vulnerability

Red Hat: CVE-2024-38575: kernel: wifi: brcmfmac: pcie: handle randbuf allocation failure (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:L/Au:M/C:N/I:N/A:C)
Published
06/19/2024
Added
08/12/2024
Modified
03/10/2025

Description

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.

Solution(s)

redhat-upgrade-kernelredhat-upgrade-kernel-rt
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