Answer in brief
CVE-2026-80555 records a High severity (CVSS 7.1) vulnerability in s390/vfio_ccw: Free all memory if cp_init() fails. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8b515be512a2435bb8aedc6390cbe140167f9eb9 <6a917199aaf97904f5619afe3dfdacb155b03e8c || >=8b515be512a2435bb8aedc6390cbe140167f9eb9 <32e3d364a7b8295120d37e6a6bd433d2de26f748 || >=8b515be512a2435bb8aedc6390cbe140167f9eb9 <4699b54fada156534cbb39834d47fc9374d7a1f5 || >=8b515be512a2435bb8aedc6390cbe140167f9eb9 <74186c2968f8f756ac3226b545b598457c910c75 | 6a917199aaf97904f5619afe3dfdacb155b03e8c, 32e3d364a7b8295120d37e6a6bd433d2de26f748, 4699b54fada156534cbb39834d47fc9374d7a1f5, 74186c2968f8f756ac3226b545b598457c910c75 |
| Linux/Linuxgeneric | 5.3 | Not reported |
| Linux/Linuxgeneric | >=8b515be512a2435bb8aedc6390cbe140167f9eb9 <276bd7ed34d56c48c65c43c0b08f2ee77029b2fa || >=8b515be512a2435bb8aedc6390cbe140167f9eb9 <f9bcff265556796834122f95de16d52a8375206c || >=8b515be512a2435bb8aedc6390cbe140167f9eb9 <17e01e342af74de12899c206dcc9ec90684703aa || >=8b515be512a2435bb8aedc6390cbe140167f9eb9 <152fcb74a26804b70909381c6acc90595a0ae1c1 || >=8b515be512a2435bb8aedc6390cbe140167f9eb9 <6a917199aaf97904f5619afe3dfdacb155b03e8c || >=8b515be512a2435bb8aedc6390cbe140167f9eb9 <32e3d364a7b8295120d37e6a6bd433d2de26f748 || >=8b515be512a2435bb8aedc6390cbe140167f9eb9 <4699b54fada156534cbb39834d47fc9374d7a1f5 || >=8b515be512a2435bb8aedc6390cbe140167f9eb9 <74186c2968f8f756ac3226b545b598457c910c75 | 276bd7ed34d56c48c65c43c0b08f2ee77029b2fa, f9bcff265556796834122f95de16d52a8375206c, 17e01e342af74de12899c206dcc9ec90684703aa, 152fcb74a26804b70909381c6acc90595a0ae1c1, 6a917199aaf97904f5619afe3dfdacb155b03e8c, 32e3d364a7b8295120d37e6a6bd433d2de26f748, 4699b54fada156534cbb39834d47fc9374d7a1f5, 74186c2968f8f756ac3226b545b598457c910c75 |
Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 26, 2026
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.
Quoted source text, attributed separately from HOL analysis.