| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-38575: wifi: brcmfmac: pcie: handle randbuf allocation failure |
| |
| 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. |
| |
| The Linux kernel CVE team has assigned CVE-2024-38575 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.1.30 with commit c35105f375b530bc27e03ea9250b1c26dd4cae86 and fixed in 6.1.93 with commit 0eb2c0528e232b3c32cde9d5e1c9f80ba2996e49 |
| Issue introduced in 6.4 with commit 91918ce88d9fef408bb12c46a27c73d79b604c20 and fixed in 6.6.33 with commit c37466406f075476c2702ecc01917928af871f3b |
| Issue introduced in 6.4 with commit 91918ce88d9fef408bb12c46a27c73d79b604c20 and fixed in 6.8.12 with commit 7c15eb344b0d4d3468c9b2a7591ad2b859b29b88 |
| Issue introduced in 6.4 with commit 91918ce88d9fef408bb12c46a27c73d79b604c20 and fixed in 6.9.3 with commit 3729ca9e48d19a03ae049e2bde510e161c2f3720 |
| Issue introduced in 6.4 with commit 91918ce88d9fef408bb12c46a27c73d79b604c20 and fixed in 6.10 with commit 316f790ebcf94bdf59f794b7cdea4068dc676d4c |
| Issue introduced in 6.3.4 with commit ba72baed066f3bfa8b489e4b58f1fcaf51c04f83 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-38575 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/0eb2c0528e232b3c32cde9d5e1c9f80ba2996e49 |
| https://git.kernel.org/stable/c/c37466406f075476c2702ecc01917928af871f3b |
| https://git.kernel.org/stable/c/7c15eb344b0d4d3468c9b2a7591ad2b859b29b88 |
| https://git.kernel.org/stable/c/3729ca9e48d19a03ae049e2bde510e161c2f3720 |
| https://git.kernel.org/stable/c/316f790ebcf94bdf59f794b7cdea4068dc676d4c |
