CVE-2020-27820: Use After Free
First published: Tue Nov 03 2020(Updated: )
A vulnerability was found in kernel, where a use-after-frees in nouveau's postclose() handler could happen if removing device (that is not common to remove video card physically without power-off, but same happens if "unbind" the driver).
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-372.9.1.rt7.166.el8 | 0:4.18.0-372.9.1.rt7.166.el8 |
| redhat/kernel | <0:4.18.0-372.9.1.el8 | 0:4.18.0-372.9.1.el8 |
| Linux Linux kernel | ||
| Fedoraproject Fedora | =33 | |
| Linux Linux kernel | >2.6.12<5.4.162 | |
| Linux Linux kernel | >5.5<5.10.82 | |
| Linux Linux kernel | >5.11<5.15.5 | |
| Linux Linux kernel | =2.6.12 | |
| Linux Linux kernel | =2.6.12-rc2 | |
| Linux Linux kernel | =2.6.12-rc3 | |
| Linux Linux kernel | =2.6.12-rc4 | |
| Linux Linux kernel | =2.6.12-rc5 | |
| Linux Linux kernel | =2.6.12-rc6 | |
| Oracle Communications Cloud Native Core Binding Support Function | =22.1.3 | |
| Oracle Communications Cloud Native Core Network Exposure Function | =22.1.1 | |
| Oracle Communications Cloud Native Core Policy | =22.2.0 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
Remedy
To mitigate this issue, prevent the module nouveau from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.
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-2020-27820 https://nvd.nist.gov/vuln/detail/CVE-2020-27820 https://lore.kernel.org/dri-devel/20201103194912.184413-2-jcline@redhat.com/ https://lore.kernel.org/dri-devel/20201103194912.184413-3-jcline@redhat.com/ https://lore.kernel.org/dri-devel/20201103194912.184413-4-jcline@redhat.com/
- https://bugzilla.redhat.com/show_bug.cgi?id=1901726
- https://access.redhat.com/errata/RHSA-2022:1975
- https://access.redhat.com/errata/RHSA-2022:1988
- https://access.redhat.com/security/cve/cve-2020-27820
- https://lore.kernel.org/dri-devel/20201103194912.184413-2-jcline%40redhat.com/
- https://lore.kernel.org/dri-devel/20201103194912.184413-3-jcline%40redhat.com/
- https://lore.kernel.org/dri-devel/20201103194912.184413-4-jcline%40redhat.com/
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://launchpad.net/bugs/cve/CVE-2020-27820
- https://access.redhat.com/solutions/41278
- https://lore.kernel.org/dri-devel/20201103194912.184413-2-jcline@redhat.com/
- https://lore.kernel.org/dri-devel/20201103194912.184413-3-jcline@redhat.com/
- https://lore.kernel.org/dri-devel/20201103194912.184413-4-jcline@redhat.com/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1904039
- https://security-tracker.debian.org/tracker/CVE-2020-27820
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27820
- https://nvd.nist.gov/vuln/detail/CVE-2020-27820
- https://ubuntu.com/security/CVE-2020-27820
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-27820
- agent/severity
- agent/weakness
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/author
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/remedy
- agent/tags
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- collector/nvd-cve
- agent/last-modified-date
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/trending
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/33
- version/linux linux kernel/2.6.12
- version/linux linux kernel/2.6.12-rc2
- version/linux linux kernel/2.6.12-rc3
- version/linux linux kernel/2.6.12-rc4
- version/linux linux kernel/2.6.12-rc5
- version/linux linux kernel/2.6.12-rc6
- vendor/oracle
- canonical/oracle communications cloud native core binding support function
- version/oracle communications cloud native core binding support function/22.1.3
- canonical/oracle communications cloud native core network exposure function
- version/oracle communications cloud native core network exposure function/22.1.1
- canonical/oracle communications cloud native core policy
- version/oracle communications cloud native core policy/22.2.0
- package-manager/debian