CVE-2018-20836
No known exploitation. EPSS puts it in the 92nd percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
5.1% chance of exploitation activity in the next 30 days, which ranks it in the 92nd percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
6 events over 2606 days, from the signal feeds we watch.
- OpenVAS check added
- Patch availablerecord updated
- Publishedweakness classified, att&ck mapped
Affected products
- Suse Linux Enterprise DesktopOperating Systems / linux-distro
- SUSE Enterprise StorageOperating Systems / linux-distro
- SUSE Linux Enterprise Module for Open Buildservice Development ToolsOperating Systems / linux-distro
- SUSE Linux Enterprise Server for SAP ApplicationsOperating Systems / linux-distro
- SUSE Linux Enterprise Module for BasesystemOperating Systems / linux-distro
- SUSE CaaS PlatformOperating Systems / linux-distro
- SUSE Linux Enterprise Module for Development ToolsOperating Systems / linux-distro
- SUSE Linux Enterprise Point of SaleOperating Systems / linux-distro
- active iq unified managerHardware Firmware
- snapprotectHardware Firmware
- solidfire \& hci management nodeHardware Firmware
- solidfire \& hci storage nodeHardware Firmware
- storage replication adapter for clustered data ontapHardware Firmware
- vasa provider for clustered data ontapHardware Firmware
- virtual storage consoleHardware Firmware
- hci compute nodeHardware Firmware
And 11 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Scored 8.1 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1190Exploit Public-Facing Applicationhigh confidence
- Privilege EscalationT1068Exploitation for Privilege Escalationhigh confidence
Sources
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