{"id":"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-\u003einitialized 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.","modified":"2026-08-28T03:47:29.018331138Z","published":"2026-08-26T14:37:22.969Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80555.json","cna_assigner":"Linux"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"8b515be512a2435bb8aedc6390cbe140167f9eb9"},{"fixed":"276bd7ed34d56c48c65c43c0b08f2ee77029b2fa"},{"fixed":"f9bcff265556796834122f95de16d52a8375206c"},{"fixed":"17e01e342af74de12899c206dcc9ec90684703aa"},{"fixed":"152fcb74a26804b70909381c6acc90595a0ae1c1"},{"fixed":"6a917199aaf97904f5619afe3dfdacb155b03e8c"},{"fixed":"32e3d364a7b8295120d37e6a6bd433d2de26f748"},{"fixed":"4699b54fada156534cbb39834d47fc9374d7a1f5"},{"fixed":"74186c2968f8f756ac3226b545b598457c910c75"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80555.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.3.0"},{"fixed":"5.10.267"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.218"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.185"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.154"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.105"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.46"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80555.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"}]}