| 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-2024-57981: usb: xhci: Fix NULL pointer dereference on certain command aborts |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| usb: xhci: Fix NULL pointer dereference on certain command aborts |
| |
| If a command is queued to the final usable TRB of a ring segment, the |
| enqueue pointer is advanced to the subsequent link TRB and no further. |
| If the command is later aborted, when the abort completion is handled |
| the dequeue pointer is advanced to the first TRB of the next segment. |
| |
| If no further commands are queued, xhci_handle_stopped_cmd_ring() sees |
| the ring pointers unequal and assumes that there is a pending command, |
| so it calls xhci_mod_cmd_timer() which crashes if cur_cmd was NULL. |
| |
| Don't attempt timer setup if cur_cmd is NULL. The subsequent doorbell |
| ring likely is unnecessary too, but it's harmless. Leave it alone. |
| |
| This is probably Bug 219532, but no confirmation has been received. |
| |
| The issue has been independently reproduced and confirmed fixed using |
| a USB MCU programmed to NAK the Status stage of SET_ADDRESS forever. |
| Everything continued working normally after several prevented crashes. |
| |
| The Linux kernel CVE team has assigned CVE-2024-57981 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.16 with commit c311e391a7efd101250c0e123286709b7e736249 and fixed in 5.4.291 with commit fd8bfaeba4a85b14427899adec0efb3954300653 |
| Issue introduced in 3.16 with commit c311e391a7efd101250c0e123286709b7e736249 and fixed in 5.10.235 with commit b44253956407046e5907d4d72c8fa5b93ae94485 |
| Issue introduced in 3.16 with commit c311e391a7efd101250c0e123286709b7e736249 and fixed in 5.15.179 with commit cf30300a216a4f8dce94e11781a866a09d4b50d4 |
| Issue introduced in 3.16 with commit c311e391a7efd101250c0e123286709b7e736249 and fixed in 6.1.129 with commit 4ff18870af793ce2034a6ad746e91d0a3d985b88 |
| Issue introduced in 3.16 with commit c311e391a7efd101250c0e123286709b7e736249 and fixed in 6.6.76 with commit b649f0d5bc256f691c7d234c3986685d54053de1 |
| Issue introduced in 3.16 with commit c311e391a7efd101250c0e123286709b7e736249 and fixed in 6.12.13 with commit ae069cd2ba09a2bd6a87a68c59ef0b7ea39cd641 |
| Issue introduced in 3.16 with commit c311e391a7efd101250c0e123286709b7e736249 and fixed in 6.13.2 with commit 0ce5c0dac768be14afe2426101b568a0f66bfc4d |
| Issue introduced in 3.16 with commit c311e391a7efd101250c0e123286709b7e736249 and fixed in 6.14 with commit 1e0a19912adb68a4b2b74fd77001c96cd83eb073 |
| |
| 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-2024-57981 |
| 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-ring.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/fd8bfaeba4a85b14427899adec0efb3954300653 |
| https://git.kernel.org/stable/c/b44253956407046e5907d4d72c8fa5b93ae94485 |
| https://git.kernel.org/stable/c/cf30300a216a4f8dce94e11781a866a09d4b50d4 |
| https://git.kernel.org/stable/c/4ff18870af793ce2034a6ad746e91d0a3d985b88 |
| https://git.kernel.org/stable/c/b649f0d5bc256f691c7d234c3986685d54053de1 |
| https://git.kernel.org/stable/c/ae069cd2ba09a2bd6a87a68c59ef0b7ea39cd641 |
| https://git.kernel.org/stable/c/0ce5c0dac768be14afe2426101b568a0f66bfc4d |
| https://git.kernel.org/stable/c/1e0a19912adb68a4b2b74fd77001c96cd83eb073 |
