Is CVE-2018-20836 in the CISA KEV catalog?

No. CVE-2018-20836 is not currently on the CISA Known Exploited Vulnerabilities list.

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

CVE-2018-20836 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2018-20836?

CVE-2018-20836 has an EPSS score of 5.11% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-20836?

Upgrade linux on debian 11 to 5.2.6-1 or later. Fixes are available for 26 affected products.

CVE & CISA-KEV Catalog

CVE-2018-20836

HIGHEPSS 91th pctl

8.1

CVSS v3

NVD

Description

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.

CWE-362Race Condition CWE-416Use After Free

How to fix

Remediation Available

linuxDebian

Fixed in:5.2.6-1CVE-2018-20836

linuxUbuntu

Fixed in:4.4.0-157.185USN-4076-1

linux-awsUbuntu

Fixed in:4.4.0-1088.99USN-4076-1

linux-image-4.4.0-1052-kvmUbuntu

Fixed in:4.4.0-1052.59USN-4076-1

linux-image-4.4.0-1088-awsUbuntu

Fixed in:4.4.0-1088.99USN-4076-1

linux-image-4.4.0-1117-raspi2Ubuntu

Fixed in:4.4.0-1117.126USN-4076-1

linux-image-4.4.0-157-genericUbuntu

Fixed in:4.4.0-157.185USN-4076-1

linux-image-4.4.0-157-generic-lpaeUbuntu

Fixed in:4.4.0-157.185USN-4076-1

linux-image-4.4.0-157-lowlatencyUbuntu

Fixed in:4.4.0-157.185USN-4076-1

linux-image-4.4.0-157-powerpc-e500mcUbuntu

Fixed in:4.4.0-157.185USN-4076-1

linux-image-4.4.0-157-powerpc-smpUbuntu

Fixed in:4.4.0-157.185USN-4076-1

linux-image-4.4.0-157-powerpc64-embUbuntu

Fixed in:4.4.0-157.185USN-4076-1

linux-image-4.4.0-157-powerpc64-smpUbuntu

Fixed in:4.4.0-157.185USN-4076-1

linux-image-awsUbuntu

Fixed in:4.4.0.1088.91USN-4076-1

linux-image-genericUbuntu

Fixed in:4.4.0.157.165USN-4076-1

linux-image-generic-lpaeUbuntu

Fixed in:4.4.0.157.165USN-4076-1

linux-image-kvmUbuntu

Fixed in:4.4.0.1052.52USN-4076-1

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.157.165USN-4076-1

linux-image-powerpc-e500mcUbuntu

Fixed in:4.4.0.157.165USN-4076-1

linux-image-powerpc-smpUbuntu

Fixed in:4.4.0.157.165USN-4076-1

linux-image-powerpc64-embUbuntu

Fixed in:4.4.0.157.165USN-4076-1

linux-image-powerpc64-smpUbuntu

Fixed in:4.4.0.157.165USN-4076-1

linux-image-raspi2Ubuntu

Fixed in:4.4.0.1117.117USN-4076-1

linux-image-virtualUbuntu

Fixed in:4.4.0.157.165USN-4076-1

linux-kvmUbuntu

Fixed in:4.4.0-1052.59USN-4076-1

linux-raspi2Ubuntu

Fixed in:4.4.0-1117.126USN-4076-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

5.11%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Patch2

Third-Party Advisory12

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.