CVE-2020-11565
First published: Wed Apr 01 2020(Updated: )
** DISPUTED ** An issue was discovered in the Linux kernel through 5.6.2. mpol_parse_str in mm/mempolicy.c has a stack-based out-of-bounds write because an empty nodelist is mishandled during mount option parsing, aka CID-aa9f7d5172fa. NOTE: Someone in the security community disagrees that this is a vulnerability because the issue “is a bug in parsing mount options which can only be specified by a privileged user, so triggering the bug does not grant any powers not already held.”.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:3.10.0-1160.rt56.1131.el7 | 0:3.10.0-1160.rt56.1131.el7 |
| redhat/kernel-alt | <0:4.14.0-115.26.1.el7a | 0:4.14.0-115.26.1.el7a |
| redhat/kernel | <0:3.10.0-1160.el7 | 0:3.10.0-1160.el7 |
| redhat/kernel-rt | <0:4.18.0-240.rt7.54.el8 | 0:4.18.0-240.rt7.54.el8 |
| redhat/kernel | <0:4.18.0-240.el8 | 0:4.18.0-240.el8 |
| Linux Kernel | <=5.6.2 | |
| Ubuntu Linux | =14.04 | |
| Ubuntu Linux | =16.04 | |
| Ubuntu Linux | =18.04 | |
| Ubuntu Linux | =20.04 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.13-1 | |
| Ubuntu | =14.04 | |
| Ubuntu | =16.04 | |
| Ubuntu | =18.04 | |
| Ubuntu | =20.04 |
Remedy
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-11565 https://nvd.nist.gov/vuln/detail/CVE-2020-11565
- https://bugzilla.redhat.com/show_bug.cgi?id=1824918
- https://access.redhat.com/errata/RHSA-2020:4062
- https://access.redhat.com/errata/RHSA-2020:2854
- https://access.redhat.com/errata/RHSA-2020:4060
- https://access.redhat.com/errata/RHSA-2020:4609
- https://access.redhat.com/errata/RHSA-2020:4431
- https://access.redhat.com/security/cve/cve-2020-11565
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=aa9f7d5172fac9bf1f09e678c35e287a40a7b7dd
- https://github.com/torvalds/linux/commit/aa9f7d5172fac9bf1f09e678c35e287a40a7b7dd
- https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
- https://usn.ubuntu.com/4363-1/
- https://usn.ubuntu.com/4364-1/
- https://usn.ubuntu.com/4367-1/
- https://usn.ubuntu.com/4368-1/
- https://usn.ubuntu.com/4369-1/
- https://www.debian.org/security/2020/dsa-4667
- https://www.debian.org/security/2020/dsa-4698
- https://launchpad.net/bugs/cve/CVE-2020-11565
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1824919
- https://git.kernel.org/linus/aa9f7d5172fac9bf1f09e678c35e287a40a7b7dd
- https://security-tracker.debian.org/tracker/CVE-2020-11565
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11565
- https://nvd.nist.gov/vuln/detail/CVE-2020-11565
- https://ubuntu.com/security/CVE-2020-11565
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2020-11565?
CVE-2020-11565 has been reported as a disputed vulnerability with a potential for stack-based out-of-bounds writes.
How do I fix CVE-2020-11565?
To fix CVE-2020-11565, update your kernel to one that has removed the vulnerability, such as kernel version 5.10.223-1 or later.
Which Linux distributions are affected by CVE-2020-11565?
CVE-2020-11565 affects multiple Linux distributions, including several versions of Ubuntu and Red Hat.
What versions of the kernel are vulnerable to CVE-2020-11565?
The vulnerability CVE-2020-11565 affects Linux kernel versions up to and including 5.6.2.
Is CVE-2020-11565 exploitable?
Exploitation of CVE-2020-11565 may lead to arbitrary code execution due to stack corruption, although the exact risk may vary based on configurations.
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