CVE-2026-80555
Published: September 3, 2026Last modified: September 3, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Free all memory if cp_init() fails The routine cp_free() is called to unpin/free any memory once an I/O is completed successfully, or if cp_prefetch() fails. But if cp_init() fails, and cp->initialized is not enabled, the same routine cannot be used to free all the memory. An attempt to address this exists in ccwchain_handle_ccw(), where a single call to ccwchain_free() is made for the currently-processed CCW segment. But this will leak other segments (created as a result of a Transfer in Channel) that had been allocated as part of the same channel program. Address this by performing the cleanup outside of the recursive ccwchain_handle_ccw()/ccwchain_loop_tic() logic.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.1 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | CHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Vulnerable (6.1.182-r0) |
| 25 LTS | linux-lts | Vulnerable (6.12.103-r0) | |
| Stream | linux-lts | Fixed (6.18.46-r0) |
References
- https://git.kernel.org/stable/c/152fcb74a26804b70909381c6acc90595a0ae1c1
- https://git.kernel.org/stable/c/17e01e342af74de12899c206dcc9ec90684703aa
- https://git.kernel.org/stable/c/276bd7ed34d56c48c65c43c0b08f2ee77029b2fa
- https://git.kernel.org/stable/c/32e3d364a7b8295120d37e6a6bd433d2de26f748
- https://git.kernel.org/stable/c/4699b54fada156534cbb39834d47fc9374d7a1f5
- https://git.kernel.org/stable/c/6a917199aaf97904f5619afe3dfdacb155b03e8c
- https://git.kernel.org/stable/c/74186c2968f8f756ac3226b545b598457c910c75
- https://git.kernel.org/stable/c/f9bcff265556796834122f95de16d52a8375206c