CVE-2021-47301

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

Description

In the Linux kernel, the following vulnerability has been resolved: igb: Fix use-after-free error during reset Cleans the next descriptor to watch (next_to_watch) when cleaning the TX ring. Failure to do so can cause invalid memory accesses. If igb_poll() runs while the controller is reset this can lead to the driver try to free a skb that was already freed. (The crash is harder to reproduce with the igb driver, but the same potential problem exists as the code is identical to igc)

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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

References

Advisories & Patches

https://git.kernel.org/stable/c/7b292608db23ccbbfbfa50cdb155d01725d7a52e https://git.kernel.org/stable/c/88e0720133d42d34851c8721cf5f289a50a8710f https://git.kernel.org/stable/c/8e24c12f2ff6d32fd9f057382f08e748ec97194c https://git.kernel.org/stable/c/d3ccb18ed5ac3283c7b31ecc685b499e580d5492 https://git.kernel.org/stable/c/d7367f781e5a9ca5df9082b15b272b55e76931f8 https://git.kernel.org/stable/c/f153664d8e70c11d0371341613651e1130e20240 https://git.kernel.org/stable/c/7b292608db23ccbbfbfa50cdb155d01725d7a52e https://git.kernel.org/stable/c/88e0720133d42d34851c8721cf5f289a50a8710f https://git.kernel.org/stable/c/8e24c12f2ff6d32fd9f057382f08e748ec97194c https://git.kernel.org/stable/c/d3ccb18ed5ac3283c7b31ecc685b499e580d5492 https://git.kernel.org/stable/c/d7367f781e5a9ca5df9082b15b272b55e76931f8 https://git.kernel.org/stable/c/f153664d8e70c11d0371341613651e1130e20240

Frequently Asked Questions

What is CVE-2021-47301? +
In the Linux kernel, the following vulnerability has been resolved: igb: Fix use-after-free error during reset Cleans the next descriptor to watch (next_to_watch) when cleaning the TX ring. Failure to do so can cause invalid memory accesses. If igb_poll() runs while the controller is reset this can lead to the driver try to free a skb that was already freed. (The crash is harder to reproduce with the igb driver, but the same potential problem exists as the code is identical to igc) It has a CVSS v3.1 base score of 7.8 (HIGH).
How severe is CVE-2021-47301? +
CVE-2021-47301 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-2021-47301? +
CVE-2021-47301 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-2021-47301? +
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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