A memory out of bound read flaw was found in the Linux kernel's ext3/ext4 file system, in the way it accesses directory with broken indexing. This flaw allows a local user to crash the system if such directory exists.
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1854089]
Acknowledgments: Name: Jay Shin (Red Hat)
Mitigation: If any directories of the partition (or image) broken, the command "e2fsck -Df .../partition-name" fixes it.
Upstream patch: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5872331b3d91820e14716632ebb56b1399b34fe1
External References: https://lore.kernel.org/linux-ext4/f53e246b-647c-64bb-16ec-135383c70ad7@redhat.com/T/#u https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5872331b3d91820e14716632ebb56b1399b34fe1
This was fixed for Fedora with the 5.7.18 stable kernel updates
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2020:5437 https://access.redhat.com/errata/RHSA-2020:5437
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2020:5441 https://access.redhat.com/errata/RHSA-2020:5441
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2020-14314
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:1578 https://access.redhat.com/errata/RHSA-2021:1578
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:1739 https://access.redhat.com/errata/RHSA-2021:1739