CVE-2026-97441ata: ahci: fail probe if BAR too small for claimed ports
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: ata: ahci: fail probe if BAR too small for claimed ports When an AHCI controller is disabled in BIOS, its HOST_CAP register may contain a bogus value, e.g. 0xFFFFFFFF. Since CAP.NP (Number of Ports) is a zeroes based 5-bit register field, a value of 0x1f means 32 ports. If CAP.NP claims more ports than can physically fit within the mapped BAR region, accessing port registers beyond the BAR boundary causes a kernel panic. Add validation in ahci_init_one() to check that the BAR size is sufficient for the number of ports claimed in CAP.NP. The check calculates the required MMIO size as: required_size = 0x100 (global registers) + max_ports * 0x80 If required_size exceeds the actual BAR size, the probe fails with -ENODEV, preventing the panic and providing a clear error message. [cassel: commit log]
Timeline
ID reserved
By Linux
Published
- 9 days later
· 9 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 533a08ea11217100cec7a0ed903cb9b9c892d6f1
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < c717b20100ef8cd06b5237af70ea2cb692e058ce
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < ff0ab535f8febbd32afa5832f8d2d9b06a8d5060
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 6d29b91164424256a759ddabc8f2de1ae09bd3f1
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < df262c828b616450eb351349e91c63447551bd01
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < f2e291043c37a896d7f9797e25a356dceb030177
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < c4086c6e1af757e1ff26fa2d2926b3ec0195de79
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 5.10.271 – ≤ 5.10.*
- unaffected 5.15.222 – ≤ 5.15.*
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.53 – ≤ 6.18.*
- unaffected 7.2 – ≤ *
References
References7
- https://git.kernel.org/stable/c/533a08ea11217100cec7a0ed903cb9b9c892d6f1 (opens in a new tab)
- https://git.kernel.org/stable/c/c717b20100ef8cd06b5237af70ea2cb692e058ce (opens in a new tab)
- https://git.kernel.org/stable/c/ff0ab535f8febbd32afa5832f8d2d9b06a8d5060 (opens in a new tab)
- https://git.kernel.org/stable/c/6d29b91164424256a759ddabc8f2de1ae09bd3f1 (opens in a new tab)
- https://git.kernel.org/stable/c/df262c828b616450eb351349e91c63447551bd01 (opens in a new tab)
- https://git.kernel.org/stable/c/f2e291043c37a896d7f9797e25a356dceb030177 (opens in a new tab)
- https://git.kernel.org/stable/c/c4086c6e1af757e1ff26fa2d2926b3ec0195de79 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-86054 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-97441)Record last updated .