CVE-2026-89751
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
x86/tdx: Fix off-by-one in port I/O handling
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 03149948832a078f759022ed5b92e722d8d23c26 | affected | git | c6875423ad849ac234ab9812eb72f37ff8a490b4 | Unavailable | None listed |
| 03149948832a078f759022ed5b92e722d8d23c26 | affected | git | 220011fe95fc78b2bc2d7d43893bc73957a5c811 | Unavailable | None listed |
| 03149948832a078f759022ed5b92e722d8d23c26 | affected | git | 222b7005e4519f633b4cd666226256abbab46a1a | Unavailable | None listed |
| 03149948832a078f759022ed5b92e722d8d23c26 | affected | git | c4a22154870813d10aa0b4c734a574c726f9d4b0 | Unavailable | None listed |
| 03149948832a078f759022ed5b92e722d8d23c26 | affected | git | bb45f705c4440dd3c689328319b88dd28770bbb8 | Unavailable | None listed |
| 03149948832a078f759022ed5b92e722d8d23c26 | affected | git | 0f63e656b1c679d32ac595de29d10c03efca6a25 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.19 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.19 | Unavailable | None listed |
| 6.1.188 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.157 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.109 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.50 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.4 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |