CVE-2020-27815

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

0.79% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 53.6% 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:3.1/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

Moderate. 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

2021-05-26 12:18Z5 YR AGO

Last updated

2024-08-04 16:25Z2 YR AGO

Reserved

2020-10-27

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

e19f1005bc88bc40da5e3f52be52541dbe90d051ccc02d87e7c9dc674a111073

• www.openwall.com[oss-security] 20201201 CVE-2020-27815 Linux kernel: jfs: array-index-out-of-bounds in dbAdjTreehttp://www.openwall.com/lists/oss-security/2020/11/30/5mailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20201228 Re: CVE-2020-27815 Linux kernel: jfs: array-index-out-of-bounds in dbAdjTreehttp://www.openwall.com/lists/oss-security/2020/12/28/1mailing-listx_refsource_MLIST
• www.debian.orgDSA-4843https://www.debian.org/security/2021/dsa-4843vendor-advisoryx_refsource_DEBIAN
• lists.debian.org[debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security updatehttps://lists.debian.org/debian-lts-announce/2021/02/msg00018.htmlmailing-listx_refsource_MLIST
• lists.debian.org[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security updatehttps://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlmailing-listx_refsource_MLIST
• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1897668%2Cx_refsource_MISC
• www.openwall.comhttps://www.openwall.com/lists/oss-security/2020/11/30/5%2Cx_refsource_MISC
• www.openwall.comhttps://www.openwall.com/lists/oss-security/2020/12/28/1%2Cx_refsource_MISC
• git.kernel.orghttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c61b3e4839007668360ed8b87d7da96d2e59fc6cx_refsource_MISC
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210702-0004/x_refsource_CONFIRM