| 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-2024-44967: drm/mgag200: Bind I2C lifetime to DRM device |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/mgag200: Bind I2C lifetime to DRM device |
| |
| Managed cleanup with devm_add_action_or_reset() will release the I2C |
| adapter when the underlying Linux device goes away. But the connector |
| still refers to it, so this cleanup leaves behind a stale pointer |
| in struct drm_connector.ddc. |
| |
| Bind the lifetime of the I2C adapter to the connector's lifetime by |
| using DRM's managed release. When the DRM device goes away (after |
| the Linux device) DRM will first clean up the connector and then |
| clean up the I2C adapter. |
| |
| The Linux kernel CVE team has assigned CVE-2024-44967 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.0 with commit b279df242972ae816a75cf1cc732af836f999100 and fixed in 6.1.105 with commit 55a6916db77102765b22855d3a0add4751988b7c |
| Issue introduced in 6.0 with commit b279df242972ae816a75cf1cc732af836f999100 and fixed in 6.6.46 with commit 81d34df843620e902dd04aa9205c875833d61c17 |
| Issue introduced in 6.0 with commit b279df242972ae816a75cf1cc732af836f999100 and fixed in 6.10.5 with commit 9d96b91e03cba9dfcb4ac370c93af4dbc47d5191 |
| Issue introduced in 6.0 with commit b279df242972ae816a75cf1cc732af836f999100 and fixed in 6.11 with commit eb1ae34e48a09b7a1179c579aed042b032e408f4 |
| |
| 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-2024-44967 |
| 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/mgag200/mgag200_i2c.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/55a6916db77102765b22855d3a0add4751988b7c |
| https://git.kernel.org/stable/c/81d34df843620e902dd04aa9205c875833d61c17 |
| https://git.kernel.org/stable/c/9d96b91e03cba9dfcb4ac370c93af4dbc47d5191 |
| https://git.kernel.org/stable/c/eb1ae34e48a09b7a1179c579aed042b032e408f4 |
