What is CVE-2021-47339?

CVE-2021-47339 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2021-47339 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47339?

CVE-2021-47339 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-2021-47339?

No patch is currently available for CVE-2021-47339. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-47339 actively exploited?

CVE-2021-47339 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47339

Medium

In the Linux kernel, the following vulnerability has been resolved: media: v4l2-core: explicitly clear ioctl input data As seen from a recent syzbot bug report, mistakes in the compat ioctl implementation can lead to uninitialized kernel stack data getting used as input for driver ioctl handlers. The reported bug is now fixed, but it's possible that other related bugs are still present or get added in the future. As the drivers need to check user input already, the possible impact is fairly low, but it might still cause an information leak. To be on the safe side, always clear the entire ioctl buffer before calling the conversion handler functions that are meant to initialize them.

Package Linux Kernel

Published 2024-05-21

Last modified 2025-03-06

CVSS version 3.1

Patch available

Awaiting data

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-908

CVE-2021-47339 is classified as CWE-908

See CWE-908 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-47339 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/7b53cca764f9b291b7907fcd39d9e66ad728ee0b
Patch
Kernel patch commit
https://git.kernel.org/stable/c/bfb48b54db25c3b4ef4bef5e0691464ebc4aa335
Patch
Kernel patch commit
https://git.kernel.org/stable/c/dc02c0b2bd6096f2f3ce63e1fc317aeda05f74d8
Patch

Details

CVE ID CVE-2021-47339

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-03-06

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-47339?

CVE-2021-47339 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2021-47339 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47339?

CVE-2021-47339 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-2021-47339?

No patch is currently available for CVE-2021-47339. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-47339 actively exploited?

No — CVE-2021-47339 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.