{"id":"CVE-2026-89843","revision":"ad9dadff64884cb48791c39f793afbb1","records":[{"revision":"ad9dadff64884cb48791c39f793afbb1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89843","aliases":[],"title":"scsi: qla2xxx: Zero-init bsg stack buffers to avoid info leak","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Zero-init bsg stack buffers to avoid info leak\n\nSeveral bsg handlers stage their request/reply in an uninitialized 256-byte\non-stack buffer (uint8_t bsg[DMA_POOL_SIZE]) and fill it via\nsg_copy_to_buffer(), which only copies as many bytes as the user-supplied\nrequest payload. When the request is shorter than the structure, the\nremainder of the buffer is left holding stale stack data.\n\nqla2x00_read_fru_status() and qla2x00_read_i2c() then copy the full\nstructure back to the reply payload with sg_copy_from_buffer(), leaking the\nuninitialized stack bytes to user space. The write/update paths do not copy\nthe buffer back, but can feed uninitialized fields to the device.\n\nZero the stack buffer at declaration in all five handlers, mirroring the\nheap kzalloc() approach, so short requests can no longer expose stale\nmemory.","state":0,"publishedAt":"2026-09-16T10:31:17.474+00:00","modifiedAt":"2026-10-19T08:53:36.264+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/scsi/qla2xxx/qla_bsg.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"697a4bc69159c3396035b0506ffa55c4b2d0b1f4\",\n                            \"lessThan\": \"1c820d0900e4aacd5020b989159f6b4b2f7d0d6a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"697a4bc69159c3396035b0506ffa55c4b2d0b1f4\",\n                            \"lessThan\": \"26bc6a2c235a70bfc9b6de412600208aca820e20\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"697a4bc69159c3396035b0506ffa55c4b2d0b1f4\",\n                            \"lessThan\": \"5ab32dff910291b5e6bf6223f8a4003536c1800a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"697a4bc69159c3396035b0506ffa55c4b2d0b1f4\",\n                            \"lessThan\": \"947c6bfcf7f5ec924995bec43e3108b98c75b44e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"697a4bc69159c3396035b0506ffa55c4b2d0b1f4\",\n                            \"lessThan\": \"708c0ec1e09c52fee24b74ce9398bf3f8d1c83fd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"697a4bc69159c3396035b0506ffa55c4b2d0b1f4\",\n                            \"lessThan\": \"4fe5790674097897a1af1367d1e384f7e5a62fb7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"697a4bc69159c3396035b0506ffa55c4b2d0b1f4\",\n                            \"lessThan\": \"7881faf862ee301ecfe3adc0725bd2fa0021cd95\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"697a4bc69159c3396035b0506ffa55c4b2d0b1f4\",\n                            \"lessThan\": \"b93d3bb3afe1b44489927de1eb4e66e8536a5935\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/scsi/qla2xxx/qla_bsg.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.51\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.5\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/1c820d0900e4aacd5020b989159f6b4b2f7d0d6a","https://git.kernel.org/stable/c/26bc6a2c235a70bfc9b6de412600208aca820e20","https://git.kernel.org/stable/c/5ab32dff910291b5e6bf6223f8a4003536c1800a","https://git.kernel.org/stable/c/947c6bfcf7f5ec924995bec43e3108b98c75b44e","https://git.kernel.org/stable/c/708c0ec1e09c52fee24b74ce9398bf3f8d1c83fd","https://git.kernel.org/stable/c/4fe5790674097897a1af1367d1e384f7e5a62fb7","https://git.kernel.org/stable/c/7881faf862ee301ecfe3adc0725bd2fa0021cd95","https://git.kernel.org/stable/c/b93d3bb3afe1b44489927de1eb4e66e8536a5935"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89843","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89843","identifiers":["CVE-2026-89843"]},"retained":false,"historicalAffected":[]}],"coverage":[]}