What is CVE-2021-47358?

CVE-2021-47358 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 4.9 onward and patched in 4.9.285, 4.14.249, 4.19.209 and others. CVE-2021-47358 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-47358?

CVE-2021-47358 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-2021-47358?

Yes, CVE-2021-47358 has been patched. Fixed versions include 4.9.285, 4.14.249, 4.19.209 and others. If you are running Linux kernel 4.9 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2021-47358 actively exploited?

CVE-2021-47358 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2021-47358

High

In the Linux kernel, the following vulnerability has been resolved: staging: greybus: uart: fix tty use after free User space can hold a tty open indefinitely and tty drivers must not release the underlying structures until the last user is gone. Switch to using the tty-port reference counter to manage the life time of the greybus tty state to avoid use after free after a disconnect.

Package Linux Kernel

Published 2024-05-21

Last modified 2024-12-26

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-416

CVE-2021-47358 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 4.9 and later are affected. Fixed in 4.9.285, 4.14.249, 4.19.209, 5.4.150, 5.10.70, 5.14.9, 5.15 and their respective stable series.

Affected from

≥ 4.9

Fixed in

✓ 4.9.285 4.9.x ✓ 4.14.249 4.14.x ✓ 4.19.209 4.19.x ✓ 5.4.150 5.4.x ✓ 5.10.70 5.10.x ✓ 5.14.9 5.14.x ✓ 5.15

References

7 total

Kernel Git
https://git.kernel.org/stable/c/4dc56951a8d9d61d364d346c61a5f1d70b4f5e14

Patch
Kernel Git
https://git.kernel.org/stable/c/64062fcaca8872f063ec9da011e7bf30470be33f

Patch
Kernel Git
https://git.kernel.org/stable/c/92b67aaafb7c449db9f0c3dcabc0ff967cb3a42d

Patch
Kernel Git
https://git.kernel.org/stable/c/92dc0b1f46e12cfabd28d709bb34f7a39431b44f

Patch
Kernel Git
https://git.kernel.org/stable/c/9872ff6fdce8b229f01993b611b5d1719cb70ff1

Patch

Showing 5 of 7 references View all on NVD

Details

CVE ID CVE-2021-47358

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2024-12-26

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2021-47358?

CVE-2021-47358 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 4.9 onward and has been patched in 4.9.285, 4.14.249, 4.19.209 and others. CVE-2021-47358 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-47358?

CVE-2021-47358 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-2021-47358?

Yes. CVE-2021-47358 has been patched. Fixed versions include 4.9.285, 4.14.249, 4.19.209 and others. If you are running Linux kernel 4.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2021-47358 actively exploited?

No. CVE-2021-47358 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.