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ubuntucveUbuntu.comUB:CVE-2021-41073
HistorySep 19, 2021 - 12:00 a.m.

CVE-2021-41073

2021-09-1900:00:00
ubuntu.com
ubuntu.com
35
cve-2021-41073
loop_rw_iter
fs/io_uring.c
ioring_op_provide_buffers
/proc/<pid>/maps
kernel buffer

CVSS2

7.2

Attack Vector

LOCAL

Attack 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

CVSS3

7.8

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

EPSS

0

Percentile

5.1%

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
ubuntu21.04noarchlinux-gcp< 5.11.0-1020.22UNKNOWN
ubuntu20.04noarchlinux-gcp-5.11< 5.11.0-1020.22~20.04.1UNKNOWN
ubuntu20.04noarchlinux-hwe-5.11< 5.11.0-37.41~20.04.2UNKNOWN
ubuntu21.04noarchlinux-kvm< 5.11.0-1017.18UNKNOWN
ubuntu20.04noarchlinux-oem-5.10< 5.10.0-1049.51UNKNOWN
Rows per page:
1-10 of 161

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CVSS2

7.2

Attack Vector

LOCAL

Attack 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

CVSS3

7.8

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

EPSS

0

Percentile

5.1%

JSON
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