{"id":"CVE-2026-80555","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-80555","summary":"s390/vfio_ccw: Free all memory if cp_init() fails","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/vfio_ccw: Free all memory if cp_init() fails\n\nThe routine cp_free() is called to unpin/free any memory once an I/O\nis completed successfully, or if cp_prefetch() fails. But if cp_init()\nfails, and cp->initialized is not enabled, the same routine cannot be\nused to free all the memory.\n\nAn attempt to address this exists in ccwchain_handle_ccw(), where a\nsingle call to ccwchain_free() is made for the currently-processed\nCCW segment. But this will leak other segments (created as a result\nof a Transfer in Channel) that had been allocated as part of the same\nchannel program.\n\nAddress this by performing the cleanup outside of the recursive\nccwchain_handle_ccw()/ccwchain_loop_tic() logic.","published":"2026-08-26T14:37:22.969Z","modified":"2026-08-28T03:47:29.018331138Z","cvss":{"score":7.1,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"5.10.267"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/152fcb74a26804b70909381c6acc90595a0ae1c1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/17e01e342af74de12899c206dcc9ec90684703aa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/276bd7ed34d56c48c65c43c0b08f2ee77029b2fa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/32e3d364a7b8295120d37e6a6bd433d2de26f748"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4699b54fada156534cbb39834d47fc9374d7a1f5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6a917199aaf97904f5619afe3dfdacb155b03e8c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/74186c2968f8f756ac3226b545b598457c910c75"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f9bcff265556796834122f95de16d52a8375206c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80555.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80555"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-28T03:47:29.018331138Z"}}