What is CVE-2021-47123?

CVE-2021-47123 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 5.11 onward and patched in 5.12.10 and 5.13. CVE-2021-47123 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47123?

CVE-2021-47123 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-47123?

Yes, CVE-2021-47123 has been patched. Fixed versions include 5.12.10 and 5.13. If you are running Linux kernel 5.11 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47123 actively exploited?

CVE-2021-47123 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47123

High

In the Linux kernel, the following vulnerability has been resolved: io_uring: fix ltout double free on completion race Always remove linked timeout on io_link_timeout_fn() from the master request link list, otherwise we may get use-after-free when first io_link_timeout_fn() puts linked timeout in the fail path, and then will be found and put on master's free.

Package Linux Kernel

Published 2024-03-15

Last modified 2025-01-14

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-415

CVE-2021-47123 is classified as CWE-415

See CWE-415 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 5.11 and later are affected. Fixed in 5.12.10, 5.13 and their respective stable series.

Affected from

≥ 5.11

Fixed in

✓ 5.12.10 5.12.x ✓ 5.13

References

2 total

Kernel Git
https://git.kernel.org/stable/c/1f64f5e903b9d1d157875721e02adadc9d6f0a5d

Patch
Kernel Git
https://git.kernel.org/stable/c/447c19f3b5074409c794b350b10306e1da1ef4ba

Patch

Details

CVE ID CVE-2021-47123

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-03-15

Modified 2025-01-14

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47123?

CVE-2021-47123 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 5.11 onward and has been patched in 5.12.10 and 5.13. CVE-2021-47123 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47123?

CVE-2021-47123 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-47123?

Yes. CVE-2021-47123 has been patched. Fixed versions include 5.12.10 and 5.13. If you are running Linux kernel 5.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47123 actively exploited?

No. CVE-2021-47123 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.