{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8b515be512a2435bb8aedc6390cbe140167f9eb9"
            },
            {
              "fixed": "276bd7ed34d56c48c65c43c0b08f2ee77029b2fa"
            },
            {
              "fixed": "f9bcff265556796834122f95de16d52a8375206c"
            },
            {
              "fixed": "17e01e342af74de12899c206dcc9ec90684703aa"
            },
            {
              "fixed": "152fcb74a26804b70909381c6acc90595a0ae1c1"
            },
            {
              "fixed": "6a917199aaf97904f5619afe3dfdacb155b03e8c"
            },
            {
              "fixed": "32e3d364a7b8295120d37e6a6bd433d2de26f748"
            },
            {
              "fixed": "4699b54fada156534cbb39834d47fc9374d7a1f5"
            },
            {
              "fixed": "74186c2968f8f756ac3226b545b598457c910c75"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "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"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80555.json"
  },
  "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.",
  "id": "CVE-2026-80555",
  "modified": "2026-08-28T03:30:46.827580513Z",
  "published": "2026-08-26T14:37:22.969Z",
  "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"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "s390/vfio_ccw: Free all memory if cp_init() fails"
}