{"id":"CVE-2026-90322","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2/cluster: keep heartbeat local node stable\n\no2nm_node_local_store() handles local=0 by stopping o2net and setting\ncl_local_node to O2NM_INVALID_NODE_NUM, but it le…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2/cluster: keep heartbeat local node stable\n\no2nm_node_local_store() handles local=0 by stopping o2net and setting\ncl_local_node to O2NM_INVALID_NODE_NUM, but it le…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= a7f6a5fb4bde142b622706e2006ba33f793e13ed < 8e5cb90f212fda9f6cd29915a1ed74353108ceb3","Linux >= a7f6a5fb4bde142b622706e2006ba33f793e13ed < 8abb2b7c60d2b2c0f40606048c873096c03874d2","Linux >= a7f6a5fb4bde142b622706e2006ba33f793e13ed < 70d7bb7a0be033e5ebe8a2c48974692b1318891c","Linux >= a7f6a5fb4bde142b622706e2006ba33f793e13ed < 688bc88e2046dd6ce81ce18079b5254cb8dadc0e","Linux 2.6.16"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:30.173","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90322","references":[{"url":"https://git.kernel.org/stable/c/688bc88e2046dd6ce81ce18079b5254cb8dadc0e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/70d7bb7a0be033e5ebe8a2c48974692b1318891c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8abb2b7c60d2b2c0f40606048c873096c03874d2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8e5cb90f212fda9f6cd29915a1ed74353108ceb3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.823Z","epss":0.002,"epssPercentile":0.10156,"slug":"CVE-2026-90322","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nocfs2/cluster: keep heartbeat local node stable\n\no2nm_node_local_store() handles local=0 by stopping o2net and setting\ncl_local_node to O2NM_INVALID_NODE_NUM, but it leaves cl_has_local set. \nThat stale state makes o2nm_this_node() return 255, blocks a later local=1\nattempt with -EBUSY, and can feed 255 to heartbeat users that call\no2nm_this_node() dynamically.\n\nClearing cl_has_local is required when the local node is reset.  But\nheartbeat threads can still be running at that point.  They pin the local\nnode config item at startup, yet o2hb_do_disk_heartbeat() and thread\nteardown re-read o2nm_this_node() for the local slot and for\no2nm_undepend_this_node().  Once local=0 has cleared the live local-node\nstate, those dynamic reads return O2NM_MAX_NODES, which is also the\ninvalid node number 255.\n\nStore the local node number in the heartbeat region when the region\nstarts.  Use that stable node for heartbeat slot writes/checks,\nnegotiation messages, and the final configfs undepend.  Stop the heartbeat\nloop when the current local node no longer matches the stored node, and\nclear cl_has_local together with cl_local_node in the local=0 path so\nnodemanager state matches node removal.\n\nValidation reproduced this kernel report:\nKASAN slab-out-of-bounds in o2hb_do_disk_heartbeat+0x372/0xb30\nRIP: 0010:memset+0xf/0x20\nRead of size 8\nCall trace:\n  dump_stack_lvl+0x66/0xa0\n  print_report+0xd0/0x630\n  o2hb_do_disk_heartbeat+0x372/0xb30 (fs/ocfs2/cluster/heartbeat.c:1079)\n  srso_alias_return_thunk+0x5/0xfbef5\n  __virt_addr_valid+0x188/0x2f0\n  kasan_report+0xe4/0x120\n  o2hb_do_disk_heartbeat+0x5/0xb30 (fs/ocfs2/cluster/heartbeat.c:1079)\n  o2hb_thread+0x14e/0x770\n  kthread_affine_node+0x139/0x180\n  lockdep_hardirqs_on_prepare+0xda/0x190\n  trace_hardirqs_on+0x18/0x130\n  kthread+0x19d/0x1e0\n  ret_from_fork+0x37a/0x4d0\n  __switch_to+0x2d5/0x6f0\n  ret_from_fork_asm+0x1a/0x30\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}