CVE-2021-41073

2021-09-1900:00:00

ubuntu.com

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.0004 Low

EPSS

Percentile

5.3%

JSON

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.

OSVersionArchitecturePackageVersionFilename
ubuntu21.04noarchlinux< 5.11.0-37.41UNKNOWN
ubuntu21.04noarchlinux-aws< 5.11.0-1019.20UNKNOWN
ubuntu20.04noarchlinux-aws-5.11< 5.11.0-1019.20~20.04.1UNKNOWN
ubuntu21.04noarchlinux-azure< 5.11.0-1017.18UNKNOWN
ubuntu20.04noarchlinux-azure-5.11< 5.11.0-1017.18~20.04.1UNKNOWN
ubuntu22.04noarchlinux-azure-fde< anyUNKNOWN
ubuntu21.04noarchlinux-gcp< 5.11.0-1020.22UNKNOWN
ubuntu20.04noarchlinux-gcp-5.11< 5.11.0-1020.22~20.04.1UNKNOWN
ubuntu22.04noarchlinux-gkeop< anyUNKNOWN
ubuntu20.04noarchlinux-gkeop-5.15< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	21.04	noarch	linux	< 5.11.0-37.41	UNKNOWN
ubuntu	21.04	noarch	linux-aws	< 5.11.0-1019.20	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.11	< 5.11.0-1019.20~20.04.1	UNKNOWN
ubuntu	21.04	noarch	linux-azure	< 5.11.0-1017.18	UNKNOWN
ubuntu	20.04	noarch	linux-azure-5.11	< 5.11.0-1017.18~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-azure-fde	< any	UNKNOWN
ubuntu	21.04	noarch	linux-gcp	< 5.11.0-1020.22	UNKNOWN
ubuntu	20.04	noarch	linux-gcp-5.11	< 5.11.0-1020.22~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-gkeop	< any	UNKNOWN
ubuntu	20.04	noarch	linux-gkeop-5.15	< any	UNKNOWN