| 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-2023-52913: drm/i915: Fix potential context UAFs |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/i915: Fix potential context UAFs |
| |
| gem_context_register() makes the context visible to userspace, and which |
| point a separate thread can trigger the I915_GEM_CONTEXT_DESTROY ioctl. |
| So we need to ensure that nothing uses the ctx ptr after this. And we |
| need to ensure that adding the ctx to the xarray is the *last* thing |
| that gem_context_register() does with the ctx pointer. |
| |
| [tursulin: Stable and fixes tags add/tidy.] |
| (cherry picked from commit bed4b455cf5374e68879be56971c1da563bcd90c) |
| |
| The Linux kernel CVE team has assigned CVE-2023-52913 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10 with commit eb4dedae920a07c485328af3da2202ec5184fb17 and fixed in 5.15.171 with commit ae278887193110dfeb857ea63e243a3851fbb0bc |
| Issue introduced in 5.10 with commit eb4dedae920a07c485328af3da2202ec5184fb17 and fixed in 6.1.7 with commit b696c627b3f56e173f7f70b8487d66da8ff22506 |
| Issue introduced in 5.10 with commit eb4dedae920a07c485328af3da2202ec5184fb17 and fixed in 6.2 with commit afce71ff6daa9c0f852df0727fe32c6fb107f0fa |
| |
| 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-2023-52913 |
| 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/i915/gem/i915_gem_context.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/ae278887193110dfeb857ea63e243a3851fbb0bc |
| https://git.kernel.org/stable/c/b696c627b3f56e173f7f70b8487d66da8ff22506 |
| https://git.kernel.org/stable/c/afce71ff6daa9c0f852df0727fe32c6fb107f0fa |
