{"id":"CVE-2026-89864","revision":"e5b37fbacb694404a1d81159490bf4e7","records":[{"revision":"e5b37fbacb694404a1d81159490bf4e7","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89864","aliases":[],"title":"scsi: qla2xxx: Bound i2c->length in I2C bsg handlers","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Bound i2c->length in I2C bsg handlers\n\nstruct qla_i2c_access carries a 16-bit length field alongside a fixed\n64-byte buffer:\n\n\tstruct qla_i2c_access {\n\t\tuint16_t device, offset, option, length;\n\t\tuint8_t  buffer[0x40];\n\t} __packed;\n\nqla2x00_write_i2c() and qla2x00_read_i2c() use the user-supplied\ni2c->length without any bounds check. i2c is overlaid on a 256-byte\non-stack buffer and sfp is a 256-byte DMA-pool buffer, so a length up to\n65535 overruns both:\n\n  - write: memcpy(sfp, i2c->buffer, i2c->length) over-reads the stack and\n    over-writes the sfp heap buffer, and qla2x00_write_sfp() then DMAs\n    i2c->length bytes out of the 256-byte buffer.\n  - read: qla2x00_read_sfp() DMAs i2c->length bytes into the 256-byte sfp,\n    then memcpy(i2c->buffer, sfp, i2c->length) overflows the 64-byte\n    buffer inside the on-stack array.\n\nA caller holding CAP_SYS_RAWIO can use this to corrupt the heap and the\nkernel stack. Reject requests whose length exceeds the buffer before any\ncopy or DMA transfer in both handlers.","state":0,"publishedAt":"2026-09-16T10:31:35.068+00:00","modifiedAt":"2026-10-19T08:53:57.594+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\": \"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae\",\n                            \"lessThan\": \"8f01f886cc5e7bbc16cbf1a9928fdebbc911e973\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae\",\n                            \"lessThan\": \"2be39946abcde5a6416fb074ef728429e246a996\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae\",\n                            \"lessThan\": \"522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae\",\n                            \"lessThan\": \"9a756f277eb89f769dbf380f38245c270d31fdb5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae\",\n                            \"lessThan\": \"32d6df14fdab71fe1ba304fd9a0db0411ea2e043\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae\",\n                            \"lessThan\": \"97ca58b0fb026799b99e3d552d5f69cf9a3113ad\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae\",\n                            \"lessThan\": \"47049fdadc0eaa115e813735b827e1379c0d2cf8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae\",\n                            \"lessThan\": \"0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59\",\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\": \"3.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.7\",\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/8f01f886cc5e7bbc16cbf1a9928fdebbc911e973","https://git.kernel.org/stable/c/2be39946abcde5a6416fb074ef728429e246a996","https://git.kernel.org/stable/c/522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e","https://git.kernel.org/stable/c/9a756f277eb89f769dbf380f38245c270d31fdb5","https://git.kernel.org/stable/c/32d6df14fdab71fe1ba304fd9a0db0411ea2e043","https://git.kernel.org/stable/c/97ca58b0fb026799b99e3d552d5f69cf9a3113ad","https://git.kernel.org/stable/c/47049fdadc0eaa115e813735b827e1379c0d2cf8","https://git.kernel.org/stable/c/0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89864","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89864","identifiers":["CVE-2026-89864"]},"retained":false,"historicalAffected":[]}],"coverage":[]}