{"id":"CVE-2026-97506","title":"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","summary":"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() fail…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 0d44dc59b2b434b29aafeae581d06f81efac7c83 < d4007867be42d71795b78fa7f8ce7514dda9ca83","Linux >= 0d44dc59b2b434b29aafeae581d06f81efac7c83 < 4918b0bd7d2baafb45d87dca9e322137c96005c2","Linux >= 0d44dc59b2b434b29aafeae581d06f81efac7c83 < 8c37bc8d6a6f77bf9593fb1bcab6c14c7cf02991","Linux >= 0d44dc59b2b434b29aafeae581d06f81efac7c83 < 04cb00106ca4d0fa9eca24cadc4eda6036e855c8","Linux >= 0d44dc59b2b434b29aafeae581d06f81efac7c83 < 028a7f4f3d69e551f6bf9f728d547bbf4cfc707d","Linux >= 0d44dc59b2b434b29aafeae581d06f81efac7c83 < 25056329384010a8672552b134f609601dc4f80e","Linux 5a80273150a8a1725fa70418d106eb1f2ee8fd2f","Linux 82a8becb9c2c52fc5e67057a43aeded1f0731e7b","Linux 68845515c8b11791b547a2838e22c27dfa3115ee","Linux >= 2.6.27.22 < 2.6.28","Linux >= 2.6.28.10 < 2.6.29","Linux >= 2.6.29.3 < 2.6.30","Linux 2.6.30"],"published":"2026-09-24","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:17:59.963","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97506","references":[{"url":"https://git.kernel.org/stable/c/028a7f4f3d69e551f6bf9f728d547bbf4cfc707d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/04cb00106ca4d0fa9eca24cadc4eda6036e855c8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/25056329384010a8672552b134f609601dc4f80e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4918b0bd7d2baafb45d87dca9e322137c96005c2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8c37bc8d6a6f77bf9593fb1bcab6c14c7cf02991","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d4007867be42d71795b78fa7f8ce7514dda9ca83","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00161,"epssPercentile":0.05224,"ingestedAt":"2026-09-24T16:47:15.862Z","slug":"CVE-2026-97506","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}