CVE-2026-89751Medium· 5.5▾ SunlitIn 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,…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 4.7
none → medium
— → 4.7
none → medium
— → 4.7
none → medium
4.7 → 5.5
0.2% → 0.2%
Last analysed / modified upstream
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.
Linux >= 03149948832a078f759022ed5b92e722d8d23c26 < c6875423ad849ac234ab9812eb72f37ff8a490b4Linux >= 03149948832a078f759022ed5b92e722d8d23c26 < 220011fe95fc78b2bc2d7d43893bc73957a5c811Linux >= 03149948832a078f759022ed5b92e722d8d23c26 < 222b7005e4519f633b4cd666226256abbab46a1aLinux >= 03149948832a078f759022ed5b92e722d8d23c26 < c4a22154870813d10aa0b4c734a574c726f9d4b0Linux >= 03149948832a078f759022ed5b92e722d8d23c26 < bb45f705c4440dd3c689328319b88dd28770bbb8Linux >= 03149948832a078f759022ed5b92e722d8d23c26 < 0f63e656b1c679d32ac595de29d10c03efca6a25Linux 5.19Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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