{"id":"CVE-2026-98545","state":"PUBLISHED","title":"ata: libata-scsi: bound the ATA passthru sense descriptor writes","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nata: libata-scsi: bound the ATA passthru sense descriptor writes\n\nWhen an ATA PASS-THROUGH command to an ATAPI device fails, the sense\nbuffer holds the device's REQUEST SENSE reply, and\nata_scsi_set_passthru_sense_fields() trusts its additional length\nbyte, sb[7], when adding the ATA Status Return descriptor.  A faulty\nor malicious device can use that to make the kernel read and write\npast the 96-byte buffer in three ways:\n\n- scsi_sense_desc_find() is passed sb[7] + 8 as the buffer length, so\n  its clamp against sb[7] does nothing and the walk runs off the end.\n- A type-9 descriptor found near the end is filled in unchecked.\n- A new descriptor at sb[8 + len] needs len + 22 bytes, not len + 14,\n  so len 75..82 writes up to 8 bytes past the end.\n\nReproduced with KASAN under qemu, with the emulated ATAPI REQUEST SENSE\nreply patched:\n\n  BUG: KASAN: slab-out-of-bounds in scsi_sense_desc_find+0x1a5/0x210\n  BUG: KASAN: slab-out-of-bounds in ata_scsi_qc_complete+0x1a15/0x1a50\n\nBoth are gone with this patch, and a valid descriptor is still filled\nin.","publishedAt":"2026-10-18T15:18:13.949Z","updatedAt":"2026-10-19T09:21:28.453Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ce477199c53e3db5a096981c565e232498ddeae4","status":"affected","lessThan":"c698f6deabf680f8f4a1727ef2dc80fe78815fbf","versionType":"git"},{"version":"97981926224afe17ba3e22e0c2b7dd8b516ee574","status":"affected","lessThan":"d9a7147b93624660626cd7c3b1143715699e1f5c","versionType":"git"},{"version":"97981926224afe17ba3e22e0c2b7dd8b516ee574","status":"affected","lessThan":"1603abb0c50420e97cf4a1feddbd5e183c5fdf86","versionType":"git"},{"version":"97981926224afe17ba3e22e0c2b7dd8b516ee574","status":"affected","lessThan":"80fbb0bc4d11683c88f2f9d3997ea02fcada5408","versionType":"git"},{"version":"97981926224afe17ba3e22e0c2b7dd8b516ee574","status":"affected","lessThan":"80320b278fea07ffcda3f57b67b61658e0a4e1ca","versionType":"git"},{"version":"67d9d0b6ae4aaf2c4cef103a96a145c7fdfb15f8","status":"affected","versionType":"git"},{"version":"6.6.44","status":"affected","lessThan":"6.6.158","versionType":"semver"},{"version":"6.10.3","status":"affected","lessThan":"6.11","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/ata/libata-scsi.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.11","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/ata/libata-scsi.c"]}],"references":["https://git.kernel.org/stable/c/c698f6deabf680f8f4a1727ef2dc80fe78815fbf","https://git.kernel.org/stable/c/d9a7147b93624660626cd7c3b1143715699e1f5c","https://git.kernel.org/stable/c/1603abb0c50420e97cf4a1feddbd5e183c5fdf86","https://git.kernel.org/stable/c/80fbb0bc4d11683c88f2f9d3997ea02fcada5408","https://git.kernel.org/stable/c/80320b278fea07ffcda3f57b67b61658e0a4e1ca"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98545.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98545","state":"PUBLISHED","datePublished":"2026-10-18T15:18:13.949Z","dateUpdated":"2026-10-19T09:21:28.453Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.356Z"},"containers":{"cna":{"title":"ata: libata-scsi: bound the ATA passthru sense descriptor writes","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nata: libata-scsi: bound the ATA passthru sense descriptor writes\n\nWhen an ATA PASS-THROUGH command to an ATAPI device fails, the sense\nbuffer holds the device's REQUEST SENSE reply, and\nata_scsi_set_passthru_sense_fields() trusts its additional length\nbyte, sb[7], when adding the ATA Status Return descriptor.  A faulty\nor malicious device can use that to make the kernel read and write\npast the 96-byte buffer in three ways:\n\n- scsi_sense_desc_find() is passed sb[7] + 8 as the buffer length, so\n  its clamp against sb[7] does nothing and the walk runs off the end.\n- A type-9 descriptor found near the end is filled in unchecked.\n- A new descriptor at sb[8 + len] needs len + 22 bytes, not len + 14,\n  so len 75..82 writes up to 8 bytes past the end.\n\nReproduced with KASAN under qemu, with the emulated ATAPI REQUEST SENSE\nreply patched:\n\n  BUG: KASAN: slab-out-of-bounds in scsi_sense_desc_find+0x1a5/0x210\n  BUG: KASAN: slab-out-of-bounds in ata_scsi_qc_complete+0x1a15/0x1a50\n\nBoth are gone with this patch, and a valid descriptor is still filled\nin."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ce477199c53e3db5a096981c565e232498ddeae4","status":"affected","lessThan":"c698f6deabf680f8f4a1727ef2dc80fe78815fbf","versionType":"git"},{"version":"97981926224afe17ba3e22e0c2b7dd8b516ee574","status":"affected","lessThan":"d9a7147b93624660626cd7c3b1143715699e1f5c","versionType":"git"},{"version":"97981926224afe17ba3e22e0c2b7dd8b516ee574","status":"affected","lessThan":"1603abb0c50420e97cf4a1feddbd5e183c5fdf86","versionType":"git"},{"version":"97981926224afe17ba3e22e0c2b7dd8b516ee574","status":"affected","lessThan":"80fbb0bc4d11683c88f2f9d3997ea02fcada5408","versionType":"git"},{"version":"97981926224afe17ba3e22e0c2b7dd8b516ee574","status":"affected","lessThan":"80320b278fea07ffcda3f57b67b61658e0a4e1ca","versionType":"git"},{"version":"67d9d0b6ae4aaf2c4cef103a96a145c7fdfb15f8","status":"affected","versionType":"git"},{"version":"6.6.44","status":"affected","lessThan":"6.6.158","versionType":"semver"},{"version":"6.10.3","status":"affected","lessThan":"6.11","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/ata/libata-scsi.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.11","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/ata/libata-scsi.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c698f6deabf680f8f4a1727ef2dc80fe78815fbf"},{"url":"https://git.kernel.org/stable/c/d9a7147b93624660626cd7c3b1143715699e1f5c"},{"url":"https://git.kernel.org/stable/c/1603abb0c50420e97cf4a1feddbd5e183c5fdf86"},{"url":"https://git.kernel.org/stable/c/80fbb0bc4d11683c88f2f9d3997ea02fcada5408"},{"url":"https://git.kernel.org/stable/c/80320b278fea07ffcda3f57b67b61658e0a4e1ca"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:21:28.453Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.44","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.18.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}