UBUNTU-CVE-2021-41073

Advisory lineage Upstream: 1 Downstream: 4
Upstream
CVE-2021-41073
Published: 19 Sept 2021, 17:15
Last modified:04 Feb 2026, 02:15

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

19 Sept 2021, 17:15
Published
Vulnerability first disclosed
04 Feb 2026, 02:15
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

Affected Systems

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    < 5.11.0-1019.20~20.04.1

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-azure

    all

  • ubuntu•linux-azure-5.11

    < 5.11.0-1017.18~20.04.1

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-gcp

    all

  • ubuntu•linux-gcp-5.11

    < 5.11.0-1020.22~20.04.1

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.8

    all

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gke-4.15

    all

  • ubuntu•linux-hwe

    all

  • ubuntu•linux-hwe-5.11

    < 5.11.0-37.41~20.04.2

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-5.13

    all

  • ubuntu•linux-oem

    all

  • ubuntu•linux-oem-5.10

    < 5.10.0-1049.51

  • ubuntu•linux-oem-5.13

    < 5.13.0-1014.18

  • ubuntu•linux-oem-5.6

    all

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.11

    < 5.11.0-1019.20~20.04.1

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-oracle-5.8

    all

  • ubuntu•linux-raspi2

    all

  • ubuntu•linux-riscv

    all

  • ubuntu•linux-riscv-5.11

    < 5.11.0-1020.21~20.04.1

  • ubuntu•linux-riscv-5.8

    all

References (8)