CVE-2024-26975: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: powercap: intel_rapl: Fix a NULL pointer dereference A NULL pointer dereference is triggered when probing the MMIO RAPL driver on platforms with CPU ID not listed in intel_rapl_common CPU model list. This is because the intel_rapl_common module still probes on such platforms even if 'defaults_msr' is not set after commit 1488ac990ac8 ("powercap: intel_rapl: Allow probing without CPUID match"). Thus the MMIO RAPL rp->priv->defaults is NULL when registering to RAPL framework. Fix the problem by adding sanity check to ensure rp->priv->rapl_defaults is always valid.

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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	6.5 — 6.6.24
linux	linux_kernel	6.7 — 6.7.12
linux	linux_kernel	6.8 — 6.8.3

References

Advisories & Patches

https://git.kernel.org/stable/c/0641908b906a133f1494c312a71f9fecbe2b6c78 https://git.kernel.org/stable/c/2d1f5006ff95770da502f8cee2a224a1ff83866e https://git.kernel.org/stable/c/2f73cf2ae5e0f4e629db5be3a4380ff7807148e6 https://git.kernel.org/stable/c/9b254feb249981b66ccdb1dae54e757789a15ba1 https://git.kernel.org/stable/c/0641908b906a133f1494c312a71f9fecbe2b6c78 https://git.kernel.org/stable/c/2d1f5006ff95770da502f8cee2a224a1ff83866e https://git.kernel.org/stable/c/2f73cf2ae5e0f4e629db5be3a4380ff7807148e6 https://git.kernel.org/stable/c/9b254feb249981b66ccdb1dae54e757789a15ba1

Frequently Asked Questions

What is CVE-2024-26975? +

In the Linux kernel, the following vulnerability has been resolved: powercap: intel_rapl: Fix a NULL pointer dereference A NULL pointer dereference is triggered when probing the MMIO RAPL driver on platforms with CPU ID not listed in intel_rapl_common CPU model list. This is because the intel_rapl_common module still probes on such platforms even if 'defaults_msr' is not set after commit 1488ac990ac8 ("powercap: intel_rapl: Allow probing without CPUID match"). Thus the MMIO RAPL rp->priv->defaults is NULL when registering to RAPL framework. Fix the problem by adding sanity check to ensure rp->priv->rapl_defaults is always valid. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26975? +

CVE-2024-26975 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-2024-26975? +

CVE-2024-26975 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-2024-26975? +

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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