CVE-2019-18683
HighAn issue was discovered in drivers/media/platform/vivid in the Linux kernel through 5.3.8. It is exploitable for privilege escalation on some Linux distributions where local users have /dev/video0 access, but only if the driver happens to be loaded. There are multiple race conditions during streaming stopping in this driver (part of the V4L2 subsystem). These issues are caused by wrong mutex locking in vivid_stop_generating_vid_cap(), vivid_stop_generating_vid_out(), sdr_cap_stop_streaming(), and the corresponding kthreads. At least one of these race conditions leads to a use-after-free.
CVSS 3.1 score
7.0
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness type
CWE-362CVE-2019-18683 is a Race Condition vulnerability
What is Race Condition?
The product contains a code sequence that can run concurrently with other code, creating unexpected states. Learn more on MITRE CWE
References
The following references provide additional information about CVE-2019-18683 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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Mailing List Third Party Advisory
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Packet Stormhttp://packetstormsecurity.com/files/155890/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.htmlThird Party Advisory VDB Entry
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Exploit Mailing List Third Party Advisory
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Mailing List Third Party Advisory
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Vendor Advisory
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Third Party Advisory
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Ubuntu Securityhttps://usn.ubuntu.com/4254-1/Third Party Advisory
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Ubuntu Securityhttps://usn.ubuntu.com/4254-2/Third Party Advisory
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Ubuntu Securityhttps://usn.ubuntu.com/4258-1/Third Party Advisory
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Ubuntu Securityhttps://usn.ubuntu.com/4284-1/Third Party Advisory
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Ubuntu Securityhttps://usn.ubuntu.com/4287-1/Third Party Advisory
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Ubuntu Securityhttps://usn.ubuntu.com/4287-2/Third Party Advisory
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Exploit Mailing List Third Party Advisory
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PatchKernel patch commithttps://seclists.org/bugtraq/2020/Jan/10
Frequently asked questions
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What is CVE-2019-18683?
CVE-2019-18683 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 , classified as a Race Condition flaw (CWE-362) . CVE-2019-18683 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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What is the CVSS score for CVE-2019-18683?
CVE-2019-18683 has a CVSS score of 7.0 out of 10, rated High severity (CVSS 3.1). The vector string is
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. -
Is there a patch available for CVE-2019-18683?
No patch is currently available for CVE-2019-18683. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
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Is CVE-2019-18683 actively exploited?
No — CVE-2019-18683 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
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What is Race Condition (CWE-362)?
The product contains a code sequence that can run concurrently with other code, creating unexpected states. View CWE-362 on MITRE CWE →