| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2023-52898: xhci: Fix null pointer dereference when host dies |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| xhci: Fix null pointer dereference when host dies |
| |
| Make sure xhci_free_dev() and xhci_kill_endpoint_urbs() do not race |
| and cause null pointer dereference when host suddenly dies. |
| |
| Usb core may call xhci_free_dev() which frees the xhci->devs[slot_id] |
| virt device at the same time that xhci_kill_endpoint_urbs() tries to |
| loop through all the device's endpoints, checking if there are any |
| cancelled urbs left to give back. |
| |
| hold the xhci spinlock while freeing the virt device |
| |
| The Linux kernel CVE team has assigned CVE-2023-52898 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.15 with commit 11ec7588a10d4bc2e1e385ac565d2166d375fba1 and fixed in 4.19.271 with commit 6fac4b5cecb3928a0a81069aaa815a2edc8dd5a1 |
| Issue introduced in 4.15 with commit 11ec7588a10d4bc2e1e385ac565d2166d375fba1 and fixed in 5.4.230 with commit 133b902378e4acbd824c29dd0d48570ad596e368 |
| Issue introduced in 4.15 with commit 11ec7588a10d4bc2e1e385ac565d2166d375fba1 and fixed in 5.10.165 with commit 081105213ff6f661c114781d469233c7d0e09c2e |
| Issue introduced in 4.15 with commit 11ec7588a10d4bc2e1e385ac565d2166d375fba1 and fixed in 5.15.90 with commit c462ac871f49753eca86bb960f573b993976a5ea |
| Issue introduced in 4.15 with commit 11ec7588a10d4bc2e1e385ac565d2166d375fba1 and fixed in 6.1.8 with commit ea2ee5e9991caf74e0604f994c1831a5867055b2 |
| Issue introduced in 4.15 with commit 11ec7588a10d4bc2e1e385ac565d2166d375fba1 and fixed in 6.2 with commit a2bc47c43e70cf904b1af49f76d572326c08bca7 |
| |
| 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-2023-52898 |
| 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/usb/host/xhci.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/6fac4b5cecb3928a0a81069aaa815a2edc8dd5a1 |
| https://git.kernel.org/stable/c/133b902378e4acbd824c29dd0d48570ad596e368 |
| https://git.kernel.org/stable/c/081105213ff6f661c114781d469233c7d0e09c2e |
| https://git.kernel.org/stable/c/c462ac871f49753eca86bb960f573b993976a5ea |
| https://git.kernel.org/stable/c/ea2ee5e9991caf74e0604f994c1831a5867055b2 |
| https://git.kernel.org/stable/c/a2bc47c43e70cf904b1af49f76d572326c08bca7 |
