CVE-2026-89476

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/041f7df5a929d3e7435dd8387e8ea17f2d412b7d
https://git.kernel.org/stable/c/092acd3c55a4077b00489064615d8d2d898daf91
https://git.kernel.org/stable/c/2d867663c563e8009257b9edf9c8ec75d9bbf19a
https://git.kernel.org/stable/c/3faf13aff243ca9f78d08b1a2956ef5a6fc77b6e
https://git.kernel.org/stable/c/59f61c39cb99ee1737bd742a20094fe5653389bb
https://git.kernel.org/stable/c/793519e343867ee9a3e84f6cac07f81f2aec7b5d
https://git.kernel.org/stable/c/8320cbd81bc21a1ca6ebdf70ad610ebc5ef1bd68
https://git.kernel.org/stable/c/d02a5794c3deedcb8476d017fcee2b7aaedab2e1

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-11 20:19

Updated : 2026-09-14 13:19

NVD link : CVE-2026-89476

Mitre link : CVE-2026-89476

CVE.ORG link : CVE-2026-89476

JSON object : View

Products Affected

No product.

CWE

No CWE.

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A\nduplicate response can therefore find and process the same ADD_OUT request\nagain while another parameter is still outstanding, rolling back outcnt\ntwice and possibly underflowing it.\n\nTrack outstanding request types as bits and clear each bit after its first\nresponse. Later responses for the same request are then ignored."}], "lastModified": "2026-09-14T13:19:03.980", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}