CVE-2024-26975: powercap: intel_rapl: Fix a NULL pointer dereference
First published: Wed May 01 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.6.24 | 6.6.24 |
| redhat/kernel | <6.7.12 | 6.7.12 |
| redhat/kernel | <6.8.3 | 6.8.3 |
| redhat/kernel | <6.9 | 6.9 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.10-1 | |
| Linux Kernel | >=6.5<6.6.24 | |
| Linux Kernel | >=6.7<6.7.12 | |
| Linux Kernel | >=6.8<6.8.3 |
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Reference Links
- 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://launchpad.net/bugs/cve/CVE-2024-26975
- https://access.redhat.com/security/cve/CVE-2024-26975
- https://lore.kernel.org/linux-cve-announce/2024050133-CVE-2024-26975-d184@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2278353
- https://access.redhat.com/errata/RHSA-2024:9315
- https://bugzilla.redhat.com/show_bug.cgi?id=2278352
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26975
- https://nvd.nist.gov/vuln/detail/CVE-2024-26975
- https://security-tracker.debian.org/tracker/CVE-2024-26975
- https://ubuntu.com/security/CVE-2024-26975
- https://git.kernel.org/linus/2d1f5006ff95770da502f8cee2a224a1ff83866e
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