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CVE-2026-97441

UnknownEPSS 0.17%

Last modified

CVE-2026-97441 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

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]

Metrics

EPSS Probability
0.17%

5.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 533a08ea11217100cec7a0ed903cb9b9c892d6f1; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < c717b20100ef8cd06b5237af70ea2cb692e058ce; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ff0ab535f8febbd32afa5832f8d2d9b06a8d5060; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 6d29b91164424256a759ddabc8f2de1ae09bd3f1; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < df262c828b616450eb351349e91c63447551bd01; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f2e291043c37a896d7f9797e25a356dceb030177; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < c4086c6e1af757e1ff26fa2d2926b3ec0195de79
LinuxLinux2.6.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-97441?
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]
How severe is CVE-2026-97441?
Severity scoring for CVE-2026-97441 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-97441?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST