| 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-2023-52773: drm/amd/display: fix a NULL pointer dereference in amdgpu_dm_i2c_xfer() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/display: fix a NULL pointer dereference in amdgpu_dm_i2c_xfer() |
| |
| When ddc_service_construct() is called, it explicitly checks both the |
| link type and whether there is something on the link which will |
| dictate whether the pin is marked as hw_supported. |
| |
| If the pin isn't set or the link is not set (such as from |
| unloading/reloading amdgpu in an IGT test) then fail the |
| amdgpu_dm_i2c_xfer() call. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52773 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.0 with commit 22676bc500c27d987a0b42cbe162aebf783f1c38 and fixed in 6.1.64 with commit fb5c134ca589fe670430acc9e7ebf2691ca2476d |
| Issue introduced in 6.0 with commit 22676bc500c27d987a0b42cbe162aebf783f1c38 and fixed in 6.5.13 with commit 5b14cf37b9f01de0b28c6f8960019d4c7883ce42 |
| Issue introduced in 6.0 with commit 22676bc500c27d987a0b42cbe162aebf783f1c38 and fixed in 6.6.3 with commit 1d07b7e84276777dad3c8cfebdf8e739606f90c9 |
| Issue introduced in 6.0 with commit 22676bc500c27d987a0b42cbe162aebf783f1c38 and fixed in 6.7 with commit b71f4ade1b8900d30c661d6c27f87c35214c398c |
| |
| 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-2023-52773 |
| 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/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.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/fb5c134ca589fe670430acc9e7ebf2691ca2476d |
| https://git.kernel.org/stable/c/5b14cf37b9f01de0b28c6f8960019d4c7883ce42 |
| https://git.kernel.org/stable/c/1d07b7e84276777dad3c8cfebdf8e739606f90c9 |
| https://git.kernel.org/stable/c/b71f4ade1b8900d30c661d6c27f87c35214c398c |
