CVE-2026-52929

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. the CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 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:

sctp: stream: fully roll back denied add-stream state

When ADD_OUT_STREAMS is denied, SCTP only shrinks the queued chunks and then lowers outcnt. That leaves removed stream metadata behind, so a later re-add can reuse a stale ext and hit a null-pointer dereference in the scheduler get path.

Fix the rollback by tearing down the removed stream state the same way other stream resizes do. Unschedule the current scheduler state, drop the removed stream ext state with sctp_stream_outq_migrate(), and then reschedule the remaining streams.

This keeps scheduler-private RR/FC/PRIO lists consistent while fully rolling back denied outgoing stream additions.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
52%
KEV
Not listed

Published

June 24, 2026

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

sctp: stream: fully roll back denied add-stream state - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d5ea0b3e261fcb2cfff142675516165244cab1da
generic

sctp: stream: fully roll back denied add-stream state - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a6724b7b812ac8793514a1d5938db5d9d29ae725
generic

sctp: stream: fully roll back denied add-stream state - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a5f8a90ac9f77c678a9781c0a464b635e0d63e49
generic

sctp: stream: fully roll back denied add-stream state - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9662eb0401518f0b4681f10e7fbf688f504f24cf
generic

sctp: stream: fully roll back denied add-stream state - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7dd9a42b044aad2dbe037db1c1e2943582485b44
generic

sctp: stream: fully roll back denied add-stream state - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/39dc2b0eb5371a669ebc9ec6072b9184eac95418
generic

sctp: stream: fully roll back denied add-stream state - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1c6773b8c081509dcd5cd2954f2b02c50c00f151
generic

sctp: stream: fully roll back denied add-stream state - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0cd2dc6dce8ca47212cd306ccd52eb315ef3cf85

Vendor Advisories for CVE-2026-52929(2)

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

Affected Packages

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (54 versions)5.10.259-1—
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—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 85× 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 301 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 04:54 UTCEG score recompute
  17. 2026-08-28 04:54 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. 2026-08-25 01:37 UTCEG score recompute
  23. 2026-08-25 01:37 UTCVendor advisory
  24. 2026-08-25 01:37 UTCGHSA enrichment
  25. 2026-08-24 13:52 UTCEG score recompute
Show 75 more
  1. 2026-08-24 13:52 UTCVendor advisory
  2. 2026-08-24 13:52 UTCGHSA enrichment
  3. 2026-08-24 00:38 UTCVendor advisory
  4. 2026-08-24 00:38 UTCGHSA enrichment
  5. 2026-08-23 12:52 UTCVendor advisory
  6. 2026-08-23 12:52 UTCGHSA enrichment
  7. 2026-08-23 01:06 UTCEG score recompute
  8. 2026-08-23 01:06 UTCVendor advisory
  9. 2026-08-23 01:06 UTCGHSA enrichment
  10. 2026-08-23 00:19 UTCEPSS rescore
  11. 2026-08-22 13:20 UTCEG score recompute
  12. 2026-08-22 13:20 UTCVendor advisory
  13. 2026-08-22 13:20 UTCGHSA enrichment
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 19:07 UTCGHSA enrichment
  16. 2026-08-21 07:19 UTCEG score recompute
  17. 2026-08-21 07:19 UTCVendor advisory
  18. 2026-08-21 07:19 UTCGHSA enrichment
  19. 2026-08-20 22:55 UTCEPSS rescore
  20. 2026-08-20 19:22 UTCVendor advisory
  21. 2026-08-20 19:22 UTCGHSA enrichment
  22. 2026-08-20 07:37 UTCEG score recompute
  23. 2026-08-20 07:37 UTCVendor advisory
  24. 2026-08-20 07:37 UTCGHSA enrichment
  25. 2026-08-19 17:04 UTCEPSS rescore
  26. 2026-08-19 14:17 UTCVendor advisory
  27. 2026-08-19 14:16 UTCGHSA enrichment
  28. 2026-08-19 02:22 UTCEG score recompute
  29. 2026-08-19 02:22 UTCVendor advisory
  30. 2026-08-19 02:22 UTCGHSA enrichment
  31. 2026-08-18 13:48 UTCEPSS rescore
  32. 2026-08-17 13:47 UTCEPSS rescore
  33. 2026-08-17 08:05 UTCVendor advisory
  34. 2026-08-17 08:04 UTCGHSA enrichment
  35. 2026-08-16 20:19 UTCEG score recompute
  36. 2026-08-16 20:19 UTCVendor advisory
  37. 2026-08-16 20:19 UTCGHSA enrichment
  38. 2026-08-16 14:56 UTCEPSS rescore
  39. 2026-08-16 08:33 UTCEG score recompute
  40. 2026-08-16 08:33 UTCVendor advisory
  41. 2026-08-16 08:33 UTCGHSA enrichment
  42. 2026-08-16 02:14 UTCEPSS rescore
  43. 2026-08-15 20:48 UTCVendor advisory
  44. 2026-08-15 20:48 UTCGHSA enrichment
  45. 2026-08-15 08:54 UTCEG score recompute
  46. 2026-08-15 08:54 UTCVendor advisory
  47. 2026-08-15 08:54 UTCGHSA enrichment
  48. 2026-08-15 01:30 UTCEPSS rescore
  49. 2026-08-14 21:08 UTCVendor advisory
  50. 2026-08-14 21:08 UTCGHSA enrichment
  51. 2026-08-14 09:23 UTCEG score recompute
  52. 2026-08-14 09:23 UTCVendor advisory
  53. 2026-08-14 09:23 UTCGHSA enrichment
  54. 2026-08-13 22:00 UTCEPSS rescore
  55. 2026-08-13 21:37 UTCVendor advisory
  56. 2026-08-13 21:37 UTCGHSA enrichment
  57. 2026-08-13 09:51 UTCVendor advisory
  58. 2026-08-13 09:51 UTCGHSA enrichment
  59. 2026-08-12 22:06 UTCEG score recompute
  60. 2026-08-12 22:06 UTCGHSA enrichment
  61. 2026-08-12 13:51 UTCEPSS rescore
  62. 2026-08-12 10:21 UTCVendor advisory
  63. 2026-08-12 10:21 UTCGHSA enrichment
  64. 2026-08-11 22:33 UTCEG score recompute
  65. 2026-08-11 22:33 UTCVendor advisory
  66. 2026-08-11 22:33 UTCGHSA enrichment
  67. 2026-08-11 10:48 UTCEG score recompute
  68. 2026-08-11 10:48 UTCVendor advisory
  69. 2026-08-11 10:48 UTCGHSA enrichment
  70. 2026-08-11 00:00 UTCEPSS rescore
  71. 2026-08-10 23:02 UTCGHSA enrichment
  72. 2026-08-10 11:17 UTCGHSA enrichment
  73. 2026-08-09 23:30 UTCEG score recompute
  74. 2026-08-09 23:30 UTCGHSA enrichment
  75. 2026-08-09 13:46 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-52929?
CVE-2026-52929 is a high vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: sctp: stream: fully roll back denied add-stream state When ADDOUTSTREAMS is denied, SCTP only shrinks the queued chunks and then lowers outcnt. That leaves removed stream metadata behind, so a later re-add can reuse a stale ext and…
When was CVE-2026-52929 disclosed?
CVE-2026-52929 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52929 actively exploited?
CVE-2026-52929 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 48.3% of all scored CVEs.
What is the CVSS score of CVE-2026-52929?
CVE-2026-52929 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-52929?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52929, 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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