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 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 |
| Google Android | ||
| redhat/kernel-rt | <3.10.0-1160.57.1.rt56.1198.el7 | 3.10.0-1160.57.1.rt56.1198.el7 |
| IBM BM Security Guardium | <=11.3 | |
| IBM Security Guardium | <=11.4 | |
| IBM Security Guardium | <=11.5 | |
| Google Android | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.5-1 6.11.7-1 |
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.
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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)
- collector/redhat-cve
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/author
- agent/remedy
- agent/severity
- agent/description
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-0466
- agent/software-canonical-lookup
- agent/weakness
- collector/nvd-cve
- source/NVD
- agent/references
- collector/ibm-support
- source/IBM
- collector/mitre-cve
- source/MITRE
- agent/event
- agent/tags
- collector/android-source
- source/Android
- agent/last-modified-date
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/usn-cve
- source/Ubuntu
- package-manager/redhat
- vendor/google
- canonical/google android
- vendor/ibm
- canonical/ibm bm security guardium
- version/ibm bm security guardium/11.3
- canonical/ibm security guardium
- version/ibm security guardium/11.4
- version/ibm security guardium/11.5
- package-manager/debian