{"id":"CVE-2026-89586","revision":"5d6cc9da4cb24fe5a1e17dfb8fe82ff4","records":[{"revision":"5d6cc9da4cb24fe5a1e17dfb8fe82ff4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89586","aliases":[],"title":"ata: libata-scsi: fix DSM TRIM for sector sizes larger than 2048 bytes","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nata: libata-scsi: fix DSM TRIM for sector sizes larger than 2048 bytes\n\nata_scsi_write_same_xlat() translates a SCSI WRITE SAME command with the\nUNMAP bit set into an ATA DATA SET MANAGEMENT TRIM command.  The TRIM\ndescriptor is built by ata_format_dsm_trim_descr() into the 2048-byte\nata_scsi_rbuf staging buffer, and the number of bytes copied is compared\nagainst the logical sector size by the caller:\n\n\tsize = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);\n\tif (size != len)\t\t/* len == sdp->sector_size */\n\t\tgoto invalid_param_len;\n\nata_format_dsm_trim_descr() clamps the copy length to ATA_SCSI_RBUF_SIZE\n(2048).  On a device whose logical sector size exceeds that (e.g. a 4Kn\ndevice, where sector_size == 4096) the function can never return more than\n2048, while the caller expects it to return sector_size.  The comparison\ntherefore always fails, so every TRIM is rejected with \"Parameter list\nlength error\" and WARN_ON() splats on each attempt.  TRIM / discard is\nthus completely broken on such devices.\n\nThe descriptor was incorrectly sized from the logical sector size.  A DSM\nTRIM payload is a list of 512-byte pages, each holding up to\nATA_MAX_TRIM_RNUM (64) LBA Range Entries, and is independent of the logical\nsector size.  The Block Limits VPD page already advertises a single such\npage as the maximum WRITE SAME length (65535 * ATA_MAX_TRIM_RNUM logical\nblocks), so the block layer never sends a request that needs more than one\npage.\n\nEmit exactly one 512-byte page, independent of the logical sector size,\nand transfer only that page (COUNT == 1).  For a 512-byte-sector device\nthis is unchanged; devices with larger logical sectors now work instead of\nfailing every TRIM.","state":0,"publishedAt":"2026-09-11T19:44:51.322+00:00","modifiedAt":"2026-10-19T08:49:18.983+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-scsi.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff\",\n                            \"lessThan\": \"07975b8daa3b0ab3cbc02cc48ea7bc48fadcec53\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff\",\n                            \"lessThan\": \"b7b5ab2df325ffbbad7ca2debaa071e024d68cb5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff\",\n                            \"lessThan\": \"07baa310ea3224a7044b1ca84796bb37a235af1f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff\",\n                            \"lessThan\": \"977554ed91b54075fbc0bac536316b4841ef6258\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff\",\n                            \"lessThan\": \"04e2befe25792f2e90097f284d7e86fc6bcfe928\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff\",\n                            \"lessThan\": \"c2e3dccd6870659851eaa4c12ab16418b8e3040a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff\",\n                            \"lessThan\": \"4a4268a0b0a595bd9534cf9c7fda93775a7d8a0d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ef2d7392c4ece5c3cd12a6c7ca9366cd8f189aff\",\n                            \"lessThan\": \"79cce911e623c0baa0fde307ce3a434e084b881a\",\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-scsi.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.9\",\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\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\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":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","score":8.2,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/07975b8daa3b0ab3cbc02cc48ea7bc48fadcec53","https://git.kernel.org/stable/c/b7b5ab2df325ffbbad7ca2debaa071e024d68cb5","https://git.kernel.org/stable/c/07baa310ea3224a7044b1ca84796bb37a235af1f","https://git.kernel.org/stable/c/977554ed91b54075fbc0bac536316b4841ef6258","https://git.kernel.org/stable/c/04e2befe25792f2e90097f284d7e86fc6bcfe928","https://git.kernel.org/stable/c/c2e3dccd6870659851eaa4c12ab16418b8e3040a","https://git.kernel.org/stable/c/4a4268a0b0a595bd9534cf9c7fda93775a7d8a0d","https://git.kernel.org/stable/c/79cce911e623c0baa0fde307ce3a434e084b881a"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89586","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89586","identifiers":["CVE-2026-89586"]},"retained":false,"historicalAffected":[]}],"coverage":[]}