High severity7.5NVD Advisory· Published Sep 11, 2026· Updated Oct 19, 2026
CVE-2026-89476
CVE-2026-89476
Description
In the Linux kernel, the following vulnerability has been resolved:
sctp: fix stream->outcnt underflow on duplicate RECONF responses
A cached RECONF chunk may contain more than one request parameter. A duplicate response can therefore find and process the same ADD_OUT request again while another parameter is still outstanding, rolling back outcnt twice and possibly underflowing it.
Track outstanding request types as bits and clear each bit after its first response. Later responses for the same request are then ignored.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- osv-coords2 versions
>= 4.12.0, < 5.10.270+ 1 more
- (no CPE)range: >= 4.12.0, < 5.10.270
- (no CPE)range: < 7.2.6-1.1
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/041f7df5a929d3e7435dd8387e8ea17f2d412b7dnvd
- git.kernel.org/stable/c/092acd3c55a4077b00489064615d8d2d898daf91nvd
- git.kernel.org/stable/c/2d867663c563e8009257b9edf9c8ec75d9bbf19anvd
- git.kernel.org/stable/c/3faf13aff243ca9f78d08b1a2956ef5a6fc77b6envd
- git.kernel.org/stable/c/59f61c39cb99ee1737bd742a20094fe5653389bbnvd
- git.kernel.org/stable/c/793519e343867ee9a3e84f6cac07f81f2aec7b5dnvd
- git.kernel.org/stable/c/8320cbd81bc21a1ca6ebdf70ad610ebc5ef1bd68nvd
- git.kernel.org/stable/c/d02a5794c3deedcb8476d017fcee2b7aaedab2e1nvd
News mentions
0No linked articles in our index yet.