| 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-2024-45027: usb: xhci: Check for xhci->interrupters being allocated in xhci_mem_clearup() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| usb: xhci: Check for xhci->interrupters being allocated in xhci_mem_clearup() |
| |
| If xhci_mem_init() fails, it calls into xhci_mem_cleanup() to mop |
| up the damage. If it fails early enough, before xhci->interrupters |
| is allocated but after xhci->max_interrupters has been set, which |
| happens in most (all?) cases, things get uglier, as xhci_mem_cleanup() |
| unconditionally derefences xhci->interrupters. With prejudice. |
| |
| Gate the interrupt freeing loop with a check on xhci->interrupters |
| being non-NULL. |
| |
| Found while debugging a DMA allocation issue that led the XHCI driver |
| on this exact path. |
| |
| The Linux kernel CVE team has assigned CVE-2024-45027 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.8 with commit c99b38c412343053e9af187e595793c8805bb9b8 and fixed in 6.10.7 with commit 770cacc75b0091ece17349195d72133912c1ca7c |
| Issue introduced in 6.8 with commit c99b38c412343053e9af187e595793c8805bb9b8 and fixed in 6.11 with commit dcdb52d948f3a17ccd3fce757d9bd981d7c32039 |
| |
| 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-2024-45027 |
| 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-mem.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/3efb29f6a78d4746f958c1ab6cd7981c5762f03b |
| https://git.kernel.org/stable/c/770cacc75b0091ece17349195d72133912c1ca7c |
| https://git.kernel.org/stable/c/dcdb52d948f3a17ccd3fce757d9bd981d7c32039 |
