| 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-2022-48899: drm/virtio: Fix GEM handle creation UAF |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/virtio: Fix GEM handle creation UAF |
| |
| Userspace can guess the handle value and try to race GEM object creation |
| with handle close, resulting in a use-after-free if we dereference the |
| object after dropping the handle's reference. For that reason, dropping |
| the handle's reference must be done *after* we are done dereferencing |
| the object. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48899 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.4 with commit 62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 and fixed in 4.19.270 with commit 19ec87d06acfab2313ee82b2a689bf0c154e57ea |
| Issue introduced in 4.4 with commit 62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 and fixed in 5.4.229 with commit d01d6d2b06c0d8390adf8f3ba08aa60b5642ef73 |
| Issue introduced in 4.4 with commit 62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 and fixed in 5.10.164 with commit 68bcd063857075d2f9edfed6024387ac377923e2 |
| Issue introduced in 4.4 with commit 62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 and fixed in 5.15.89 with commit 011ecdbcd520c90c344b872ca6b4821f7783b2f8 |
| Issue introduced in 4.4 with commit 62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 and fixed in 6.1.7 with commit adc48e5e408afbb01d261bd303fd9fbbbaa3e317 |
| Issue introduced in 4.4 with commit 62fb7a5e10962ac6ae2a2d2dbd3aedcb2a3e3257 and fixed in 6.2 with commit 52531258318ed59a2dc5a43df2eaf0eb1d65438e |
| |
| 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-2022-48899 |
| 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/virtio/virtgpu_ioctl.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/19ec87d06acfab2313ee82b2a689bf0c154e57ea |
| https://git.kernel.org/stable/c/d01d6d2b06c0d8390adf8f3ba08aa60b5642ef73 |
| https://git.kernel.org/stable/c/68bcd063857075d2f9edfed6024387ac377923e2 |
| https://git.kernel.org/stable/c/011ecdbcd520c90c344b872ca6b4821f7783b2f8 |
| https://git.kernel.org/stable/c/adc48e5e408afbb01d261bd303fd9fbbbaa3e317 |
| https://git.kernel.org/stable/c/52531258318ed59a2dc5a43df2eaf0eb1d65438e |
