{"schema":"threatline.record/2","record":{"id":"CVE-2026-98262","aliases":[],"summary":"ata: libahci: clear PxCLBU and PxFBU for AHCI_HFLAG_32BIT_ONLY","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nata: libahci: clear PxCLBU and PxFBU for AHCI_HFLAG_32BIT_ONLY\n\nA user reported that commit 105c42566a55 (\"ata: ahci: force 32-bit DMA for\nJMicron JMB582/JMB585\") made the JMicron JMB585 unusable on his board.\n\nThe failure is seen as soon as the ahci driver is probed, and booting with\niommu=off does not solve the problem.\n\nLooking at the AHCI specification, PxCLBU and PxFBU are both read only '0'\nfor HBAs that do not support 64-bit addressing.\n\nFor HBAs that do support 64-bit addressing, the registers are read write,\nwith a reset value that is Implementation Specific.\n\nWhen using the AHCI_HFLAG_32BIT_ONLY flag, the HBA does support 64-bit\naddressing, and a 32-bit DMA mask is set by simply clearing HOST_CAP_64.\nThus, in this case, we need to explicitly clear the registers to 0.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98262","source_modified_at":"2026-10-19T09:16:33.319Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c","lessThan":"0191c9ff23ef1678dbfb5ad253a2dee92feb5d71","status":"affected","versionType":"git"},{"version":"c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c","lessThan":"8f510f68208a1f673d7c7234a687be4671490e9c","status":"affected","versionType":"git"},{"version":"c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c","lessThan":"4719424bb7cb9f20b73986bcb72dd528f0e5c6eb","status":"affected","versionType":"git"},{"version":"c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c","lessThan":"a5a8b4737f68bbac8aa0685af0c8921e6003c22b","status":"affected","versionType":"git"},{"version":"c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c","lessThan":"b28a17d4a9bb0aa38b48681c3927b012ba40eabe","status":"affected","versionType":"git"},{"version":"c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c","lessThan":"b691a3e244278362e552439d6d3ee5a5d3703488","status":"affected","versionType":"git"},{"version":"c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c","lessThan":"7912ad8fb5233bb8cfe21d50df639c7f4854ff9d","status":"affected","versionType":"git"},{"version":"c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c","lessThan":"82e47533221d4746947b74d2e79a478c36c6433a","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98262","source_modified_at":"2026-10-19T09:16:33.319Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"2.6.22","status":"affected"},{"version":"0","lessThan":"2.6.22","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.54","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.8","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98262","source_modified_at":"2026-10-19T09:16:33.319Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0191c9ff23ef1678dbfb5ad253a2dee92feb5d71","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98262","source_modified_at":"2026-10-19T09:16:33.319Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8f510f68208a1f673d7c7234a687be4671490e9c","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98262","source_modified_at":"2026-10-19T09:16:33.319Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"4719424bb7cb9f20b73986bcb72dd528f0e5c6eb","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98262","source_modified_at":"2026-10-19T09:16:33.319Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"7912ad8fb5233bb8cfe21d50df639c7f4854ff9d","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98262","source_modified_at":"2026-10-19T09:16:33.319Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"82e47533221d4746947b74d2e79a478c36c6433a","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00184,"percentile":0.07611,"score_date":"2026-10-23"},"published_at":"2026-10-06T08:45:26.118Z","modified_at":"2026-10-19T09:16:33.319Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98262","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:16:33.319Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98262","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/0191c9ff23ef1678dbfb5ad253a2dee92feb5d71"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8f510f68208a1f673d7c7234a687be4671490e9c"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/4719424bb7cb9f20b73986bcb72dd528f0e5c6eb"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/a5a8b4737f68bbac8aa0685af0c8921e6003c22b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b28a17d4a9bb0aa38b48681c3927b012ba40eabe"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b691a3e244278362e552439d6d3ee5a5d3703488"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/7912ad8fb5233bb8cfe21d50df639c7f4854ff9d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/82e47533221d4746947b74d2e79a478c36c6433a"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:16:33.319Z","content_hash":"ad488b0a4e110c3b4c396557a864ac968bb86befae26d4e9c2a71f7b69d72ce3"}}