CVE-2020-0466: Use After Free
First published: Mon Dec 07 2020(Updated: )
A flaw was found in the Linux kernel. A logic error in eventpoll.c can cause a use-after-free, leading to a local escalation of privilege with no additional execution privileges. User interaction is not needed for exploitation. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.
Credit: security@android.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <0:2.6.32-754.47.1.el6 | 0:2.6.32-754.47.1.el6 |
| redhat/kernel-rt | <0:3.10.0-1160.59.1.rt56.1200.el7 | 0:3.10.0-1160.59.1.rt56.1200.el7 |
| redhat/kernel | <0:3.10.0-1160.59.1.el7 | 0:3.10.0-1160.59.1.el7 |
| redhat/kernel | <0:3.10.0-514.97.1.el7 | 0:3.10.0-514.97.1.el7 |
| redhat/kernel | <0:3.10.0-693.99.1.el7 | 0:3.10.0-693.99.1.el7 |
| redhat/kernel | <0:3.10.0-957.88.1.el7 | 0:3.10.0-957.88.1.el7 |
| redhat/kernel | <0:3.10.0-1062.63.1.el7 | 0:3.10.0-1062.63.1.el7 |
| redhat/kernel-rt | <0:4.18.0-240.22.1.rt7.77.el8_3 | 0:4.18.0-240.22.1.rt7.77.el8_3 |
| redhat/kernel | <0:4.18.0-240.22.1.el8_3 | 0:4.18.0-240.22.1.el8_3 |
| redhat/kernel | <0:4.18.0-147.48.1.el8_1 | 0:4.18.0-147.48.1.el8_1 |
| redhat/kernel-rt | <0:4.18.0-193.56.1.rt13.106.el8_2 | 0:4.18.0-193.56.1.rt13.106.el8_2 |
| redhat/kernel | <0:4.18.0-193.56.1.el8_2 | 0:4.18.0-193.56.1.el8_2 |
| redhat/kernel-rt | <3.10.0-1160.57.1.rt56.1198.el7 | 3.10.0-1160.57.1.rt56.1198.el7 |
| Android | ||
| IBM Security Guardium | <=11.3 | |
| IBM InfoSphere Guardium z/OS | <=11.4 | |
| IBM InfoSphere Guardium z/OS | <=11.5 | |
| Android | ||
| debian/linux | 5.10.223-1 5.10.234-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.16-1 |
Remedy
Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update as soon as possible.
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-0466 https://nvd.nist.gov/vuln/detail/CVE-2020-0466
- https://bugzilla.redhat.com/show_bug.cgi?id=1920480
- https://access.redhat.com/errata/RHSA-2022:1417
- https://access.redhat.com/errata/RHSA-2022:0622
- https://access.redhat.com/errata/RHSA-2022:0592
- https://access.redhat.com/errata/RHSA-2022:0620
- https://access.redhat.com/errata/RHSA-2022:0529
- https://access.redhat.com/errata/RHSA-2022:1104
- https://access.redhat.com/errata/RHSA-2022:0531
- https://access.redhat.com/errata/RHSA-2022:0533
- https://access.redhat.com/errata/RHSA-2022:0712
- https://access.redhat.com/errata/RHSA-2022:0718
- https://access.redhat.com/errata/RHSA-2021:1081
- https://access.redhat.com/errata/RHSA-2021:1093
- https://access.redhat.com/errata/RHSA-2021:2099
- https://access.redhat.com/errata/RHSA-2021:2106
- https://access.redhat.com/errata/RHSA-2021:2190
- https://access.redhat.com/errata/RHSA-2021:2167
- https://access.redhat.com/errata/RHSA-2021:2185
- https://access.redhat.com/security/cve/cve-2020-0466
- https://source.android.com/security/bulletin/2020-12-01
- https://launchpad.net/bugs/cve/CVE-2020-0466
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a9ed4a6560b8562b7e2e2bed9527e88001f7b682
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=52c479697c9b73f628140dcdfcd39ea302d05482
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1920484
- https://exchange.xforce.ibmcloud.com/vulnerabilities/193397
- https://www.ibm.com/support/pages/node/6999317 (Advisory)
- https://android.googlesource.com/kernel/common/+/52c479697c9b
- https://android.googlesource.com/kernel/common/+/a9ed4a6560b8
- https://source.android.com/docs/security/bulletin/2020-12-01 (Advisory)
- https://git.kernel.org/linus/52c479697c9b73f628140dcdfcd39ea302d05482
- https://git.kernel.org/linus/a9ed4a6560b8562b7e2e2bed9527e88001f7b682
- https://security-tracker.debian.org/tracker/CVE-2020-0466
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0466
- https://nvd.nist.gov/vuln/detail/CVE-2020-0466
- https://ubuntu.com/security/CVE-2020-0466
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2020-0466?
CVE-2020-0466 is rated as a high-severity vulnerability due to its potential for local privilege escalation.
How do I fix CVE-2020-0466?
To remediate CVE-2020-0466, update to the latest kernel versions specified in the vendor advisories.
Who is affected by CVE-2020-0466?
CVE-2020-0466 primarily affects users running specific versions of the Linux kernel on Red Hat and Debian systems.
What type of vulnerability is CVE-2020-0466?
CVE-2020-0466 is a use-after-free vulnerability found in the Linux kernel's eventpoll component.
Is user interaction required to exploit CVE-2020-0466?
No, CVE-2020-0466 can be exploited without any user interaction.
- collector/redhat-cve
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/severity
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-0466
- agent/software-canonical-lookup
- agent/weakness
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/remedy
- agent/last-modified-date
- agent/trending
- agent/source
- agent/author
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- collector/nvd-index
- agent/software-canonical-lookup-request
- collector/ibm-support
- source/IBM
- agent/tags
- collector/android-source
- source/Android
- collector/nvd-cve
- source/NVD
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- package-manager/redhat
- vendor/google
- canonical/android
- vendor/ibm
- canonical/ibm security guardium
- version/ibm security guardium/11.3
- canonical/ibm infosphere guardium z/os
- version/ibm infosphere guardium z/os/11.4
- version/ibm infosphere guardium z/os/11.5
- package-manager/debian