Vulnerability in Linux Kernel
CVE-2020-27825
A use-after-free flaw was found in kernel/trace/ring_buffer.c in Linux kernel (before 5.10-rc1). There was a race problem in trace_open and resize of cpu buffer running parallely on different cpus, may cause a denial of service problem (DOS). This flaw could even allow a local attacker with special user privilege to a kernel information leak threat.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (18.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Linux Kernel — versions 5.10
- NetApp Cloud Backup
- NetApp H410c
- NetApp H410c Firmware
- NetApp Solidfire Baseboard Management Controller
- NetApp Solidfire Baseboard Management Controller Firmware
- Debian Linux — versions 9.0, 10.0
- Red Hat Enterprise Linux — versions 7.0, 8.0
- Red Hat Enterprise Mrg — versions 2.0
- Kernel — versions before kernel 5.10-rc1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- www.debian.org/security/2021/dsa-4843 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/02/msg00018.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/03/msg00010.html (mailing-list, Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210521-0008/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-27825?
- CVE-2020-27825 is a medium-severity vulnerability in Linux Kernel, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.7/10. Published 2020-12-11.
- How severe is CVE-2020-27825?
- Medium severity. CVSS v3 base score is 5.7 out of 10.
- Is CVE-2020-27825 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.