CVE-2021-47358

HIGH
Published May 21, 2024 Modified Dec 26, 2024 CWE-416

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.

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CVSS v3.1 Score

7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/4dc56951a8d9d61d364d346c61a5f1d70b4f5e14 https://git.kernel.org/stable/c/64062fcaca8872f063ec9da011e7bf30470be33f https://git.kernel.org/stable/c/92b67aaafb7c449db9f0c3dcabc0ff967cb3a42d https://git.kernel.org/stable/c/92dc0b1f46e12cfabd28d709bb34f7a39431b44f https://git.kernel.org/stable/c/9872ff6fdce8b229f01993b611b5d1719cb70ff1 https://git.kernel.org/stable/c/a5cfd51f6348e8fd7531461366946039c29c7e69 https://git.kernel.org/stable/c/b9e697e60ce9890e9258a73eb061288e7d68e5e6 https://git.kernel.org/stable/c/4dc56951a8d9d61d364d346c61a5f1d70b4f5e14 https://git.kernel.org/stable/c/64062fcaca8872f063ec9da011e7bf30470be33f https://git.kernel.org/stable/c/92b67aaafb7c449db9f0c3dcabc0ff967cb3a42d https://git.kernel.org/stable/c/92dc0b1f46e12cfabd28d709bb34f7a39431b44f https://git.kernel.org/stable/c/9872ff6fdce8b229f01993b611b5d1719cb70ff1 https://git.kernel.org/stable/c/a5cfd51f6348e8fd7531461366946039c29c7e69 https://git.kernel.org/stable/c/b9e697e60ce9890e9258a73eb061288e7d68e5e6

Frequently Asked Questions

What is CVE-2021-47358? +
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. It has a CVSS v3.1 base score of 7.8 (HIGH).
How severe is CVE-2021-47358? +
CVE-2021-47358 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2021-47358? +
CVE-2021-47358 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2021-47358? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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