CVE-2026-89751
Severity not reportedData quality: partial.
Some fields were not provided by the source.
In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Fix off-by-one in port I/O handling handle_in() and handle_out() in arch/x86/coc…
In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Fix off-by-one in port I/O handling handle_in() and handle_out() in arch/x86/coco/tdx/tdx.c use: u64 mask = GENMASK(BITS_PER_BYTE * size, 0); GENMASK(h, l) includes bit h. For size=1 (INB), this produces GENMASK(8, 0) = 0x1FF (9 bits) instead of GENMASK(7, 0) = 0xFF (8 bits). The mask is one bit too wide for all I/O sizes. Fix the mask calculation.
CVSS
—
Awaiting analysis by NVD
Timeline (UTC)
Published: 2026-09-11 20:20
Modified: 2026-10-19 09:18
NVD status: Received
Last synced 1 day ago
Verified against the source API 2026-10-27 06:52 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://git.kernel.org/stable/c/0f63e656b1c679d32ac595de29d10c03efca6a25 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/220011fe95fc78b2bc2d7d43893bc73957a5c811 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/222b7005e4519f633b4cd666226256abbab46a1a 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/bb45f705c4440dd3c689328319b88dd28770bbb8 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/c4a22154870813d10aa0b4c734a574c726f9d4b0 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/c6875423ad849ac234ab9812eb72f37ff8a490b4 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:52 UTC · record ↗