What is CVE-2021-46979?

CVE-2021-46979 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 5.11.22, 5.12.5 and 5.13. CVE-2021-46979 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-46979?

CVE-2021-46979 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-2021-46979?

Yes, CVE-2021-46979 has been patched. Fixed versions include 5.11.22, 5.12.5 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-2021-46979 actively exploited?

CVE-2021-46979 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-46979

Medium

In the Linux kernel, the following vulnerability has been resolved: iio: core: fix ioctl handlers removal Currently ioctl handlers are removed twice. For the first time during iio_device_unregister() then later on inside iio_device_unregister_eventset() and iio_buffers_free_sysfs_and_mask(). Double free leads to kernel panic. Fix this by not touching ioctl handlers list directly but rather letting code responsible for registration call the matching cleanup routine itself.

Package Linux Kernel

Published 2024-02-28

Last modified 2024-12-31

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

Weakness type

CWE-415

CVE-2021-46979 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 5.11.22, 5.12.5, 5.13 and their respective stable series.

Affected from

≥ 5.11

Fixed in

✓ 5.11.22 5.11.x ✓ 5.12.5 5.12.x ✓ 5.13

References

3 total

Kernel Git
https://git.kernel.org/stable/c/11e1cae5da4096552f7c091476cbadbc0d1817da

Patch
Kernel Git
https://git.kernel.org/stable/c/901f84de0e16bde10a72d7eb2f2eb73fcde8fa1a

Patch
Kernel Git
https://git.kernel.org/stable/c/ab6c935ba3a04317632f3b8b68675bdbaf395303

Patch

Details

CVE ID CVE-2021-46979

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-02-28

Modified 2024-12-31

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-46979?

CVE-2021-46979 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 5.11.22, 5.12.5 and 5.13. CVE-2021-46979 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-46979?

CVE-2021-46979 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-2021-46979?

Yes. CVE-2021-46979 has been patched. Fixed versions include 5.11.22, 5.12.5 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-2021-46979 actively exploited?

No. CVE-2021-46979 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.