CVE-2025-38031

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> padata: do not leak refcount in reorder_work<br /> <br /> A recent patch that addressed a UAF introduced a reference count leak:<br /> the parallel_data refcount is incremented unconditionally, regardless<br /> of the return value of queue_work(). If the work item is already queued,<br /> the incremented refcount is never decremented.<br /> <br /> Fix this by checking the return value of queue_work() and decrementing<br /> the refcount when necessary.<br /> <br /> Resolves:<br /> <br /> Unreferenced object 0xffff9d9f421e3d80 (size 192):<br /> comm "cryptomgr_probe", pid 157, jiffies 4294694003<br /> hex dump (first 32 bytes):<br /> 80 8b cf 41 9f 9d ff ff b8 97 e0 89 ff ff ff ff ...A............<br /> d0 97 e0 89 ff ff ff ff 19 00 00 00 1f 88 23 00 ..............#.<br /> backtrace (crc 838fb36):<br /> __kmalloc_cache_noprof+0x284/0x320<br /> padata_alloc_pd+0x20/0x1e0<br /> padata_alloc_shell+0x3b/0xa0<br /> 0xffffffffc040a54d<br /> cryptomgr_probe+0x43/0xc0<br /> kthread+0xf6/0x1f0<br /> ret_from_fork+0x2f/0x50<br /> ret_from_fork_asm+0x1a/0x30