CVE-2026-80717: sctp: validate Adaptation Indication parameter length

mediumCVSS 5.3CVE-2026-80717

CSIRTS triage

vendor: Linux product: Linux kernel Denial of service

What: SCTP protocol handler does not validate Adaptation Indication parameter length, allowing malformed packets to cause denial of service.
Who is affected: Linux systems with SCTP support enabled processing untrusted network traffic.
Urgency: Medium; CVSS 5.3 indicates moderate DoS risk via network attack.
Action: Apply the latest Linux kernel patch for SCTP or disable SCTP if not required.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.3
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80717

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-807170.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 26% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-80717	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

highCVE-2026-80717: In the Linux kernel, the following vulnerability has been resolved: sctp: validate Adaptation …nvd

Recent advisories for sctp

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownCVE-2026-89479: In the Linux kernel, the following vulnerability has been resolved: sctp: stop processing a pa…nvd · 2026-09-11
unknownCVE-2026-89478: In the Linux kernel, the following vulnerability has been resolved: sctp: drop a chunk if its …nvd · 2026-09-11
unknownCVE-2026-89477: In the Linux kernel, the following vulnerability has been resolved: sctp: fix NULL deref on un…nvd · 2026-09-11
unknownCVE-2026-89476: In the Linux kernel, the following vulnerability has been resolved: sctp: fix stream->outcnt u…nvd · 2026-09-11
mediumCVE-2026-80890: sctp: reject stale cookies with mismatched verification tagsmsrc · 2026-09-08
unknownCVE-2026-80890: In the Linux kernel, the following vulnerability has been resolved: sctp: reject stale cookies…nvd · 2026-09-04