CVE-2018-20856

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.70% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 52.9% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2019-07-26 04:40Z7 YR AGO

Last updated

2024-08-05 12:12Z2 YR AGO

Reserved

2019-07-26

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-416Use After FreeVariant
• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass

Data version

5.1

Document digest

833778bdf370b8e864d01afc4f9933e782cbceaa469bd2dc1ab142ae74cda64f

• cdn.kernel.orghttps://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.7x_refsource_MISC
• github.comhttps://github.com/torvalds/linux/commit/54648cf1ec2d7f4b6a71767799c45676a138ca24x_refsource_MISC
• git.kernel.orghttps://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54648cf1ec2d7f4b6a71767799c45676a138ca24x_refsource_MISC
• usn.ubuntu.comUSN-4094-1https://usn.ubuntu.com/4094-1/vendor-advisoryx_refsource_UBUNTU
• seclists.org20190813 [SECURITY] [DSA 4497-1] linux security updatehttps://seclists.org/bugtraq/2019/Aug/18mailing-listx_refsource_BUGTRAQ
• www.debian.orgDSA-4497https://www.debian.org/security/2019/dsa-4497vendor-advisoryx_refsource_DEBIAN
• seclists.org20190814 [slackware-security] Slackware 14.2 kernel (SSA:2019-226-01)https://seclists.org/bugtraq/2019/Aug/26mailing-listx_refsource_BUGTRAQ
• lists.debian.org[debian-lts-announce] 20190814 [SECURITY] [DLA 1885-1] linux-4.9 security updatehttps://lists.debian.org/debian-lts-announce/2019/08/msg00017.htmlmailing-listx_refsource_MLIST
• packetstormsecurity.comhttp://packetstormsecurity.com/files/154059/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.htmlx_refsource_MISC
• usn.ubuntu.comUSN-4116-1https://usn.ubuntu.com/4116-1/vendor-advisoryx_refsource_UBUNTU
• usn.ubuntu.comUSN-4118-1https://usn.ubuntu.com/4118-1/vendor-advisoryx_refsource_UBUNTU
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20190905-0002/x_refsource_CONFIRM
• packetstormsecurity.comhttp://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.htmlx_refsource_MISC
• support.f5.comhttps://support.f5.com/csp/article/K14673240?utm_source=f5support&amp%3Butm_medium=RSSx_refsource_CONFIRM
• access.redhat.comRHSA-2019:3076https://access.redhat.com/errata/RHSA-2019:3076vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2019:3055https://access.redhat.com/errata/RHSA-2019:3055vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2019:3089https://access.redhat.com/errata/RHSA-2019:3089vendor-advisoryx_refsource_REDHAT
• packetstormsecurity.comhttp://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.htmlx_refsource_MISC
• access.redhat.comRHSA-2019:3217https://access.redhat.com/errata/RHSA-2019:3217vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2020:0100https://access.redhat.com/errata/RHSA-2020:0100vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2020:0103https://access.redhat.com/errata/RHSA-2020:0103vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2020:0543https://access.redhat.com/errata/RHSA-2020:0543vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2020:0664https://access.redhat.com/errata/RHSA-2020:0664vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2020:0698https://access.redhat.com/errata/RHSA-2020:0698vendor-advisoryx_refsource_REDHAT