Bug 1897668 (CVE-2020-27815) - CVE-2020-27815 kernel: Array index out of bounds access when setting extended attributes on journaling filesystems.
Summary: CVE-2020-27815 kernel: Array index out of bounds access when setting extended...
Alias: CVE-2020-27815
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1902831 1911186
Blocks: 1897669 1939829
TreeView+ depends on / blocked
Reported: 2020-11-13 17:57 UTC by Pedro Sampaio
Modified: 2021-03-17 07:16 UTC (History)
48 users (show)

Fixed In Version:
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Doc Text:
A flaw was found in the JFS filesystem code. This flaw 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.
Clone Of:
Last Closed: 2020-11-26 16:36:37 UTC

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Description Pedro Sampaio 2020-11-13 17:57:19 UTC
A flaw was found in the Linux kernels implementation of extended attributes while working on a journaled filesystem.  

An attacker with local access with permissions to modify extended attributes on a local filesystem can possibly crash the system.

Comment 7 Guilherme de Almeida Suckevicz 2020-11-30 19:25:08 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1902831]

Comment 9 Justin M. Forbes 2021-03-04 22:03:28 UTC
This was fixed for Fedora with the 5.10.4 stable kernel updates.

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