CVE-2026-98262
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
ata: libahci: clear PxCLBU and PxFBU for AHCI_HFLAG_32BIT_ONLY
In the Linux kernel, the following vulnerability has been resolved: ata: libahci: clear PxCLBU and PxFBU for AHCI_HFLAG_32BIT_ONLY A user reported that commit 105c42566a55 ("ata: ahci: force 32-bit DMA for JMicron JMB582/JMB585") made the JMicron JMB585 unusable on his board. The failure is seen as soon as the ahci driver is probed, and booting with iommu=off does not solve the problem. Looking at the AHCI specification, PxCLBU and PxFBU are both read only '0' for HBAs that do not support 64-bit addressing. For HBAs that do support 64-bit addressing, the registers are read write, with a reset value that is Implementation Specific. When using the AHCI_HFLAG_32BIT_ONLY flag, the HBA does support 64-bit addressing, and a 32-bit DMA mask is set by simply clearing HOST_CAP_64. Thus, in this case, we need to explicitly clear the registers to 0.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c | affected | git | 0191c9ff23ef1678dbfb5ad253a2dee92feb5d71 | Unavailable | None listed |
| c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c | affected | git | 8f510f68208a1f673d7c7234a687be4671490e9c | Unavailable | None listed |
| c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c | affected | git | 4719424bb7cb9f20b73986bcb72dd528f0e5c6eb | Unavailable | None listed |
| c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c | affected | git | a5a8b4737f68bbac8aa0685af0c8921e6003c22b | Unavailable | None listed |
| c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c | affected | git | b28a17d4a9bb0aa38b48681c3927b012ba40eabe | Unavailable | None listed |
| c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c | affected | git | b691a3e244278362e552439d6d3ee5a5d3703488 | Unavailable | None listed |
| c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c | affected | git | 7912ad8fb5233bb8cfe21d50df639c7f4854ff9d | Unavailable | None listed |
| c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c | affected | git | 82e47533221d4746947b74d2e79a478c36c6433a | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.22 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.22 | Unavailable | None listed |
| 5.10.271 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.222 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.189 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.158 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.112 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.54 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.8 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |