Home/CVE/A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the ability to set ex
CVE

CVE-2020-27815

A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the ability to set ex

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.

HIGH · CVSS 7.8 EPSS 0.00198
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-787Out-of-bounds Write
▤

Affected Products & Versions

17
linux kernel> 4.4.249
linux kernel>= 4.5 and < 4.9.249
linux kernel>= 4.10 and < 4.14.213
linux kernel>= 4.15 and < 4.19.164
linux kernel>= 4.20 and < 5.4.86
linux kernel>= 5.5 and < 5.10.4
debian linuxall versions
netapp h300s firmwareall versions
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 May 2021 · 01:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

22
msrcCVE-2020-27815
suse-csafopenSUSE-SU-2021:1975-1
suse-csafopenSUSE-SU-2021:1977-1
suse-csafSUSE-SU-2021:1975-1
suse-csafSUSE-SU-2021:1977-1
🔗

References & Sources

10
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2020/11/30/5ExploitMailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2020/12/28/1ExploitMailing ListPatchThird 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=c61b3e4839007668360ed8b87d7da96d2e59fc6cPatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing ListThird Party Advisory
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