What is CVE-2021-46945?

CVE-2021-46945 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.11 onward and patched in 5.11.20, 5.12.3 and 5.13. CVE-2021-46945 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-46945?

CVE-2021-46945 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2021-46945?

Yes, CVE-2021-46945 has been patched. Fixed versions include 5.11.20, 5.12.3 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-2021-46945 actively exploited?

CVE-2021-46945 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-46945

Medium

In the Linux kernel, the following vulnerability has been resolved: ext4: always panic when errors=panic is specified Before commit 014c9caa29d3 ("ext4: make ext4_abort() use __ext4_error()"), the following series of commands would trigger a panic: 1. mount /dev/sda -o ro,errors=panic test 2. mount /dev/sda -o remount,abort test After commit 014c9caa29d3, remounting a file system using the test mount option "abort" will no longer trigger a panic. This commit will restore the behaviour immediately before commit 014c9caa29d3. (However, note that the Linux kernel's behavior has not been consistent; some previous kernel versions, including 5.4 and 4.19 similarly did not panic after using the mount option "abort".) This also makes a change to long-standing behaviour; namely, the following series commands will now cause a panic, when previously it did not: 1. mount /dev/sda -o ro,errors=panic test 2. echo test > /sys/fs/ext4/sda/trigger_fs_error However, this makes ext4's behaviour much more consistent, so this is a good thing.

Package Linux Kernel

Published 2024-02-27

Last modified 2024-11-21

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 5.11 and later are affected. Fixed in 5.11.20, 5.12.3, 5.13 and their respective stable series.

Affected from

≥ 5.11

Fixed in

✓ 5.11.20 5.11.x ✓ 5.12.3 5.12.x ✓ 5.13

References

3 total

Kernel Git
https://git.kernel.org/stable/c/1e9ea8f4637026b8e965128953f2da061ccae9c4

Patch
Kernel Git
https://git.kernel.org/stable/c/64e1eebe2131183174f4fbb6b1491355f96c6cde

Patch
Kernel Git
https://git.kernel.org/stable/c/ac2f7ca51b0929461ea49918f27c11b680f28995

Patch

Details

CVE ID CVE-2021-46945

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-02-27

Modified 2024-11-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-46945?

CVE-2021-46945 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.11 onward and has been patched in 5.11.20, 5.12.3 and 5.13. CVE-2021-46945 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-46945?

CVE-2021-46945 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2021-46945?

Yes. CVE-2021-46945 has been patched. Fixed versions include 5.11.20, 5.12.3 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-2021-46945 actively exploited?

No. CVE-2021-46945 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.