What is CVE-2021-47280?

CVE-2021-47280 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10. CVE-2021-47280 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47280?

CVE-2021-47280 has a CVSS score of 7.0 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-47280?

No patch is currently available for CVE-2021-47280. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-47280 actively exploited?

CVE-2021-47280 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-47280

High

In the Linux kernel, the following vulnerability has been resolved: drm: Fix use-after-free read in drm_getunique() There is a time-of-check-to-time-of-use error in drm_getunique() due to retrieving file_priv->master prior to locking the device's master mutex. An example can be seen in the crash report of the use-after-free error found by Syzbot: https://syzkaller.appspot.com/bug?id=148d2f1dfac64af52ffd27b661981a540724f803 In the report, the master pointer was used after being freed. This is because another process had acquired the device's master mutex in drm_setmaster_ioctl(), then overwrote fpriv->master in drm_new_set_master(). The old value of fpriv->master was subsequently freed before the mutex was unlocked. To fix this, we lock the device's master mutex before retrieving the pointer from from fpriv->master. This patch passes the Syzbot reproducer test.

Package Linux Kernel

Published 2024-05-21

Last modified 2024-12-24

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.0

out of 10

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-367

CVE-2021-47280 is classified as CWE-367

See CWE-367 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-47280 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/17dab9326ff263c62dab1dbac4492e2938a049e4
Patch
Kernel patch commit
https://git.kernel.org/stable/c/491d52e0078860b33b6c14f0a7ac74ca1b603bd6
Patch
Kernel patch commit
https://git.kernel.org/stable/c/7d233ba700ceb593905ea82b42dadb4ec8ef85e9
Patch

6 patch commits total View all on NVD

Details

CVE ID CVE-2021-47280

Severity High

CVSS score 7.0 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2024-12-24

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-47280?

CVE-2021-47280 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 . CVE-2021-47280 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47280?

CVE-2021-47280 has a CVSS score of 7.0 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-47280?

No patch is currently available for CVE-2021-47280. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-47280 actively exploited?

No — CVE-2021-47280 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.