CVE-2026-93121: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: Fix fence cleanup in ffs_dmabuf_transfer() error paths The error paths for endpoint-disabled (ESHUTDOWN) and request-allocation failure (ENOMEM) in ffs_dmabuf_transfer() jump to err_fence_put which calls dma_fence_put() on the fence. However, at that point the fence has only been kmalloc'd — dma_fence_init() has not been called yet, so the refcount and the fence ops are uninitialized. Calling dma_fence_put() on such an object leads to undefined behavior. Use kfree() instead, since the fence is just a plain allocation at this stage, and rename the label to err_fence_free to reflect the actual cleanup action.

Засегнати продукти

• Linux Linux: 7b07a2a7ca02a20124b552be96c5a56910795488 преди be539138d9a187af3b884525a395db10797c64f1; 7b07a2a7ca02a20124b552be96c5a56910795488 преди 5fd8baacc7dc477df9cac61b45491840247a9b1e; 7b07a2a7ca02a20124b552be96c5a56910795488 преди 58952c83dfe6ea3294a74734d2d1018c1120779a; 7b07a2a7ca02a20124b552be96c5a56910795488 преди 621707dc67c9846fd876d7579ec951d92aa033f1
• Linux Linux: 6.9; преди 6.9; 6.12.110 до 6.12.*; 6.18.52 до 6.18.*; 7.2.6 до 7.2.*; 7.3 до *

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-93121
• https://nvd.nist.gov/vuln/detail/CVE-2026-93121
• https://git.kernel.org/stable/c/be539138d9a187af3b884525a395db10797c64f1
• https://git.kernel.org/stable/c/5fd8baacc7dc477df9cac61b45491840247a9b1e
• https://git.kernel.org/stable/c/58952c83dfe6ea3294a74734d2d1018c1120779a
• https://git.kernel.org/stable/c/621707dc67c9846fd876d7579ec951d92aa033f1