CVE-2026-89476High· 7.5▾ TwilightIn 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…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 5.9
none → medium
— → 7.5
none → high
7.5 → 5.9
high → medium
5.9 → 7.5
medium → high
7.5 → 7
0.2% → 0.7%
7 → 7.5
Last analysed / modified upstream
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.
Linux >= 11ae76e67a179f25ae8f772d62a7ddf717b1cdf3 < 041f7df5a929d3e7435dd8387e8ea17f2d412b7dLinux >= 11ae76e67a179f25ae8f772d62a7ddf717b1cdf3 < 59f61c39cb99ee1737bd742a20094fe5653389bbLinux >= 11ae76e67a179f25ae8f772d62a7ddf717b1cdf3 < 793519e343867ee9a3e84f6cac07f81f2aec7b5dLinux >= 11ae76e67a179f25ae8f772d62a7ddf717b1cdf3 < 092acd3c55a4077b00489064615d8d2d898daf91Linux >= 11ae76e67a179f25ae8f772d62a7ddf717b1cdf3 < 2d867663c563e8009257b9edf9c8ec75d9bbf19aLinux >= 11ae76e67a179f25ae8f772d62a7ddf717b1cdf3 < d02a5794c3deedcb8476d017fcee2b7aaedab2e1Linux >= 11ae76e67a179f25ae8f772d62a7ddf717b1cdf3 < 8320cbd81bc21a1ca6ebdf70ad610ebc5ef1bd68Linux >= 11ae76e67a179f25ae8f772d62a7ddf717b1cdf3 < 3faf13aff243ca9f78d08b1a2956ef5a6fc77b6eLinux 4.12Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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