-08-17 11:49 UTCGHSA enrichment
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 10:12 UTCEG score recompute
  21. 2026-08-16 10:12 UTCVendor advisory
  22. 2026-08-16 10:12 UTCGHSA enrichment
  23. 2026-08-16 02:14 UTCEPSS rescore
  24. 2026-08-15 08:40 UTCEG score recompute
  25. 2026-08-15 08:40 UTCVendor advisory
  26. 2026-08-15 08:40 UTCGHSA enrichment
  27. 2026-08-15 01:30 UTCEPSS rescore
  28. 2026-08-14 05:41 UTCEG score recompute
  29. 2026-08-14 05:41 UTCVendor advisory
  30. 2026-08-14 05:41 UTCGHSA enrichment
  31. 2026-08-13 22:00 UTCEPSS rescore
  32. 2026-08-13 04:08 UTCEG score recompute
  33. 2026-08-13 04:08 UTCVendor advisory
  34. 2026-08-13 04:08 UTCGHSA enrichment
  35. 2026-08-12 13:51 UTCEPSS rescore
  36. 2026-08-12 02:36 UTCVendor advisory
  37. 2026-08-12 02:36 UTCGHSA enrichment
  38. 2026-08-11 01:04 UTCEG score recompute
  39. 2026-08-11 01:04 UTCVendor advisory
  40. 2026-08-11 01:04 UTCGHSA enrichment
  41. 2026-08-11 00:00 UTCEPSS rescore
  42. 2026-08-09 23:31 UTCEG score recompute
  43. 2026-08-09 23:31 UTCVendor advisory
  44. 2026-08-09 23:31 UTCGHSA enrichment
  45. 2026-08-09 13:46 UTCEPSS rescore
  46. 2026-08-08 21:59 UTCEG score recompute
  47. 2026-08-08 21:59 UTCVendor advisory
  48. 2026-08-08 21:59 UTCGHSA enrichment
  49. 2026-08-08 16:37 UTCEPSS rescore
  50. 2026-08-07 20:26 UTCEG score recompute
  51. 2026-08-07 20:26 UTCVendor advisory
  52. 2026-08-07 20:26 UTCGHSA enrichment
  53. 2026-08-06 18:54 UTCEG score recompute
  54. 2026-08-06 18:54 UTCVendor advisory
  55. 2026-08-06 18:54 UTCGHSA enrichment
  56. 2026-08-06 13:47 UTCEPSS rescore
  57. 2026-08-05 17:22 UTCVendor advisory
  58. 2026-08-05 17:21 UTCGHSA enrichment
  59. 2026-08-04 15:11 UTCEG score recompute
  60. 2026-08-04 15:11 UTCVendor advisory
  61. 2026-08-04 15:11 UTCGHSA enrichment
  62. 2026-08-04 15:10 UTCEPSS rescore
  63. 2026-08-04 10:39 UTCEPSS rescore
  64. 2026-08-03 10:36 UTCEPSS rescore
  65. 2026-08-03 09:32 UTCVendor advisory
  66. 2026-08-03 09:32 UTCGHSA enrichment
  67. 2026-08-02 07:40 UTCEG score recompute
  68. 2026-08-02 07:40 UTCVendor advisory
  69. 2026-08-02 07:40 UTCGHSA enrichment
  70. 2026-08-02 02:27 UTCEPSS rescore
  71. 2026-08-01 06:08 UTCEG score recompute
  72. 2026-08-01 06:08 UTCVendor advisory
  73. 2026-08-01 06:07 UTCGHSA enrichment
  74. 2026-08-01 04:16 UTCEPSS rescore
  75. 2026-07-31 04:02 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-52994?
CVE-2026-52994 is a medium vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix MSG_ZEROCOPY pinned-pages accounting virtiotransportinitzcopyskb() uses iter->count as the size argument for msgzerocopyrealloc(), which in turn passes it to mmaccountpinnedpages() for RLIMITMEMLOCK accounting.…
When was CVE-2026-52994 disclosed?
CVE-2026-52994 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52994 actively exploited?
CVE-2026-52994 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 97.4% of all scored CVEs.
What is the CVSS score of CVE-2026-52994?
CVE-2026-52994 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-52994?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52994, 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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