sctp: stream: fully roll back denied add-stream state
Summary
| CVE | CVE-2026-52929 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-06-24 08:16:23 UTC |
| Updated | 2026-06-24 08:16:23 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.001640000 probability, percentile 0.059360000 (date 2026-06-24)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 637784ade221a3c8a7ecd0f583eddd95d6276b9a 0cd2dc6dce8ca47212cd306ccd52eb315ef3cf85 git | Not specified |
| CNA | Linux | Linux | affected 637784ade221a3c8a7ecd0f583eddd95d6276b9a a6724b7b812ac8793514a1d5938db5d9d29ae725 git | Not specified |
| CNA | Linux | Linux | affected 637784ade221a3c8a7ecd0f583eddd95d6276b9a 9662eb0401518f0b4681f10e7fbf688f504f24cf git | Not specified |
| CNA | Linux | Linux | affected 637784ade221a3c8a7ecd0f583eddd95d6276b9a 7dd9a42b044aad2dbe037db1c1e2943582485b44 git | Not specified |
| CNA | Linux | Linux | affected 637784ade221a3c8a7ecd0f583eddd95d6276b9a 39dc2b0eb5371a669ebc9ec6072b9184eac95418 git | Not specified |
| CNA | Linux | Linux | affected 637784ade221a3c8a7ecd0f583eddd95d6276b9a d5ea0b3e261fcb2cfff142675516165244cab1da git | Not specified |
| CNA | Linux | Linux | affected 637784ade221a3c8a7ecd0f583eddd95d6276b9a 1c6773b8c081509dcd5cd2954f2b02c50c00f151 git | Not specified |
| CNA | Linux | Linux | affected 637784ade221a3c8a7ecd0f583eddd95d6276b9a a5f8a90ac9f77c678a9781c0a464b635e0d63e49 git | Not specified |
| CNA | Linux | Linux | affected 4.15 | Not specified |
| CNA | Linux | Linux | unaffected 4.15 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.259 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.210 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.176 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.143 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.94 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.36 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0.13 7.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/9662eb0401518f0b4681f10e7fbf688f504f24cf | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a5f8a90ac9f77c678a9781c0a464b635e0d63e49 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/39dc2b0eb5371a669ebc9ec6072b9184eac95418 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a6724b7b812ac8793514a1d5938db5d9d29ae725 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/0cd2dc6dce8ca47212cd306ccd52eb315ef3cf85 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/1c6773b8c081509dcd5cd2954f2b02c50c00f151 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/7dd9a42b044aad2dbe037db1c1e2943582485b44 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d5ea0b3e261fcb2cfff142675516165244cab1da | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.