CVE-2026-52928

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:

af_unix: Reject SIOCATMARK on non-stream sockets

SIOCATMARK reports whether the receive queue is at the urgent mark for MSG_OOB.

In AF_UNIX, MSG_OOB is supported only for SOCK_STREAM sockets. SOCK_DGRAM and SOCK_SEQPACKET reject MSG_OOB in sendmsg() and recvmsg(), so they should not support SIOCATMARK either.

Return -EOPNOTSUPP for non-stream sockets before checking the receive queue.

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 8, 2026

Advisory Details (7)

Auto-updated Jul 8, 2026
No patch confirmed yet.
generic

af_unix: Reject SIOCATMARK on non-stream sockets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f085971de6d6b8ef946a5e0bcd73ff24509a0f85
generic

af_unix: Reject SIOCATMARK on non-stream sockets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ec123873fdc83e7244c8ed6d17b8f8ea6c416a67
generic

af_unix: Reject SIOCATMARK on non-stream sockets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d119775f2bad827edc28071c061fdd4a91f889a5
generic

af_unix: Reject SIOCATMARK on non-stream sockets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c34c41446acf6c0d13b5b06c809be11e0f7f2729
generic

af_unix: Reject SIOCATMARK on non-stream sockets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b741c9c6ef59f17c1f104ddf1217ef77f79ed29b
generic

af_unix: Reject SIOCATMARK on non-stream sockets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/645b1ed3259af38b7814242a420bc2081bdd1eb6
generic

af_unix: Reject SIOCATMARK on non-stream sockets - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3147ddf5a41c20c45c2eb69e00b62f10f822056a

Vendor Advisories for CVE-2026-52928(2)

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux-6.16.1.106-3~deb11u1 ... 6.1.176-1~deb11u1 (21 versions)6.1.177-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (54 versions)6.1.177-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.88-1~bpo12+1 (21 versions)6.12.88-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.7-1~bpo13+1 (136 versions)7.0.7-1—

Additional Vendor Advisories

(8)

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 5× in last 7d / 62× 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 182 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. 2026-09-07 16:01 UTCEPSS rescore
  5. 2026-09-06 13:47 UTCEPSS rescore
  6. 2026-09-04 05:06 UTCEPSS rescore
  7. 2026-09-02 14:12 UTCEPSS rescore
  8. 2026-09-01 13:54 UTCEPSS rescore
  9. 2026-09-01 04:40 UTCEPSS rescore
  10. 2026-08-30 20:22 UTCEG score recompute
  11. 2026-08-30 20:22 UTCVendor advisory
  12. 2026-08-30 20:22 UTCGHSA enrichment
  13. 2026-08-30 19:17 UTCEPSS rescore
  14. 2026-08-30 01:22 UTCEPSS rescore
  15. 2026-08-28 21:41 UTCEPSS rescore
  16. 2026-08-28 04:55 UTCEG score recompute
  17. 2026-08-28 04:55 UTCVendor advisory
  18. 2026-08-28 04:54 UTCGHSA enrichment
  19. 2026-08-27 14:25 UTCEPSS rescore
  20. 2026-08-26 14:46 UTCEPSS rescore
  21. 2026-08-25 13:49 UTCEPSS rescore
  22. 2026-08-24 22:03 UTCEG score recompute
  23. 2026-08-24 22:03 UTCVendor advisory
  24. 2026-08-24 22:03 UTCGHSA enrichment
  25. 2026-08-23 14:28 UTCEG score recompute
Show 75 more
  1. 2026-08-23 14:28 UTCVendor advisory
  2. 2026-08-23 14:28 UTCGHSA enrichment
  3. 2026-08-23 00:19 UTCEPSS rescore
  4. 2026-08-22 13:20 UTCEG score recompute
  5. 2026-08-22 13:20 UTCVendor advisory
  6. 2026-08-22 13:20 UTCGHSA enrichment
  7. 2026-08-21 23:49 UTCEPSS rescore
  8. 2026-08-21 09:16 UTCVendor advisory
  9. 2026-08-21 09:16 UTCGHSA enrichment
  10. 2026-08-20 07:37 UTCEG score recompute
  11. 2026-08-20 07:37 UTCVendor advisory
  12. 2026-08-20 07:37 UTCGHSA enrichment
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-19 02:23 UTCEG score recompute
  15. 2026-08-19 02:23 UTCVendor advisory
  16. 2026-08-19 02:22 UTCGHSA enrichment
  17. 2026-08-18 13:48 UTCEPSS rescore
  18. 2026-08-17 13:47 UTCEPSS rescore
  19. 2026-08-17 06:12 UTCEG score recompute
  20. 2026-08-17 06:12 UTCVendor advisory
  21. 2026-08-17 06:11 UTCGHSA enrichment
  22. 2026-08-16 14:56 UTCEPSS rescore
  23. 2026-08-16 04:35 UTCEG score recompute
  24. 2026-08-16 04:35 UTCVendor advisory
  25. 2026-08-16 04:35 UTCGHSA enrichment
  26. 2026-08-16 02:14 UTCEPSS rescore
  27. 2026-08-15 03:28 UTCEG score recompute
  28. 2026-08-15 03:28 UTCVendor advisory
  29. 2026-08-15 03:28 UTCGHSA enrichment
  30. 2026-08-15 01:30 UTCEPSS rescore
  31. 2026-08-14 02:20 UTCEG score recompute
  32. 2026-08-14 02:20 UTCVendor advisory
  33. 2026-08-14 02:20 UTCGHSA enrichment
  34. 2026-08-13 22:00 UTCEPSS rescore
  35. 2026-08-13 01:13 UTCEG score recompute
  36. 2026-08-13 01:13 UTCVendor advisory
  37. 2026-08-13 01:13 UTCGHSA enrichment
  38. 2026-08-12 13:51 UTCEPSS rescore
  39. 2026-08-12 00:06 UTCEG score recompute
  40. 2026-08-12 00:06 UTCVendor advisory
  41. 2026-08-12 00:06 UTCGHSA enrichment
  42. 2026-08-11 00:00 UTCEPSS rescore
  43. 2026-08-10 22:59 UTCVendor advisory
  44. 2026-08-10 22:59 UTCGHSA enrichment
  45. 2026-08-09 21:52 UTCEG score recompute
  46. 2026-08-09 21:52 UTCVendor advisory
  47. 2026-08-09 21:52 UTCGHSA enrichment
  48. 2026-08-09 13:46 UTCEPSS rescore
  49. 2026-08-08 20:45 UTCEG score recompute
  50. 2026-08-08 20:45 UTCVendor advisory
  51. 2026-08-08 20:45 UTCGHSA enrichment
  52. 2026-08-08 16:37 UTCEPSS rescore
  53. 2026-08-07 19:37 UTCEG score recompute
  54. 2026-08-07 19:37 UTCVendor advisory
  55. 2026-08-07 19:37 UTCGHSA enrichment
  56. 2026-08-06 18:30 UTCEG score recompute
  57. 2026-08-06 18:30 UTCVendor advisory
  58. 2026-08-06 18:30 UTCGHSA enrichment
  59. 2026-08-06 13:47 UTCEPSS rescore
  60. 2026-08-05 19:17 UTCEPSS rescore
  61. 2026-08-05 17:23 UTCVendor advisory
  62. 2026-08-05 17:23 UTCGHSA enrichment
  63. 2026-08-04 15:13 UTCEG score recompute
  64. 2026-08-04 15:13 UTCVendor advisory
  65. 2026-08-04 15:13 UTCGHSA enrichment
  66. 2026-08-04 15:10 UTCEPSS rescore
  67. 2026-08-04 10:39 UTCEPSS rescore
  68. 2026-08-03 10:36 UTCEPSS rescore
  69. 2026-08-03 07:58 UTCVendor advisory
  70. 2026-08-03 07:58 UTCGHSA enrichment
  71. 2026-08-02 05:54 UTCEG score recompute
  72. 2026-08-02 05:54 UTCVendor advisory
  73. 2026-08-02 05:54 UTCGHSA enrichment
  74. 2026-08-02 02:27 UTCEPSS rescore
  75. 2026-08-01 04:47 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-52928?
CVE-2026-52928 is a medium vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: af_unix: Reject SIOCATMARK on non-stream sockets SIOCATMARK reports whether the receive queue is at the urgent mark for MSG_OOB. In AFUNIX, MSGOOB is supported only for SOCK_STREAM sockets. SOCKDGRAM and SOCKSEQPACKET reject…
When was CVE-2026-52928 disclosed?
CVE-2026-52928 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52928 actively exploited?
CVE-2026-52928 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 98.3% of all scored CVEs.
What is the CVSS score of CVE-2026-52928?
CVE-2026-52928 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-52928?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52928, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-52928

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