medium
5.5
CWE
476
Advisory Published
CVE Published
Updated

CVE-2024-38575: wifi: brcmfmac: pcie: handle randbuf allocation failure

First published: Wed Jun 19 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: pcie: handle randbuf allocation failure The kzalloc() in brcmf_pcie_download_fw_nvram() will return null if the physical memory has run out. As a result, if we use get_random_bytes() to generate random bytes in the randbuf, the null pointer dereference bug will happen. In order to prevent allocation failure, this patch adds a separate function using buffer on kernel stack to generate random bytes in the randbuf, which could prevent the kernel stack from overflow.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
redhat/kernel<6.1.93
6.1.93
redhat/kernel<6.6.33
6.6.33
redhat/kernel<6.8.12
6.8.12
redhat/kernel<6.9.3
6.9.3
redhat/kernel<6.10
6.10
Linux Kernel>=6.1.30<6.1.93
Linux Kernel>=6.3.4<6.6.33
Linux Kernel>=6.7<6.8.12
Linux Kernel>=6.9<6.9.3
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Software Stack<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Virtual Appliance<=ISVG 10.0.2
IBM Security Verify Governance Identity Manager Container<=ISVG 10.0.2
debian/linux
5.10.223-1
5.10.234-1
6.1.129-1
6.1.128-1
6.12.21-1
6.12.22-1

Remedy

https://git.kernel.org/stable/c/0eb2c0528e232b3c32cde9d5e1c9f80ba2996e49

Remedy

https://git.kernel.org/stable/c/316f790ebcf94bdf59f794b7cdea4068dc676d4c

Remedy

https://git.kernel.org/stable/c/3729ca9e48d19a03ae049e2bde510e161c2f3720

Remedy

https://git.kernel.org/stable/c/7c15eb344b0d4d3468c9b2a7591ad2b859b29b88

Remedy

https://git.kernel.org/stable/c/c37466406f075476c2702ecc01917928af871f3b

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2024-38575?

    CVE-2024-38575 is considered a high-severity vulnerability due to its potential impact on the Linux kernel's memory management.

  • How do I fix CVE-2024-38575?

    To resolve CVE-2024-38575, update the Linux kernel to versions 6.1.93, 6.6.33, 6.8.12, 6.9.3, 6.10, or later.

  • Which Linux distributions are affected by CVE-2024-38575?

    CVE-2024-38575 affects several distributions that use vulnerable versions of the Linux kernel, specifically Red Hat and Debian derivatives.

  • What components are vulnerable in CVE-2024-38575?

    The vulnerability in CVE-2024-38575 is specifically related to the brcmfmac PCIe module in the Linux kernel.

  • Can CVE-2024-38575 lead to system crashes?

    Yes, CVE-2024-38575 can potentially cause system instability or crashes due to memory allocation failures.

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