Vulnerability Details : CVE-2021-47088

In the Linux kernel, the following vulnerability has been resolved: mm/damon/dbgfs: protect targets destructions with kdamond_lock DAMON debugfs interface iterates current monitoring targets in 'dbgfs_target_ids_read()' while holding the corresponding 'kdamond_lock'. However, it also destructs the monitoring targets in 'dbgfs_before_terminate()' without holding the lock. This can result in a use_after_free bug. This commit avoids the race by protecting the destruction with the corresponding 'kdamond_lock'.
Published 2024-03-04 18:15:08
Updated 2025-01-16 17:20:46
Source Linux
View at NVD,   CVE.org

Products affected by CVE-2021-47088

Exploit prediction scoring system (EPSS) score for CVE-2021-47088

EPSS FAQ
0.06%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 15 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-47088

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.0
 HIGH CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
1.0
5.9
 NIST 2025-01-16

CWE ids for CVE-2021-47088

  • 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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: nvd@nist.gov (Primary)

References for CVE-2021-47088

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