CVE-2023-52581

MEDIUM
Published Mar 2, 2024 Modified Apr 4, 2025 CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix memleak when more than 255 elements expired When more than 255 elements expired we're supposed to switch to a new gc container structure. This never happens: u8 type will wrap before reaching the boundary and nft_trans_gc_space() always returns true. This means we recycle the initial gc container structure and lose track of the elements that came before. While at it, don't deref 'gc' after we've passed it to call_rcu.

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CVSS v3.1 Score

6.3
MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H

Weakness Type (CWE)

CWE-401 CWE-401

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/09c85f2d21ab6b5acba31a037985b13e8e6565b8 https://git.kernel.org/stable/c/4aea243b6853d06c1d160a9955b759189aa02b14 https://git.kernel.org/stable/c/7cf055b43756b10aa2b851c927c940f5ed652125 https://git.kernel.org/stable/c/7e5d732e6902eb6a37b35480796838a145ae5f07 https://git.kernel.org/stable/c/a995a68e8a3b48533e47c856865d109a1f1a9d01 https://git.kernel.org/stable/c/cf5000a7787cbc10341091d37245a42c119d26c5 https://git.kernel.org/stable/c/ef99506eaf1dc31feff1adfcfd68bc5535a22171 https://git.kernel.org/stable/c/09c85f2d21ab6b5acba31a037985b13e8e6565b8 https://git.kernel.org/stable/c/4aea243b6853d06c1d160a9955b759189aa02b14 https://git.kernel.org/stable/c/7cf055b43756b10aa2b851c927c940f5ed652125 https://git.kernel.org/stable/c/7e5d732e6902eb6a37b35480796838a145ae5f07 https://git.kernel.org/stable/c/a995a68e8a3b48533e47c856865d109a1f1a9d01 https://git.kernel.org/stable/c/cf5000a7787cbc10341091d37245a42c119d26c5 https://git.kernel.org/stable/c/ef99506eaf1dc31feff1adfcfd68bc5535a22171

Frequently Asked Questions

What is CVE-2023-52581? +
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix memleak when more than 255 elements expired When more than 255 elements expired we're supposed to switch to a new gc container structure. This never happens: u8 type will wrap before reaching the boundary and nft_trans_gc_space() always returns true. This means we recycle the initial gc container structure and lose track of the elements that came before. While at it, don't deref 'gc' after we've passed it to call_rcu. It has a CVSS v3.1 base score of 6.3 (MEDIUM).
How severe is CVE-2023-52581? +
CVE-2023-52581 has a CVSS v3.1 score of 6.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2023-52581? +
CVE-2023-52581 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-2023-52581? +
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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