critical
9.3
CWE
362 416
Advisory Published
CVE Published
Updated

CVE-2018-20836: Race Condition

First published: Tue Sep 25 2018(Updated: )

A flaw was found in the Linux kernel’s implementation of the SAS expander subsystem, where a race condition exists in the smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c. An attacker could abuse this flaw to corrupt memory and escalate privileges.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:3.10.0-1160.rt56.1131.el7
0:3.10.0-1160.rt56.1131.el7
redhat/kernel<0:3.10.0-1160.el7
0:3.10.0-1160.el7
redhat/kernel<0:3.10.0-957.65.1.el7
0:3.10.0-957.65.1.el7
redhat/kernel<0:3.10.0-1062.43.1.el7
0:3.10.0-1062.43.1.el7
debian/linux
5.10.223-1
5.10.226-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.13-1
Linux Kernel<3.16.72
Linux Kernel>=3.17<3.18.140
Linux Kernel>=3.19<4.4.180
Linux Kernel>=4.5<4.9.175
Linux Kernel>=4.10<4.14.118
Linux Kernel>=4.15<4.19.42
Ubuntu=16.04
Debian=8.0
Debian=9.0
Debian=10.0
F5 Traffix Systems Signaling Delivery Controller=5.0.0
F5 Traffix Systems Signaling Delivery Controller=5.1.0
NetApp Active IQ Unified Manager for VMware vSphere>=9.5
NetApp SnapProtect
netapp solidfire \& hci management node
netapp solidfire \& hci storage node
NetApp Storage Replication Adapter for Clustered Data ONTAP for VMware vSphere
NetApp VASA Provider>=7.2
NetApp Virtual Storage Console for VMware vSphere>=7.2
netapp hci compute node
openSUSE=15.0
openSUSE=15.1

Remedy

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b90cd6f2b905905fb42671009dc0e27c310a16ae

Remedy

https://github.com/torvalds/linux/commit/b90cd6f2b905905fb42671009dc0e27c310a16ae

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2018-20836?

    CVE-2018-20836 is classified as a high severity vulnerability due to its potential for privilege escalation and memory corruption.

  • How do I fix CVE-2018-20836?

    To fix CVE-2018-20836, users should update to the latest kernel version that addresses this vulnerability according to their distribution.

  • Which systems are affected by CVE-2018-20836?

    CVE-2018-20836 affects various versions of the Linux kernel up to version 4.19.42 as well as specific Red Hat kernel packages.

  • What types of attacks can exploit CVE-2018-20836?

    An attacker can exploit CVE-2018-20836 to potentially cause memory corruption and escalate privileges on the affected systems.

  • Which distributions provide patches for CVE-2018-20836?

    Patches for CVE-2018-20836 are available from major distributions such as Red Hat, Debian, and Ubuntu.

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