{"id":"CVE-2026-90348","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath10k: snoc: use memcpy_fromio() for MSA ramdump\n\nOn WCN3990/SNOC the MSA region is mapped with devm_memremap(MEMREMAP_WT).\nOn arm64 such a mapping is not Normal…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath10k: snoc: use memcpy_fromio() for MSA ramdump\n\nOn WCN3990/SNOC the MSA region is mapped with devm_memremap(MEMREMAP_WT).\nOn arm64 such a mapping is not Normal…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 3f14b73c38431a6a1ed24de568e18ed89b7082e2 < e5bc3658da9c8a535e3fa5c0c875b2a456954e81","Linux >= 3f14b73c38431a6a1ed24de568e18ed89b7082e2 < fed1f662c9f9fd19eeab6c01966b7b5a33804420","Linux >= 3f14b73c38431a6a1ed24de568e18ed89b7082e2 < 838cab267ce9a975776e022f25094f8cbe1625d2","Linux >= 3f14b73c38431a6a1ed24de568e18ed89b7082e2 < eb946595a58decdb4cab1b5f3c972ae66f41f1c8","Linux >= 3f14b73c38431a6a1ed24de568e18ed89b7082e2 < 152e894e90716163c646d70f86b3afeb70442783","Linux >= 3f14b73c38431a6a1ed24de568e18ed89b7082e2 < 7039825a7479df637c4f5d546cb0e1cec18cd8e1","Linux >= 3f14b73c38431a6a1ed24de568e18ed89b7082e2 < 045d1bfb72d2631ab9ec74afa491aa788ebb57aa","Linux >= 3f14b73c38431a6a1ed24de568e18ed89b7082e2 < 4f25071afe9218aaae1c63fbf75e229aa6405319","Linux 5.5"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:33.553","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90348","references":[{"url":"https://git.kernel.org/stable/c/045d1bfb72d2631ab9ec74afa491aa788ebb57aa","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/152e894e90716163c646d70f86b3afeb70442783","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4f25071afe9218aaae1c63fbf75e229aa6405319","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7039825a7479df637c4f5d546cb0e1cec18cd8e1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/838cab267ce9a975776e022f25094f8cbe1625d2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e5bc3658da9c8a535e3fa5c0c875b2a456954e81","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eb946595a58decdb4cab1b5f3c972ae66f41f1c8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fed1f662c9f9fd19eeab6c01966b7b5a33804420","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.815Z","epss":0.00211,"epssPercentile":0.11579,"slug":"CVE-2026-90348","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath10k: snoc: use memcpy_fromio() for MSA ramdump\n\nOn WCN3990/SNOC the MSA region is mapped with devm_memremap(MEMREMAP_WT).\nOn arm64 such a mapping is not Normal-cacheable, so unaligned accesses to\nit are not permitted. ath10k_msa_dump_memory() copies the region with a\nplain memcpy(), whose optimized __pi_memcpy_generic implementation issues\nwide/unaligned loads. This triggers an alignment fault (FSC=0x21) Oops in\nath10k_snoc_fw_crashed_dump() while collecting the devcoredump:\n\n  Unable to handle kernel paging request ... FSC=0x21: alignment fault\n  pc : __pi_memcpy_generic\n  lr : ath10k_snoc_fw_crashed_dump [ath10k_snoc]\n\nThe Oops both leaves the firmware RAM dump buffer zeroed (no dump is\ncaptured) and crashes the kernel, which in turn breaks modem SSR\nrecovery.\n\nUse memcpy_fromio(), which only performs accesses that are valid for such\na device-memory mapping. The generic memcpy_fromio() implementation aligns\nthe source before issuing word-sized reads and stores the destination with\nput_unaligned(), so it is also safe for the coherent DMA allocation used on\nthe non-reserved-memory path. ath11k and ath12k use the same pattern\nwhen copying target memory into crash dumps, so call it unconditionally\nhere too.\nThe MEMREMAP_WT pointer is a plain void *, so an explicit __iomem cast is\nneeded; use __force to keep sparse happy.\n\nTested-on: WCN3990 hw1.0 SNOC WLAN.HL.3.3.7.c5-00107-QCAHLSWMTPL-1\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":[]}