CVE-2024-47749: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Added NULL check for lookup_atid The lookup_atid() function can return NULL if the ATID is invalid or does not exist in the identifier table, which could lead to dereferencing a null pointer without a check in the `act_establish()` and `act_open_rpl()` functions. Add a NULL check to prevent null pointer dereferencing. Found by Linux Verification Center (linuxtesting.org) with SVACE.

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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	2.6.35 — 5.10.227
linux	linux_kernel	5.11 — 5.15.168
linux	linux_kernel	5.16 — 6.1.113
linux	linux_kernel	6.2 — 6.6.54
linux	linux_kernel	6.7 — 6.10.13
linux	linux_kernel	6.11 — 6.11.2

References

Advisories & Patches

https://git.kernel.org/stable/c/0d50ae281a1712b9b2ca72830a96b8f11882358d https://git.kernel.org/stable/c/39cb9f39913566ec5865581135f3e8123ad1aee1 https://git.kernel.org/stable/c/54aaa3ed40972511e423b604324b881425b9ff1e https://git.kernel.org/stable/c/b11318dc8a1ec565300bb1a9073095af817cc508 https://git.kernel.org/stable/c/b9c94c8ba5a713817cffd74c4bacc05187469624 https://git.kernel.org/stable/c/dd598ac57dcae796cb58551074660c39b43fb155 https://git.kernel.org/stable/c/e766e6a92410ca269161de059fff0843b8ddd65f

Other References

https://git.kernel.org/stable/c/4e1fe68d695af367506ea3c794c5969630f21697 https://git.kernel.org/stable/c/b12e25d91c7f97958341538c7dc63ee49d01548f https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Frequently Asked Questions

What is CVE-2024-47749? +

In the Linux kernel, the following vulnerability has been resolved: RDMA/cxgb4: Added NULL check for lookup_atid The lookup_atid() function can return NULL if the ATID is invalid or does not exist in the identifier table, which could lead to dereferencing a null pointer without a check in the `act_establish()` and `act_open_rpl()` functions. Add a NULL check to prevent null pointer dereferencing. Found by Linux Verification Center (linuxtesting.org) with SVACE. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-47749? +

CVE-2024-47749 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-2024-47749? +

CVE-2024-47749 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-2024-47749? +

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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