{"id":"CVE-2026-97441","published":"2026-09-24T17:17:22.313","lastModified":"2026-09-25T13:17:27.777","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nata: ahci: fail probe if BAR too small for claimed ports\n\nWhen an AHCI controller is disabled in BIOS, its HOST_CAP register may\ncontain a bogus value, e.g. 0xFFFFFFFF.\n\nSince CAP.NP (Number of Ports) is a zeroes based 5-bit register field,\na value of 0x1f means 32 ports. If CAP.NP claims more ports than can\nphysically fit within the mapped BAR region, accessing port registers\nbeyond the BAR boundary causes a kernel panic.\n\nAdd validation in ahci_init_one() to check that the BAR size is\nsufficient for the number of ports claimed in CAP.NP. The check\ncalculates the required MMIO size as:\n\n  required_size = 0x100 (global registers) + max_ports * 0x80\n\nIf required_size exceeds the actual BAR size, the probe fails with\n-ENODEV, preventing the panic and providing a clear error message.\n\n[cassel: commit log]","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/c4086c6e1af757e1ff26fa2d2926b3ec0195de79","tags":[]},{"url":"https://git.kernel.org/stable/c/df262c828b616450eb351349e91c63447551bd01","tags":[]},{"url":"https://git.kernel.org/stable/c/f2e291043c37a896d7f9797e25a356dceb030177","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}