CVE-2021-46991

HIGH
Published Feb 28, 2024 Modified Dec 6, 2024 CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: i40e: Fix use-after-free in i40e_client_subtask() Currently the call to i40e_client_del_instance frees the object pf->cinst, however pf->cinst->lan_info is being accessed after the free. Fix this by adding the missing return. Addresses-Coverity: ("Read from pointer after free")

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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

References

Advisories & Patches

https://git.kernel.org/stable/c/1fd5d262e7442192ac7611ff1597a36c5b044323 https://git.kernel.org/stable/c/38318f23a7ef86a8b1862e5e8078c4de121960c3 https://git.kernel.org/stable/c/4ebc10aa7cd17fd9857dedac69600465c9dd16d1 https://git.kernel.org/stable/c/829a713450b8fb127cbabfc1244c1d8179ec5107 https://git.kernel.org/stable/c/c1322eaeb8af0d8985b5cc5fa759140fa0e57b84 https://git.kernel.org/stable/c/d718c15a2bf9ae082d5ae4d177fb19ef23cb4132 https://git.kernel.org/stable/c/1fd5d262e7442192ac7611ff1597a36c5b044323 https://git.kernel.org/stable/c/38318f23a7ef86a8b1862e5e8078c4de121960c3 https://git.kernel.org/stable/c/4ebc10aa7cd17fd9857dedac69600465c9dd16d1 https://git.kernel.org/stable/c/829a713450b8fb127cbabfc1244c1d8179ec5107 https://git.kernel.org/stable/c/c1322eaeb8af0d8985b5cc5fa759140fa0e57b84 https://git.kernel.org/stable/c/d718c15a2bf9ae082d5ae4d177fb19ef23cb4132

Frequently Asked Questions

What is CVE-2021-46991? +
In the Linux kernel, the following vulnerability has been resolved: i40e: Fix use-after-free in i40e_client_subtask() Currently the call to i40e_client_del_instance frees the object pf->cinst, however pf->cinst->lan_info is being accessed after the free. Fix this by adding the missing return. Addresses-Coverity: ("Read from pointer after free") It has a CVSS v3.1 base score of 7.8 (HIGH).
How severe is CVE-2021-46991? +
CVE-2021-46991 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-2021-46991? +
CVE-2021-46991 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-2021-46991? +
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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