{"id":"CVE-2026-90348","summary":"wifi: ath10k: snoc: use memcpy_fromio() for MSA ramdump","details":"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-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","modified":"2026-09-18T03:48:37.780226430Z","published":"2026-09-17T16:08:56.885Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90348.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/045d1bfb72d2631ab9ec74afa491aa788ebb57aa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/152e894e90716163c646d70f86b3afeb70442783"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4f25071afe9218aaae1c63fbf75e229aa6405319"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7039825a7479df637c4f5d546cb0e1cec18cd8e1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/838cab267ce9a975776e022f25094f8cbe1625d2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e5bc3658da9c8a535e3fa5c0c875b2a456954e81"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eb946595a58decdb4cab1b5f3c972ae66f41f1c8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fed1f662c9f9fd19eeab6c01966b7b5a33804420"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90348.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90348"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3f14b73c38431a6a1ed24de568e18ed89b7082e2"},{"fixed":"e5bc3658da9c8a535e3fa5c0c875b2a456954e81"},{"fixed":"fed1f662c9f9fd19eeab6c01966b7b5a33804420"},{"fixed":"838cab267ce9a975776e022f25094f8cbe1625d2"},{"fixed":"eb946595a58decdb4cab1b5f3c972ae66f41f1c8"},{"fixed":"152e894e90716163c646d70f86b3afeb70442783"},{"fixed":"7039825a7479df637c4f5d546cb0e1cec18cd8e1"},{"fixed":"045d1bfb72d2631ab9ec74afa491aa788ebb57aa"},{"fixed":"4f25071afe9218aaae1c63fbf75e229aa6405319"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90348.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.270"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.221"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90348.json"}}],"schema_version":"1.9.0"}