{"id":"CVE-2026-31395","summary":"bnxt_en: fix OOB access in DBG_BUF_PRODUCER async event handler","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbnxt_en: fix OOB access in DBG_BUF_PRODUCER async event handler\n\nThe ASYNC_EVENT_CMPL_EVENT_ID_DBG_BUF_PRODUCER handler in\nbnxt_async_event_process() uses a firmware-supplied 'type' field\ndirectly as an index into bp-\u003ebs_trace[] without bounds validation.\n\nThe 'type' field is a 16-bit value extracted from DMA-mapped completion\nring memory that the NIC writes directly to host RAM. A malicious or\ncompromised NIC can supply any value from 0 to 65535, causing an\nout-of-bounds access into kernel heap memory.\n\nThe bnxt_bs_trace_check_wrap() call then dereferences bs_trace-\u003emagic_byte\nand writes to bs_trace-\u003elast_offset and bs_trace-\u003ewrapped, leading to\nkernel memory corruption or a crash.\n\nFix by adding a bounds check and defining BNXT_TRACE_MAX as\nDBG_LOG_BUFFER_FLUSH_REQ_TYPE_ERR_QPC_TRACE + 1 to cover all currently\ndefined firmware trace types (0x0 through 0xc).","modified":"2026-06-03T08:44:17.234218835Z","published":"2026-04-03T15:15:59.590Z","related":["SUSE-SU-2026:21841-1","SUSE-SU-2026:21845-1","SUSE-SU-2026:21860-1","SUSE-SU-2026:2217-1","openSUSE-SU-2026:20826-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31395.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/19aa416eed9e4aaf1bbe8da0f7bd9a9be31158c8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/64dcbde7f8f870a4f2d9daf24ffb06f9748b5dd3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b7c7a275447c6d4bf4a36a134682e2e4e20efd4b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31395.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31395"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"84fcd9449fd7882ddfb05ba64d75f9be2d29b2e9"},{"fixed":"19aa416eed9e4aaf1bbe8da0f7bd9a9be31158c8"},{"fixed":"b7c7a275447c6d4bf4a36a134682e2e4e20efd4b"},{"fixed":"64dcbde7f8f870a4f2d9daf24ffb06f9748b5dd3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31395.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.20"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31395.json"}}],"schema_version":"1.7.5"}