CVE-2016-9794
HIGHCVSS 7.8/10EPSS 0.34%
Last modified
CVE-2016-9794 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Race condition in the snd_pcm_period_elapsed function in sound/core/pcm_lib.c in the ALSA subsystem in the Linux kernel before 4.7 allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a crafted SNDRV_PCM_TRIGGER_START command.. EPSS estimates a 0.34% chance of exploitation in the next 30 days.
Description
Race condition in the snd_pcm_period_elapsed function in sound/core/pcm_lib.c in the ALSA subsystem in the Linux kernel before 4.7 allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a crafted SNDRV_PCM_TRIGGER_START command.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 3.2.85 |
| Linux | Linux Kernel | >= 3.3, < 3.10.105 |
| Linux | Linux Kernel | >= 3.11, < 3.12.69 |
| Linux | Linux Kernel | >= 3.13, < 3.16.40 |
| Linux | Linux Kernel | >= 3.17, < 3.18.52 |
| Linux | Linux Kernel | >= 3.19, < 4.4.37 |
| Linux | Linux Kernel | >= 4.5, < 4.7 |
References
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2574.htmlThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/12/03/2Mailing List, Patch
- http://www.securityfocus.com/bid/94654Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1401494Issue Tracking
- https://github.com/torvalds/linux/commit/3aa02cb664c5fb1042958c8d1aa8c35055a2ebc4Patch, Vendor Advisory
- https://patchwork.kernel.org/patch/8752621/Issue Tracking
- https://source.android.com/security/bulletin/2017-05-01Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00057.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00062.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00072.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00075.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00081.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00088.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00091.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2574.htmlThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/12/03/2Mailing List, Patch
- http://www.securityfocus.com/bid/94654Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1401494Issue Tracking
- https://github.com/torvalds/linux/commit/3aa02cb664c5fb1042958c8d1aa8c35055a2ebc4Patch, Vendor Advisory
- https://patchwork.kernel.org/patch/8752621/Issue Tracking
- https://source.android.com/security/bulletin/2017-05-01Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2016-9794?
Race condition in the snd_pcm_period_elapsed function in sound/core/pcm_lib.c in the ALSA subsystem in the Linux kernel before 4.7 allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a crafted SNDRV_PCM_TRIGGER_START command.
How severe is CVE-2016-9794?
CVE-2016-9794 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.
How do I fix CVE-2016-9794?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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