CVE-2026-63897
Published: July 22, 2026Last modified: July 22, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: USB: serial: mct_u232: fix missing interrupt-in transfer sanity check Add the missing sanity check on the size of interrupt-in transfers to avoid parsing stale or uninitialised slab data (and leaking it to user space).
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.177-r0) |
| 25 LTS | linux-lts | Fixed (6.12.95-r0) | |
| Stream | linux-lts | Fixed (6.18.35-r1) |
References
- https://git.kernel.org/stable/c/245aba83e3c288e176ed037a1f6b618b09e92ed8
- https://git.kernel.org/stable/c/631b8b7c456567f7a8d26f6fc354c8dd9cc9f832
- https://git.kernel.org/stable/c/70bb9a2661d34b93a9b83cf83e2b76289a712ef0
- https://git.kernel.org/stable/c/82b48d70bced1ec8e5f676d1fd5eccc7a44dc418
- https://git.kernel.org/stable/c/8b93ee5baeef6efabee2c3381907733ad2dbc883
- https://git.kernel.org/stable/c/a093f3e0c03d25a86d747a655d4b9322ffb2ed87
- https://git.kernel.org/stable/c/ed260b56bc9fc878e5dcbb866eab8af0688e0e67
- https://git.kernel.org/stable/c/f06bcaba29707f060706483b2020d3cafbe98f9f