{"id":"CVE-2025-21738","revision":"88330508ef9d491b875c307ffe538ec5","records":[{"revision":"88330508ef9d491b875c307ffe538ec5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-21738","aliases":[],"title":"ata: libata-sff: Ensure that we cannot write outside the allocated buffer","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nata: libata-sff: Ensure that we cannot write outside the allocated buffer\n\nreveliofuzzing reported that a SCSI_IOCTL_SEND_COMMAND ioctl with out_len\nset to 0xd42, SCSI command set to ATA_16 PASS-THROUGH, ATA command set to\nATA_NOP, and protocol set to ATA_PROT_PIO, can cause ata_pio_sector() to\nwrite outside the allocated buffer, overwriting random memory.\n\nWhile a ATA device is supposed to abort a ATA_NOP command, there does seem\nto be a bug either in libata-sff or QEMU, where either this status is not\nset, or the status is cleared before read by ata_sff_hsm_move().\nAnyway, that is most likely a separate bug.\n\nLooking at __atapi_pio_bytes(), it already has a safety check to ensure\nthat __atapi_pio_bytes() cannot write outside the allocated buffer.\n\nAdd a similar check to ata_pio_sector(), such that also ata_pio_sector()\ncannot write outside the allocated buffer.","state":0,"publishedAt":"2025-02-27T02:12:13.942+00:00","modifiedAt":"2026-10-15T01:03:54.067+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/ata/libata-sff.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5a5dbd18a7496ed403f6f54bb20c955c65482fa5\",\n                            \"lessThan\": \"a8f8cf87059ed1905c2a5c72f8b39a4f57b11b4c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5a5dbd18a7496ed403f6f54bb20c955c65482fa5\",\n                            \"lessThan\": \"d5e6e3000309359eae2a17117aa6e3c44897bf6c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5a5dbd18a7496ed403f6f54bb20c955c65482fa5\",\n                            \"lessThan\": \"0dd5aade301a10f4b329fa7454fdcc2518741902\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5a5dbd18a7496ed403f6f54bb20c955c65482fa5\",\n                            \"lessThan\": \"0a17a9944b8d89ef03946121241870ac53ddaf45\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5a5dbd18a7496ed403f6f54bb20c955c65482fa5\",\n                            \"lessThan\": \"6e74e53b34b6dec5a50e1404e2680852ec6768d2\",\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/ata/libata-sff.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.22\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.22\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.129\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.78\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.14\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.13.3\",\n                            \"lessThanOrEqual\": \"6.13.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.14\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/a8f8cf87059ed1905c2a5c72f8b39a4f57b11b4c","https://git.kernel.org/stable/c/d5e6e3000309359eae2a17117aa6e3c44897bf6c","https://git.kernel.org/stable/c/0dd5aade301a10f4b329fa7454fdcc2518741902","https://git.kernel.org/stable/c/0a17a9944b8d89ef03946121241870ac53ddaf45","https://git.kernel.org/stable/c/6e74e53b34b6dec5a50e1404e2680852ec6768d2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-21738","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-21738","identifiers":["CVE-2025-21738"]},"retained":false,"historicalAffected":[]}],"coverage":[]}