CVE-2020-14356: Use After Free
First published: Sun May 31 2020(Updated: )
A flaw null pointer dereference in the Linux kernel cgroupv2 subsystem in versions before 5.7.10 was found in the way when reboot the system. A local user could use this flaw to crash the system or escalate their privileges on the system.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-305.rt7.72.el8 | 0:4.18.0-305.rt7.72.el8 |
| redhat/kernel | <0:4.18.0-305.el8 | 0:4.18.0-305.el8 |
| redhat/kernel | <5.7.10 | 5.7.10 |
| Linux Kernel | >=4.5<4.9.231 | |
| Linux Kernel | >=4.10<4.14.189 | |
| Linux Kernel | >=4.15<4.19.134 | |
| Linux Kernel | >=4.20<5.4.53 | |
| Linux Kernel | >=5.5<5.7.10 | |
| Red Hat Enterprise Linux | =8.0 | |
| openSUSE | =15.1 | |
| openSUSE | =15.2 | |
| Debian GNU/Linux | =9.0 | |
| Ubuntu Linux | =14.04 | |
| Ubuntu Linux | =16.04 | |
| Ubuntu Linux | =18.04 | |
| Ubuntu Linux | =20.04 | |
| NetApp Active IQ Unified Manager for VMware vSphere | ||
| netapp cloud backup | ||
| netapp hci management node | ||
| netapp solidfire | ||
| All of | ||
| netapp solidfire baseboard management controller firmware | ||
| netapp solidfire baseboard management controller | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 | |
| Debian | =9.0 | |
| Ubuntu | =14.04 | |
| Ubuntu | =16.04 | |
| Ubuntu | =18.04 | |
| Ubuntu | =20.04 | |
| netapp solidfire baseboard management controller firmware | ||
| netapp solidfire baseboard management controller |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-14356 https://nvd.nist.gov/vuln/detail/CVE-2020-14356
- https://bugzilla.redhat.com/show_bug.cgi?id=1868453
- https://access.redhat.com/errata/RHSA-2021:1739
- https://access.redhat.com/errata/RHSA-2021:1578
- https://access.redhat.com/security/cve/cve-2020-14356
- https://bugzilla.kernel.org/show_bug.cgi?id=208003
- https://lore.kernel.org/netdev/CAM_iQpUKQJrj8wE+Qa8NGR3P0L+5Uz=qo-O5+k_P60HzTde6aw%40mail.gmail.com/t/
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00047.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00007.html
- https://security.netapp.com/advisory/ntap-20200904-0002/
- https://usn.ubuntu.com/4484-1/
- https://usn.ubuntu.com/4483-1/
- https://usn.ubuntu.com/4526-1/
- https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
- https://launchpad.net/bugs/cve/CVE-2020-14356
- https://github.com/torvalds/linux/commit/94886c86e833dbc8995202b6c6aaff592b7abd24
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1868479
- https://git.kernel.org/linus/ad0f75e5f57ccbceec13274e1e242f2b5a6397ed
- https://security-tracker.debian.org/tracker/CVE-2020-14356
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14356
- https://nvd.nist.gov/vuln/detail/CVE-2020-14356
- https://ubuntu.com/security/CVE-2020-14356
Frequently Asked Questions
What is the severity of CVE-2020-14356?
CVE-2020-14356 has been classified as a medium severity vulnerability due to potential system crashes or privilege escalation.
How do I fix CVE-2020-14356?
To fix CVE-2020-14356, upgrade to kernel version 5.7.10 or later, or apply the patched versions specified for your distribution.
What happens if I am affected by CVE-2020-14356?
If affected by CVE-2020-14356, a local user could crash the system or escalate their privileges, leading to potential unauthorized access.
Which Linux kernel versions are affected by CVE-2020-14356?
CVE-2020-14356 affects Linux kernel versions prior to 5.7.10, including multiple versions from 4.5 onward.
Is CVE-2020-14356 specific to any particular Linux distribution?
CVE-2020-14356 impacts various distributions, including Red Hat Enterprise Linux, Ubuntu, and Debian among others.
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