CVE-2021-41073

Advisory lineage Upstream: 0 Downstream: 9
Modified
Published: 19 Sept 2021, 16:02
Last modified:04 Aug 2024, 02:59

Vulnerability Summary

Overall Risk (default)
medium
32/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
1.68% LOW
2% probability +0.91%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

19 Sept 2021, 16:02
Published
Vulnerability first disclosed
04 Aug 2024, 02:59
Last Modified
Vulnerability information updated

Description

loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • v2.0•HIGH•Score: 7.2AV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 1.68%• Percentile: 83%

Techniques & Countermeasures

  • CWE-763•Release of Invalid Pointer or Reference

    The product attempts to return a memory resource to the system, but it calls the wrong release function or calls the appropriate release function incorrectly.

Affected Systems

  • debian•debian_linux

    10.0

  • fedoraproject•fedora

    33 | 34

  • linux•linux_kernel

    ≥ 5.10, < 5.10.68 | ≥ 5.11, < 5.14.7

  • netapp•cloud_backup

    na

  • netapp•h300e

    na

  • netapp•h300s_firmware

    na

  • netapp•h410c_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)