CVE-2018-20836
HighAn issue was discovered in the Linux kernel before 4.20. There is a race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c, leading to a use-after-free.
CVSS 3.1 score
8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type
CWE-362CVE-2018-20836 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-2018-20836 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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Mailing List Third Party Advisory
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Securityfocushttp://www.securityfocus.com/bid/108196Third Party Advisory VDB Entry
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Mailing List Third Party Advisory
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Mailing List Third Party Advisory
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Mailing List Third Party Advisory
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Mailing List Third Party Advisory
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Third Party Advisory
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Third Party Advisory
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Ubuntu Securityhttps://usn.ubuntu.com/4076-1/Third Party Advisory
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Debian Securityhttps://www.debian.org/security/2019/dsa-4495Third Party Advisory
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Debian Securityhttps://www.debian.org/security/2019/dsa-4497Third Party Advisory
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PatchKernel patch commithttps://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b90cd6f2b905905fb42671009dc0e27c310a16ae
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PatchKernel patch commithttps://github.com/torvalds/linux/commit/b90cd6f2b905905fb42671009dc0e27c310a16ae
Frequently asked questions
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What is CVE-2018-20836?
CVE-2018-20836 is a High severity Linux kernel vulnerability with a CVSS score of 8.1 out of 10 , classified as a Race Condition flaw (CWE-362) . CVE-2018-20836 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-2018-20836?
CVE-2018-20836 has a CVSS score of 8.1 out of 10, rated High severity (CVSS 3.1). The vector string is
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. -
Is there a patch available for CVE-2018-20836?
No patch is currently available for CVE-2018-20836. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
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Is CVE-2018-20836 actively exploited?
No — CVE-2018-20836 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 →