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CVE-2018-20836

Good to know:

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Date: May 7, 2019

An 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.

Language: C

Severity Score

Related Resources (20)

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html
https://nvd.nist.gov/vuln/detail/CVE-2018-20836
https://seclists.org/bugtraq/2019/Aug/13
https://access.redhat.com/security/cve/CVE-2018-20836
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b90cd6f2b905905fb42671009dc0e27c310a16ae
https://www.debian.org/security/2019/dsa-4495
https://seclists.org/bugtraq/2019/Aug/18
http://www.securityfocus.com/bid/108196
https://security.netapp.com/advisory/ntap-20190719-0003/
https://github.com/torvalds/linux/commit/b90cd6f2b905905fb42671009dc0e27c310a16ae
https://lists.debian.org/debian-lts-announce/2019/08/msg00016.html
https://usn.ubuntu.com/4076-1/
https://people.canonical.com/~ubuntu-security/cve/CVE-2018-20836
https://support.f5.com/csp/article/K11225249
https://www.debian.org/security/2019/dsa-4497
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.html
https://security-tracker.debian.org/tracker/CVE-2018-20836
https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html
https://www.mend.io/vulnerability-database/CVE-2018-20836
https://www.mend.io/resources/blog/top-5-open-source-vulnerabilities-for-may-2019

Severity Score

Weakness Type (CWE)

Race Conditions

CWE-362

Use After Free

CWE-416

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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