Vulnerability DatabaseCVE-2018-20836
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CVE-2018-20836
May 07, 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.
Related Resources (17)
https://seclists.org/bugtraq/2019/Aug/18
https://lists.debian.org/debian-lts-announce/2019/08/msg00016.html
https://security.netapp.com/advisory/ntap-20190719-0003/
https://seclists.org/bugtraq/2019/Aug/13
https://security-tracker.debian.org/tracker/CVE-2018-20836
https://access.redhat.com/security/cve/CVE-2018-20836
https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html
https://www.debian.org/security/2019/dsa-4497
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b90cd6f2b905905fb42671009dc0e27c310a16ae
https://usn.ubuntu.com/4076-1/
https://support.f5.com/csp/article/K11225249
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html
https://github.com/torvalds/linux/commit/b90cd6f2b905905fb42671009dc0e27c310a16ae
http://www.securityfocus.com/bid/108196
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2018-20836
https://www.debian.org/security/2019/dsa-4495
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CVSS v4
Base Score:
9.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
CVSS v2
Base Score:
9.3
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Weakness Type (CWE)
Use After Free
CWE-416
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-362
EPSS
Base Score:
3.89