| 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-2024-41039: firmware: cs_dsp: Fix overflow checking of wmfw header |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| firmware: cs_dsp: Fix overflow checking of wmfw header |
| |
| Fix the checking that firmware file buffer is large enough for the |
| wmfw header, to prevent overrunning the buffer. |
| |
| The original code tested that the firmware data buffer contained |
| enough bytes for the sums of the size of the structs |
| |
| wmfw_header + wmfw_adsp1_sizes + wmfw_footer |
| |
| But wmfw_adsp1_sizes is only used on ADSP1 firmware. For ADSP2 and |
| Halo Core the equivalent struct is wmfw_adsp2_sizes, which is |
| 4 bytes longer. So the length check didn't guarantee that there |
| are enough bytes in the firmware buffer for a header with |
| wmfw_adsp2_sizes. |
| |
| This patch splits the length check into three separate parts. Each |
| of the wmfw_header, wmfw_adsp?_sizes and wmfw_footer are checked |
| separately before they are used. |
| |
| The Linux kernel CVE team has assigned CVE-2024-41039 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.16 with commit f6bc909e7673c30abcbdb329e7d0aa2e83c103d7 and fixed in 6.1.100 with commit fd035f0810b33c2a8792effdb82bf35920221565 |
| Issue introduced in 5.16 with commit f6bc909e7673c30abcbdb329e7d0aa2e83c103d7 and fixed in 6.6.41 with commit 9c9877a96e033bf6c6470b3b4f06106d91ace11e |
| Issue introduced in 5.16 with commit f6bc909e7673c30abcbdb329e7d0aa2e83c103d7 and fixed in 6.9.10 with commit 49a79f344d0a17c6a5eef53716cc76fcdbfca9ba |
| Issue introduced in 5.16 with commit f6bc909e7673c30abcbdb329e7d0aa2e83c103d7 and fixed in 6.10 with commit 3019b86bce16fbb5bc1964f3544d0ce7d0137278 |
| |
| 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-2024-41039 |
| 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/firmware/cirrus/cs_dsp.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/fd035f0810b33c2a8792effdb82bf35920221565 |
| https://git.kernel.org/stable/c/9c9877a96e033bf6c6470b3b4f06106d91ace11e |
| https://git.kernel.org/stable/c/49a79f344d0a17c6a5eef53716cc76fcdbfca9ba |
| https://git.kernel.org/stable/c/3019b86bce16fbb5bc1964f3544d0ce7d0137278 |
