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CVE-2021-47358

7.8 · 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…

Published May 21, 2024CWE-416EPSS 0.24%

Overview

CVE-2021-47358 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/4dc56951a8d9d61d364d346c61a5f1d70b4f5e14Refgit.kernel.org/stable/c/64062fcaca8872f063ec9da011e7bf30470be33fRefgit.kernel.org/stable/c/92b67aaafb7c449db9f0c3dcabc0ff967cb3a42dRefgit.kernel.org/stable/c/92dc0b1f46e12cfabd28d709bb34f7a39431b44fRefgit.kernel.org/stable/c/9872ff6fdce8b229f01993b611b5d1719cb70ff1Refgit.kernel.org/stable/c/a5cfd51f6348e8fd7531461366946039c29c7e69Refgit.kernel.org/stable/c/b9e697e60ce9890e9258a73eb061288e7d68e5e6Refgit.kernel.org/stable/c/4dc56951a8d9d61d364d346c61a5f1d70b4f5e14Refgit.kernel.org/stable/c/64062fcaca8872f063ec9da011e7bf30470be33fRefgit.kernel.org/stable/c/92b67aaafb7c449db9f0c3dcabc0ff967cb3a42d

How CyberStrike helps

Frequently asked questions

What is CVE-2021-47358?

CVE-2021-47358 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-47358?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-47358?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-47358?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-47358 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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