CVE-2026-80555

{"id": "CVE-2026-80555", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 2.5}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "8b515be512a2435bb8aedc6390cbe140167f9eb9", "lessThan": "276bd7ed34d56c48c65c43c0b08f2ee77029b2fa", "versionType": "git"}, {"status": "affected", "version": "8b515be512a2435bb8aedc6390cbe140167f9eb9", "lessThan": "f9bcff265556796834122f95de16d52a8375206c", "versionType": "git"}, {"status": "affected", "version": "8b515be512a2435bb8aedc6390cbe140167f9eb9", "lessThan": "17e01e342af74de12899c206dcc9ec90684703aa", "versionType": "git"}, {"status": "affected", "version": "8b515be512a2435bb8aedc6390cbe140167f9eb9", "lessThan": "152fcb74a26804b70909381c6acc90595a0ae1c1", "versionType": "git"}, {"status": "affected", "version": "8b515be512a2435bb8aedc6390cbe140167f9eb9", "lessThan": "6a917199aaf97904f5619afe3dfdacb155b03e8c", "versionType": "git"}, {"status": "affected", "version": "8b515be512a2435bb8aedc6390cbe140167f9eb9", "lessThan": "32e3d364a7b8295120d37e6a6bd433d2de26f748", "versionType": "git"}, {"status": "affected", "version": "8b515be512a2435bb8aedc6390cbe140167f9eb9", "lessThan": "4699b54fada156534cbb39834d47fc9374d7a1f5", "versionType": "git"}, {"status": "affected", "version": "8b515be512a2435bb8aedc6390cbe140167f9eb9", "lessThan": "74186c2968f8f756ac3226b545b598457c910c75", "versionType": "git"}], "programFiles": ["drivers/s390/cio/vfio_ccw_cp.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.3"}, {"status": "unaffected", "version": "0", "lessThan": "5.3", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.267", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.218", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.185", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.154", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.105", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.46", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.10", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/s390/cio/vfio_ccw_cp.c"], "defaultStatus": "affected"}]}], "published": "2026-08-26T15:17:10.130", "references": [{"url": "https://git.kernel.org/stable/c/152fcb74a26804b70909381c6acc90595a0ae1c1", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/17e01e342af74de12899c206dcc9ec90684703aa", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/276bd7ed34d56c48c65c43c0b08f2ee77029b2fa", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/32e3d364a7b8295120d37e6a6bd433d2de26f748", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4699b54fada156534cbb39834d47fc9374d7a1f5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6a917199aaf97904f5619afe3dfdacb155b03e8c", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/74186c2968f8f756ac3226b545b598457c910c75", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f9bcff265556796834122f95de16d52a8375206c", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-08-27T13:18:40.193", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}