{"id":"CVE-2026-45961","summary":"gfs2: fix memory leaks in gfs2_fill_super error path","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to properly handle the withdrawal case where\nquota initialization succeeds but the filesystem is then withdrawn.\n\nThread leak backtrace (gfs2_freeze_lock_shared failure):\n  unreferenced object 0xffff88801d7bca80 (size 4480):\n    copy_process+0x3a1/0x4670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","modified":"2026-07-09T10:14:50.040273846Z","published":"2026-05-27T12:18:17.637Z","related":["SUSE-SU-2026:22433-1","SUSE-SU-2026:22436-1","SUSE-SU-2026:22458-1","SUSE-SU-2026:22460-1","SUSE-SU-2026:2722-1","SUSE-SU-2026:2799-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45961.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b66f723bb552ad59c2acb5d45ea45c890f84498b"},{"fixed":"e54229ecf49add8451d5f765a32c86ab4446e06c"},{"fixed":"da6f5bbc2e7902f578b503f2a4c3d8d09ca4b102"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"2f8623377f3e0cfaa80558631b8694d02a492b4c"},{"last_affected":"c713ebf2fe3f469e4af4de60a3427689ffb7c5d7"},{"last_affected":"c2191e507147b1a22e9170ebb2aaa0f2902fcbfa"},{"last_affected":"9fc32dad3cdba18669c71893f3e6d96905b39b3f"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.10.173"},{"fixed":"5.11"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.15.99"},{"fixed":"5.16"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.1.16"},{"fixed":"6.2"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.2.3"},{"fixed":"6.3"}]}],"versions":["v6.2-rc6","v5.10.172","v5.15.98","v6.1.15","v6.2.2","v6.2-rc1","v6.2","v5.15.97","v5.10.171","v6.2.1","v6.1.14","v5.15.96","v5.10.170","v5.15.95","v5.10.169","v6.1.13","v6.2-rc2","v6.2-rc8","v6.1.12","v5.15.94","v5.10.168","v6.2-rc5","v6.2-rc4","v5.10.167","v5.15.93","v6.1.11","v6.2-rc7","v6.1.10","v5.15.92","v6.2-rc3","v6.1.9","v5.15.91","v5.10.166","v6.1.8","v5.15.90","v5.10.165","v6.1.7","v5.15.89","v5.10.164","v6.1.6","v5.15.88","v5.10.163","v6.1-rc1","v6.1.5","v5.15.87","v5.10.162","v6.1.4","v5.15.86","v6.1.3","v5.10.161","v6.1.2","v6.1.1","v5.15.85","v6.1","v5.15.84","v5.10.160","v5.15.83","v5.10.159","v6.1-rc8","v6.1-rc3","v5.15.82","v5.10.158","v6.1-rc6","v5.15.81","v5.10.157","v6.1-rc7","v6.1-rc4","v6.1-rc2","v5.15.80","v5.10.156","v5.15.79","v6.1-rc5","v5.10.155","v5.15.78","v5.10.154","v5.15.77","v5.10.153","v5.15.76","v5.10.152","v5.10.151","v5.15.75","v5.10.150","v6.0-rc1","v5.10.149","v5.15.74","v5.10.148","v6.0","v5.15.73","v5.10.147","v5.15.72","v6.0-rc7","v5.15.71","v5.10.146","v6.0-rc3","v6.0-rc2","v5.15.70","v5.10.145","v6.0-rc6","v6.0-rc4","v6.0-rc5","v5.10.144","v5.15.69","v5.15.68","v5.10.143","v5.10.142","v5.15.67","v5.15.66","v5.15.65","v5.10.141","v5.15.64","v5.10.140","v5.19","v5.15.63","v5.10.139","v5.10.138","v5.15.62","v5.10.137","v5.15.61","v5.10.136","v5.15.60","v5.19-rc1","v5.15.59","v5.10.135","v5.15.58","v5.10.134","v5.19-rc5","v5.19-rc8","v5.19-rc6","v5.18","v5.19-rc2","v5.19-rc7","v5.15.57","v5.10.133","v5.19-rc3","v5.10.132","v5.15.56","v5.15.55","v5.10.131","v5.19-rc4","v5.10.130","v5.15.54","v5.15.53","v5.10.129","v5.15.52","v5.10.128","v5.15.51","v5.10.127","v5.18-rc1","v5.15.50","v5.10.126","v5.10.125","v5.15.49","v5.10.124","v5.15.48","v5.10.123","v5.15.47","v5.10.122","v5.15.46","v5.10.121","v5.15.45","v5.10.120","v5.15.44","v5.10.119","v5.10.118","v5.15.43","v5.18-rc7","v5.18-rc2","v5.15.42","v5.15.41","v5.10.117","v5.15.40","v5.10.116","v5.18-rc5","v5.17","v5.18-rc4","v5.18-rc3","v5.18-rc6","v5.15.39","v5.10.115","v5.15.38","v5.10.114","v5.15.37","v5.10.113","v5.15.36","v5.15.35","v5.10.112","v5.15.34","v5.10.111","v5.10.110","v5.15.33","v5.10.109","v5.15.32","v5.17-rc6","v5.17-rc4","v5.15.31","v5.10.108","v5.17-rc8","v5.17-rc7","v5.15.30","v5.10.107","v5.17-rc1","v5.15.29","v5.10.106","v5.17-rc3","v5.15.28","v5.10.105","v5.17-rc2","v5.15.27","v5.10.104","v5.15.26","v5.10.103","v5.17-rc5","v5.16","v5.15.25","v5.10.102","v5.15.24","v5.10.101","v5.15.23","v5.10.100","v5.15.22","v5.10.99","v5.15.21","v5.10.98","v5.15.20","v5.10.97","v5.15.19","v5.10.96","v5.15.18","v5.10.95","v5.15.17","v5.10.94","v5.15.16","v5.10.93","v5.10.92","v5.15.15","v5.16-rc1","v5.10.91","v5.15.14","v5.16-rc8","v5.15.13","v5.10.90","v5.16-rc5","v5.16-rc6","v5.15.12","v5.10.89","v5.16-rc7","v5.15.11","v5.10.88","v5.16-rc3","v5.16-rc2","v5.15.10","v5.10.87","v5.15.9","v5.10.86","v5.16-rc4","v5.10.85","v5.1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