{"id":"CVE-2026-97506","published":"2026-09-24T17:17:28.423","lastModified":"2026-09-28T06:16:36.570","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: ixp4xx - fix buffer chain unwind on allocation failure\n\nchainup_buffers() builds a linked list of buffer descriptors for a\nscatterlist. If dma_pool_alloc() fails while constructing the list, the\ncurrent code sets buf to NULL and later dereferences it unconditionally\nat the end of the function:\n\n  buf->next = NULL;\n  buf->phys_next = 0;\n\nThis can lead to a null-pointer dereference on allocation failure.\n\nIf the failure happens after part of the descriptor chain has already\nbeen allocated and DMA-mapped, the partially constructed chain also\nneeds to be released.\n\nFix this by terminating the partially constructed chain on allocation\nfailure and letting the callers unwind it via their existing cleanup\npaths. Also fix ablk_perform() to preserve the hook pointers before\nchecking for failure, so partially built chains can be freed correctly.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/028a7f4f3d69e551f6bf9f728d547bbf4cfc707d","tags":[]},{"url":"https://git.kernel.org/stable/c/04cb00106ca4d0fa9eca24cadc4eda6036e855c8","tags":[]},{"url":"https://git.kernel.org/stable/c/25056329384010a8672552b134f609601dc4f80e","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}