CVE-2026-43432

01/תיאור (מקור, אנגלית)

In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Fix memory leak in xhci_disable_slot() xhci_alloc_command() allocates a command structure and, when the second argument is true, also allocates a completion structure. Currently, the error handling path in xhci_disable_slot() only frees the command structure using kfree(), causing the completion structure to leak. Use xhci_free_command() instead of kfree(). xhci_free_command() correctly frees both the command structure and the associated completion structure. Since the command structure is allocated with zero-initialization, command->in_ctx is NULL and will not be erroneously freed by xhci_free_command(). This bug was found using an experimental static analysis tool we are developing. The tool is based on the LLVM framework and is specifically designed to detect memory management issues. It is currently under active development and not yet publicly available, but we plan to open-source it after our research is published. The bug was originally detected on v6.13-rc1 using our static analysis tool, and we have verified that the issue persists in the latest mainline kernel. We performed build testing on x86_64 with allyesconfig using GCC=11.4.0. Since triggering these error paths in xhci_disable_slot() requires specific hardware conditions or abnormal state, we were unable to construct a test case to reliably trigger these specific error paths at runtime.

02/מוצרים מושפעים

linux: linux kernel

03/קישורים8

• git.kernel.org/stable/c/078b446efc0f5e496c31bccb72b98af979963a83 Patch
• git.kernel.org/stable/c/1e800e26d54ccf2ddf2ea6d6cbe021c804d8aa62 Patch
• git.kernel.org/stable/c/2e2baa8fb5aa4d080cbfeb84c51eff797529f413 Patch
• git.kernel.org/stable/c/46aea90763832cd6e9b0c2e1c00e6a9512156d4b Patch
• git.kernel.org/stable/c/6288baf0c8c4dcfbf206773aede9c1f2269cec28 Patch
• git.kernel.org/stable/c/807e4fb5140c73eb5dba1e399a990db5c1f3cdf8 Patch
• git.kernel.org/stable/c/c1c8550e70401159184130a1afc6261db01fc0ce Patch
• git.kernel.org/stable/c/c65f1b840ab8ce72ba68f1b63bab7960f8fdfa89 Patch