CVE-2023-53476: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: iw_cxgb4: Fix potential NULL dereference in c4iw_fill_res_cm_id_entry() This condition needs to match the previous "if (epcp->state == LISTEN) {" exactly to avoid a NULL dereference of either "listen_ep" or "ep". The problem is that "epcp" has been re-assigned so just testing "if (epcp->state == LISTEN) {" a second time is not sufficient.

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CVSS v3.1 Score

5.5

MEDIUM

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

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.18 — 5.15.99
linux	linux_kernel	5.16 — 6.1.16
linux	linux_kernel	6.2 — 6.2.3

References

Advisories & Patches

https://git.kernel.org/stable/c/24278dc380aab6a1aef0a75317f57ad4c2453cf6 https://git.kernel.org/stable/c/4ca446b127c568b59cb8d9748b6f70499624bb18 https://git.kernel.org/stable/c/76e0396313c79ecd0df44ee3c18745cfac52b3e6 https://git.kernel.org/stable/c/dd55240e4364d64befcc575b0d33091881524f42

Frequently Asked Questions

What is CVE-2023-53476? +

In the Linux kernel, the following vulnerability has been resolved: iw_cxgb4: Fix potential NULL dereference in c4iw_fill_res_cm_id_entry() This condition needs to match the previous "if (epcp->state == LISTEN) {" exactly to avoid a NULL dereference of either "listen_ep" or "ep". The problem is that "epcp" has been re-assigned so just testing "if (epcp->state == LISTEN) {" a second time is not sufficient. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53476? +

CVE-2023-53476 has a CVSS v3.1 score of 5.5 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-2023-53476? +

CVE-2023-53476 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-2023-53476? +

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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