CVE-2021-33574

Advisory lineage Upstream: 0 Downstream: 13
Modified
Published: 25 May 2021, 00:00
Last modified:03 Aug 2024, 23:50

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.8 CRITICAL
v3.1 (nvd)
EPSS Score
0.13% LOW
0% probability -0.01%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

25 May 2021, 00:00
Published
Vulnerability first disclosed
03 Aug 2024, 23:50
Last Modified
Vulnerability information updated

Description

The mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.

CVSS Metrics

  • v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • v2.0•HIGH•Score: 7.5AV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.13%• Percentile: 32%

Techniques & Countermeasures

  • CWE-416•Use After Free

    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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • debian•debian_linux

    10.0

  • fedoraproject•fedora

    33 | 34

  • gnu•glibc

    2.3.2 | 2.33

  • netapp•cloud_backup

    na

  • netapp•e-series_santricity_os_controller

    ≥ 11.0, ≤ 11.70.1

  • netapp•h300e

    na

  • netapp•h300s_firmware

    na

  • netapp•h410s_firmware

    na

  • netapp•h500e

    na

  • netapp•h500s_firmware

    na

  • netapp•h700e

    na

  • netapp•h700s_firmware

    na

  • netapp•solidfire_baseboard_management_controller_firmware

    na

References (7)