CVE-2020-27825: Use After Free
First published: Mon Dec 07 2020(Updated: )
A flaw was found in the Linux Kernel. A use-after-free vulnerability was discovered in the ftrace ring buffer resizing logic due to a race condition. Reference and upstream patch: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bbeb97464eefc65f506084fd9f18f21653e01137">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bbeb97464eefc65f506084fd9f18f21653e01137</a>
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 4.19.249-2 4.19.289-2 5.10.197-1 5.10.191-1 6.1.66-1 6.1.69-1 6.5.13-1 6.6.8-1 | |
| redhat/kernel | <5.10 | 5.10 |
| Linux Kernel | =5.10-rc1 | |
| Red Hat Enterprise Linux | =7.0 | |
| Red Hat Enterprise Linux | =8.0 | |
| redhat enterprise MRG | =2.0 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| netapp cloud backup | ||
| netapp solidfire baseboard management controller firmware | ||
| netapp solidfire baseboard management controller | ||
| netapp h410c firmware | ||
| netapp h410c |
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://bugzilla.redhat.com/show_bug.cgi?id=1905155
- https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
- https://security.netapp.com/advisory/ntap-20210521-0008/
- https://www.debian.org/security/2021/dsa-4843
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bbeb97464eefc65f506084fd9f18f21653e01137
- https://git.kernel.org/linus/bbeb97464eefc65f506084fd9f18f21653e01137
- https://security-tracker.debian.org/tracker/CVE-2020-27825
Frequently Asked Questions
What is CVE-2020-27825?
CVE-2020-27825 is a use-after-free flaw found in kernel/trace/ring_buffer.c in the Linux kernel (before 5.10-rc1).
What is the impact of CVE-2020-27825?
CVE-2020-27825 can cause a denial of service (DOS) and may allow a local attacker to execute arbitrary code.
How does CVE-2020-27825 occur?
CVE-2020-27825 occurs due to a race condition in trace_open and resize of cpu buffer running simultaneously on different CPUs.
Which versions of Linux kernel are affected by CVE-2020-27825?
Versions before 5.10-rc1 of the Linux kernel are affected by CVE-2020-27825.
How can I fix CVE-2020-27825?
To fix CVE-2020-27825, update your Linux kernel to version 5.10-rc1 or later.
- collector/security-tracker-debian
- agent/type
- agent/first-publish-date
- agent/references
- collector/mitre-cve
- source/MITRE
- agent/remedy
- agent/severity
- agent/author
- agent/last-modified-date
- agent/description
- agent/event
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2020-27825
- agent/software-canonical-lookup
- agent/trending
- agent/weakness
- agent/source
- agent/tags
- agent/softwarecombine
- collector/nvd-index
- agent/software-canonical-lookup-request
- package-manager/debian
- package-manager/redhat
- vendor/linux
- canonical/linux kernel
- version/linux kernel/5.10-rc1
- vendor/redhat
- canonical/red hat enterprise linux
- version/red hat enterprise linux/7.0
- version/red hat enterprise linux/8.0
- canonical/redhat enterprise mrg
- version/redhat enterprise mrg/2.0
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0
- version/debian debian linux/10.0
- vendor/netapp
- canonical/netapp cloud backup
- canonical/netapp solidfire baseboard management controller firmware
- canonical/netapp solidfire baseboard management controller
- canonical/netapp h410c firmware
- canonical/netapp h410c