{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b66f723bb552ad59c2acb5d45ea45c890f84498b"
            },
            {
              "fixed": "e54229ecf49add8451d5f765a32c86ab4446e06c"
            },
            {
              "fixed": "da6f5bbc2e7902f578b503f2a4c3d8d09ca4b102"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "2f8623377f3e0cfaa80558631b8694d02a492b4c"
            },
            {
              "last_affected": "c713ebf2fe3f469e4af4de60a3427689ffb7c5d7"
            },
            {
              "last_affected": "c2191e507147b1a22e9170ebb2aaa0f2902fcbfa"
            },
            {
              "last_affected": "9fc32dad3cdba18669c71893f3e6d96905b39b3f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.10.173"
            },
            {
              "fixed": "5.11"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.15.99"
            },
            {
              "fixed": "5.16"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.1.16"
            },
            {
              "fixed": "6.2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.2.3"
            },
            {
              "fixed": "6.3"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.3.0"
            },
            {
              "fixed": "6.19.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45961.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ngfs2: fix memory leaks in gfs2_fill_super error path\n\nFix two memory leaks in the gfs2_fill_super() error handling path when\ntransitioning a filesystem to read-write mode fails.\n\nFirst leak: kthread objects (thread_struct, task_struct, etc.)\nWhen gfs2_freeze_lock_shared() fails after init_threads() succeeds, the\ncreated kernel threads (logd and quotad) are never destroyed. This\noccurs because the fail_per_node label doesn't call\ngfs2_destroy_threads().\n\nSecond leak: quota bitmap buffer (8192 bytes)\nWhen gfs2_make_fs_rw() fails after gfs2_quota_init() succeeds but\nbefore other operations complete, the allocated quota bitmap is never\nfreed.\n\nThe fix moves thread cleanup to the fail_per_node label to handle all\nerror paths uniformly. gfs2_destroy_threads() is safe to call\nunconditionally as it checks for NULL pointers. Quota cleanup is added\nin gfs2_make_fs_rw() to properly handle the withdrawal case where\nquota initialization succeeds but the filesystem is then withdrawn.\n\nThread leak backtrace (gfs2_freeze_lock_shared failure):\n  unreferenced object 0xffff88801d7bca80 (size 4480):\n    copy_process+0x3a1/0x4670 kernel/fork.c:2422\n    kernel_clone+0xf3/0x6e0 kernel/fork.c:2779\n    kthread_create_on_node+0x100/0x150 kernel/kthread.c:478\n    init_threads+0xab/0x350 fs/gfs2/ops_fstype.c:611\n    gfs2_fill_super+0xe5c/0x1240 fs/gfs2/ops_fstype.c:1265\n\nQuota leak backtrace (gfs2_make_fs_rw failure):\n  unreferenced object 0xffff88812de7c000 (size 8192):\n    gfs2_quota_init+0xe5/0x820 fs/gfs2/quota.c:1409\n    gfs2_make_fs_rw+0x7a/0xe0 fs/gfs2/super.c:149\n    gfs2_fill_super+0xfbb/0x1240 fs/gfs2/ops_fstype.c:1275",
  "id": "CVE-2026-45961",
  "modified": "2026-07-08T05:36:46.617186130Z",
  "published": "2026-05-27T12:18:17.637Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/da6f5bbc2e7902f578b503f2a4c3d8d09ca4b102"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e54229ecf49add8451d5f765a32c86ab4446e06c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45961.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45961"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "gfs2: fix memory leaks in gfs2_fill_super error path"
}