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.
Published 2020-12-11 19:15:13
Updated 2022-09-02 15:34:13
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: Memory CorruptionDenial of service

Products affected by CVE-2020-27825

Exploit prediction scoring system (EPSS) score for CVE-2020-27825

0.04%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-27825

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.4
MEDIUM AV:L/AC:M/Au:N/C:P/I:N/A:C
3.4
7.8
NIST
5.7
MEDIUM CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H
0.5
5.2
NIST

CWE ids for CVE-2020-27825

  • The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.
    Assigned by: secalert@redhat.com (Primary)
  • The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
    Assigned by: secalert@redhat.com (Primary)

References for CVE-2020-27825

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