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 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.

• CWE-119
• CWE-787

• 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
• 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

Published

May 26, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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