CVE-2026-53236

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-06-25. 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:

tcp: restrict SO_ATTACH_FILTER to priv users

This patch restricts the use of SO_ATTACH_FILTER (cBPF) on TCP sockets to users with CAP_NET_ADMIN capability.

This blocks potential side-channel attack where an unprivileged application attaches a filter to leak TCP sequence/acknowledgment numbers.

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 25, 2026

Last Modified

September 8, 2026

Advisory Details (6)

Auto-updated Jul 9, 2026
No patch confirmed yet.
generic

tcp: restrict SO_ATTACH_FILTER to priv users - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ede69b8f6670600e534591664584f810d7c385f9
generic

tcp: restrict SO_ATTACH_FILTER to priv users - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba
generic

tcp: restrict SO_ATTACH_FILTER to priv users - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c68517a3e18e20997808821c5559d0cba4d776c1
generic

tcp: restrict SO_ATTACH_FILTER to priv users - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/82b3e7ce10c53fc12aab8904745603efc74f8c07
generic

tcp: restrict SO_ATTACH_FILTER to priv users - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5d39580f68e6ddeedd15e587282207489dfb3da2
generic

tcp: restrict SO_ATTACH_FILTER to priv users - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3747de241a66ef2c7032d2cc2b826a47c5fa0f6a

Vendor Advisories for CVE-2026-53236(2)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-31.31) @ resolute2026-09-08ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1013.13) @ resolute2026-09-08ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-08ubuntu

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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)——
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (145 versions)7.0.13-1—

Additional Vendor Advisories

(3)

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 10× in last 7d / 65× 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 190 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. 2026-09-08 09:43 UTCVendor advisory
  5. 2026-09-08 09:43 UTCGHSA enrichment
  6. 2026-09-08 08:58 UTCEG score recompute
  7. 2026-09-08 08:58 UTCVendor advisory
  8. 2026-09-08 08:57 UTCGHSA enrichment
  9. 2026-09-07 16:01 UTCEPSS rescore
  10. 2026-09-06 13:47 UTCEPSS rescore
  11. 2026-09-04 05:06 UTCEPSS rescore
  12. 2026-09-02 14:12 UTCEPSS rescore
  13. 2026-09-01 13:54 UTCEPSS rescore
  14. 2026-09-01 04:40 UTCEPSS rescore
  15. 2026-08-30 19:37 UTCEG score recompute
  16. 2026-08-30 19:37 UTCVendor advisory
  17. 2026-08-30 19:37 UTCGHSA enrichment
  18. 2026-08-30 01:22 UTCEPSS rescore
  19. 2026-08-28 21:41 UTCEPSS rescore
  20. 2026-08-27 23:58 UTCEG score recompute
  21. 2026-08-27 23:58 UTCVendor advisory
  22. 2026-08-27 23:58 UTCGHSA enrichment
  23. 2026-08-27 14:25 UTCEPSS rescore
  24. 2026-08-26 14:46 UTCEPSS rescore
  25. 2026-08-25 13:49 UTCEPSS rescore
Show 75 more
  1. 2026-08-24 21:52 UTCEG score recompute
  2. 2026-08-24 21:52 UTCVendor advisory
  3. 2026-08-24 21:52 UTCGHSA enrichment
  4. 2026-08-23 13:39 UTCEG score recompute
  5. 2026-08-23 13:39 UTCVendor advisory
  6. 2026-08-23 13:39 UTCGHSA enrichment
  7. 2026-08-23 00:19 UTCEPSS rescore
  8. 2026-08-22 11:29 UTCEG score recompute
  9. 2026-08-22 11:29 UTCVendor advisory
  10. 2026-08-22 11:29 UTCGHSA enrichment
  11. 2026-08-21 23:49 UTCEPSS rescore
  12. 2026-08-21 09:18 UTCEG score recompute
  13. 2026-08-21 09:18 UTCVendor advisory
  14. 2026-08-21 09:18 UTCGHSA enrichment
  15. 2026-08-20 22:55 UTCEPSS rescore
  16. 2026-08-20 07:07 UTCEG score recompute
  17. 2026-08-20 07:07 UTCVendor advisory
  18. 2026-08-20 07:07 UTCGHSA enrichment
  19. 2026-08-19 17:04 UTCEPSS rescore
  20. 2026-08-19 01:31 UTCEG score recompute
  21. 2026-08-19 01:31 UTCVendor advisory
  22. 2026-08-19 01:31 UTCGHSA enrichment
  23. 2026-08-18 13:48 UTCEPSS rescore
  24. 2026-08-17 13:47 UTCEPSS rescore
  25. 2026-08-16 16:07 UTCEG score recompute
  26. 2026-08-16 16:07 UTCVendor advisory
  27. 2026-08-16 16:07 UTCGHSA enrichment
  28. 2026-08-16 14:56 UTCEPSS rescore
  29. 2026-08-16 02:14 UTCEPSS rescore
  30. 2026-08-15 13:57 UTCEG score recompute
  31. 2026-08-15 13:57 UTCVendor advisory
  32. 2026-08-15 13:57 UTCGHSA enrichment
  33. 2026-08-15 01:30 UTCEPSS rescore
  34. 2026-08-14 11:46 UTCEG score recompute
  35. 2026-08-14 11:46 UTCVendor advisory
  36. 2026-08-14 11:46 UTCGHSA enrichment
  37. 2026-08-13 22:00 UTCEPSS rescore
  38. 2026-08-13 09:36 UTCEG score recompute
  39. 2026-08-13 09:36 UTCVendor advisory
  40. 2026-08-13 09:36 UTCGHSA enrichment
  41. 2026-08-12 13:51 UTCEPSS rescore
  42. 2026-08-12 07:25 UTCEG score recompute
  43. 2026-08-12 07:25 UTCVendor advisory
  44. 2026-08-12 07:25 UTCGHSA enrichment
  45. 2026-08-11 05:10 UTCEG score recompute
  46. 2026-08-11 05:10 UTCVendor advisory
  47. 2026-08-11 05:10 UTCGHSA enrichment
  48. 2026-08-11 00:00 UTCEPSS rescore
  49. 2026-08-10 03:00 UTCEG score recompute
  50. 2026-08-10 03:00 UTCVendor advisory
  51. 2026-08-10 03:00 UTCGHSA enrichment
  52. 2026-08-09 13:46 UTCEPSS rescore
  53. 2026-08-09 00:50 UTCEG score recompute
  54. 2026-08-09 00:50 UTCVendor advisory
  55. 2026-08-09 00:50 UTCGHSA enrichment
  56. 2026-08-08 16:37 UTCEPSS rescore
  57. 2026-08-07 22:39 UTCEG score recompute
  58. 2026-08-07 22:39 UTCGHSA enrichment
  59. 2026-08-06 20:29 UTCEG score recompute
  60. 2026-08-06 20:29 UTCVendor advisory
  61. 2026-08-06 20:29 UTCGHSA enrichment
  62. 2026-08-06 13:47 UTCEPSS rescore
  63. 2026-08-05 19:17 UTCEPSS rescore
  64. 2026-08-05 18:19 UTCGHSA enrichment
  65. 2026-08-04 16:09 UTCEG score recompute
  66. 2026-08-04 16:09 UTCVendor advisory
  67. 2026-08-04 16:09 UTCGHSA enrichment
  68. 2026-08-04 15:10 UTCEPSS rescore
  69. 2026-08-04 10:39 UTCEPSS rescore
  70. 2026-08-03 13:58 UTCEG score recompute
  71. 2026-08-03 13:58 UTCVendor advisory
  72. 2026-08-03 13:58 UTCGHSA enrichment
  73. 2026-08-03 10:36 UTCEPSS rescore
  74. 2026-08-02 08:15 UTCEG score recompute
  75. 2026-08-02 08:15 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-53236?
CVE-2026-53236 is a medium vulnerability published on June 25, 2026. In the Linux kernel, the following vulnerability has been resolved: tcp: restrict SOATTACHFILTER to priv users This patch restricts the use of SOATTACHFILTER (cBPF) on TCP sockets to users with CAPNETADMIN capability. This blocks potential side-channel attack where an unprivileged application…
When was CVE-2026-53236 disclosed?
CVE-2026-53236 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53236 actively exploited?
CVE-2026-53236 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 97.7% of all scored CVEs.
What is the CVSS score of CVE-2026-53236?
CVE-2026-53236 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-53236?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53236, 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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