CVE-2026-52929sctp: stream: fully roll back denied add-stream state
Updated under an hour ago ()
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It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 637784ade221a3c8a7ecd0f583eddd95d6276b9a builds before 0cd2dc6dce8ca47212cd306ccd52eb315ef3cf85; from 637784ade221a3c8a7ecd0f583eddd95d6276b9a before a6724b7b812ac8793514a1d5938db5d9d29ae725; 637784ade221a3c8a7ecd0f583eddd95d6276b9a builds before 9662eb0401518f0b4681f10e7fbf688f504f24cf; 637784ade221a3c8a7ecd0f583eddd95d6276b9a builds before 7dd9a42b044aad2dbe037db1c1e2943582485b44; 637784ade221a3c8a7ecd0f583eddd95d6276b9a builds before 39dc2b0eb5371a669ebc9ec6072b9184eac95418; from 637784ade221a3c8a7ecd0f583eddd95d6276b9a before d5ea0b3e261fcb2cfff142675516165244cab1da; 637784ade221a3c8a7ecd0f583eddd95d6276b9a builds before 1c6773b8c081509dcd5cd2954f2b02c50c00f151; from 637784ade221a3c8a7ecd0f583eddd95d6276b9a before a5f8a90ac9f77c678a9781c0a464b635e0d63e49 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 4.15 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.94; from 6.13 before 6.18.36; from 6.19 before 7.0.13; 7.1; and 6 more ranges | NVD |
References
- https://git.kernel.org/stable/c/0cd2dc6dce8ca47212cd306ccd52eb315ef3cf85patch
- https://git.kernel.org/stable/c/a6724b7b812ac8793514a1d5938db5d9d29ae725patch
- https://git.kernel.org/stable/c/9662eb0401518f0b4681f10e7fbf688f504f24cfpatch
- https://git.kernel.org/stable/c/7dd9a42b044aad2dbe037db1c1e2943582485b44patch
- https://git.kernel.org/stable/c/39dc2b0eb5371a669ebc9ec6072b9184eac95418patch
- https://git.kernel.org/stable/c/d5ea0b3e261fcb2cfff142675516165244cab1dapatch
- https://git.kernel.org/stable/c/1c6773b8c081509dcd5cd2954f2b02c50c00f151patch
- https://git.kernel.org/stable/c/a5f8a90ac9f77c678a9781c0a464b635e0d63e49patch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.