CVE-2026-52929 (GCVE-0-2026-52929)

Vulnerability from cvelistv5 – Published: 2026-06-24 07:14 – Updated: 2026-08-05 12:31
VLAI
Title
sctp: stream: fully roll back denied add-stream state
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 637784ade221a3c8a7ecd0f583eddd95d6276b9a , < 0cd2dc6dce8ca47212cd306ccd52eb315ef3cf85 (git)
Affected: 637784ade221a3c8a7ecd0f583eddd95d6276b9a , < a6724b7b812ac8793514a1d5938db5d9d29ae725 (git)
Affected: 637784ade221a3c8a7ecd0f583eddd95d6276b9a , < 9662eb0401518f0b4681f10e7fbf688f504f24cf (git)
Affected: 637784ade221a3c8a7ecd0f583eddd95d6276b9a , < 7dd9a42b044aad2dbe037db1c1e2943582485b44 (git)
Affected: 637784ade221a3c8a7ecd0f583eddd95d6276b9a , < 39dc2b0eb5371a669ebc9ec6072b9184eac95418 (git)
Affected: 637784ade221a3c8a7ecd0f583eddd95d6276b9a , < d5ea0b3e261fcb2cfff142675516165244cab1da (git)
Affected: 637784ade221a3c8a7ecd0f583eddd95d6276b9a , < 1c6773b8c081509dcd5cd2954f2b02c50c00f151 (git)
Affected: 637784ade221a3c8a7ecd0f583eddd95d6276b9a , < a5f8a90ac9f77c678a9781c0a464b635e0d63e49 (git)
Create a notification for this product.
Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (semver)
Unaffected: 6.18.36 , ≤ 6.18.* (semver)
Unaffected: 7.0.13 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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Unschedule the current scheduler state, drop\\nthe removed stream ext state with sctp_stream_outq_migrate(), and then\\nreschedule the remaining streams.\\n\\nThis keeps scheduler-private RR/FC/PRIO lists consistent while fully\\nrolling back denied outgoing stream 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T14:40:45+00:00",
      "cve": "CVE-2026-52929",
      "id": "CVE-2026-52929",
      "initial_release_date": "2026-06-24T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: sctp: stream: fully roll back denied add-stream state",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52929.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-06-25T02:19:55Z",
      "cve": "CVE-2026-52929",
      "id": "CVE-2026-52929",
      "initial_release_date": "2026-06-25T02:19:55Z",
      "product_status:known_affected": "226",
      "product_status:known_not_affected": "65",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-52929",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-52929.json",
      "version": "2"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.