{"id":"CVE-2026-97441","title":"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","summary":"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.…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-125"],"vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 533a08ea11217100cec7a0ed903cb9b9c892d6f1","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c717b20100ef8cd06b5237af70ea2cb692e058ce","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ff0ab535f8febbd32afa5832f8d2d9b06a8d5060","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6d29b91164424256a759ddabc8f2de1ae09bd3f1","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < df262c828b616450eb351349e91c63447551bd01","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f2e291043c37a896d7f9797e25a356dceb030177","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c4086c6e1af757e1ff26fa2d2926b3ec0195de79","Linux 2.6.12"],"published":"2026-09-24","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:17:55.757","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97441","references":[{"url":"https://git.kernel.org/stable/c/533a08ea11217100cec7a0ed903cb9b9c892d6f1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6d29b91164424256a759ddabc8f2de1ae09bd3f1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c4086c6e1af757e1ff26fa2d2926b3ec0195de79","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c717b20100ef8cd06b5237af70ea2cb692e058ce","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/df262c828b616450eb351349e91c63447551bd01","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f2e291043c37a896d7f9797e25a356dceb030177","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ff0ab535f8febbd32afa5832f8d2d9b06a8d5060","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97441.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-97441"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2540552"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97441"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97441"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97441.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00173,"epssPercentile":0.06619,"cvssSource":"vendor","ingestedAt":"2026-09-24T16:47:15.878Z","slug":"CVE-2026-97441","body":"## Overview\n\nIn 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]\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-29 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97441.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":213550,"id":"CVE-2026-97441","ts":1790754772983,"field":"cvss","old":null,"new":"5.5"},{"seq":213549,"id":"CVE-2026-97441","ts":1790754772983,"field":"severity","old":"none","new":"medium"}]}