HOMEVULNERABILITIESCVE-2020-27815
HIGH

CVE-2020-27815

CWE-119Published: May 26, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the ability to set extended attributes to panic the system, causing memory corruption or escalating privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

NVD Source

Technical Analysis

CVE-2020-27815 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
Linux1 product(s)
linux kernel
netapp20 product(s)
h300s firmwareh300sh500s firmwareh500sh700s firmwareh700sh300e firmwareh300eh500e firmwareh500eh700e firmwareh700e+8
Source: NVD CPE · 23 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.openwall.com/lists/oss-security/2020/12/28/1
PATCHhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c61b3e4839007668360ed8b87d7da96d2e59fc6c
PATCHhttp://www.openwall.com/lists/oss-security/2020/12/28/1
PATCHhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c61b3e4839007668360ed8b87d7da96d2e59fc6c
ADVISORYhttp://www.openwall.com/lists/oss-security/2020/11/30/5
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20210702-0004/
ADVISORYhttps://www.debian.org/security/2021/dsa-4843
ADVISORYhttp://www.openwall.com/lists/oss-security/2020/11/30/5
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20210702-0004/
ADVISORYhttps://www.debian.org/security/2021/dsa-4843

All References (20)

→
http://www.openwall.com/lists/oss-security/2020/11/30/5Exploit · Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2020/12/28/1Exploit · Mailing List · Patch · Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1897668%2CIssue Tracking
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c61b3e4839007668360ed8b87d7da96d2e59fc6cPatch · Vendor Advisory
→
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing List · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20210702-0004/Third Party Advisory
→
https://www.debian.org/security/2021/dsa-4843Third Party Advisory
→
https://www.openwall.com/lists/oss-security/2020/11/30/5%2CMailing List
→
https://www.openwall.com/lists/oss-security/2020/12/28/1%2CMailing List
→
http://www.openwall.com/lists/oss-security/2020/11/30/5Exploit · Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2020/12/28/1Exploit · Mailing List · Patch · Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1897668%2CIssue Tracking
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c61b3e4839007668360ed8b87d7da96d2e59fc6cPatch · Vendor Advisory
→
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.htmlMailing List · Third Party Advisory

Quick Facts

CVE IDCVE-2020-27815
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-119
CISA KEVNo
Affected3 vendor(s)
PublishedMay 26, 2021

Related CVEs (CWE-119)

CVE-2012-2045
10.0
CVE-2012-1525
10.0
CVE-2012-1853
10.0
CVE-2012-2044
10.0
CVE-2012-1852
10.0
CVE-2012-2043
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-27815 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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