{"id":"AZL-88755","summary":"CVE-2026-45961 affecting package kernel 6.6.150.1-1","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to properly handle the withdrawal case where\nquota initialization succeeds but the filesystem is then withdrawn.\n\nThread leak backtrace (gfs2_freeze_lock_shared failure):\n  unreferenced object 0xffff88801d7bca80 (size 4480):\n    copy_process+0x3a1/0x4670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":"2026-08-30T05:26:50Z","published":"2026-05-27T14:17:12Z","upstream":["CVE-2026-45961"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45961"}],"affected":[{"package":{"name":"kernel","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/kernel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"6.6.150.1-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-88755.json"}}],"schema_version":"1.9.0"}