{"id":"CVE-2026-98056","summary":"nvme: remove stale namespaces by NSID range during scan","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: remove stale namespaces by NSID range during scan\n\nnvme_scan_ns_list() drops the stale namespaces in each gap in the\nreported NSID list one NSID at a time. Every iteration calls\nnvme_find_get_ns() to look the namespace up and removes it if it is\npresent. The loop runs once per NSID in the gap rather than once per\nnamespace actually present.\n\nNSIDs are 32-bit, so a target with a sparse NSID space can make a\nsingle gap spin the loop billions of times with nothing to remove.\n\n  watchdog: BUG: soft lockup - CPU#4 stuck for 26s!\n  Workqueue: nvme-wq nvme_scan_work [nvme_core]\n  RIP: 0010:__srcu_read_unlock+0xb/0x20\n  Call Trace:\n   nvme_find_get_ns+0x7d/0xb0 [nvme_core]\n   nvme_scan_ns_list+0xe8/0x280 [nvme_core]\n   nvme_scan_work+0x18a/0x280 [nvme_core]\n   process_one_work+0x197/0x380\n   worker_thread+0x2fe/0x410\n   kthread+0xe0/0x100\n\nRename nvme_remove_invalid_namespaces() to nvme_remove_nsid_range()\nand give it an open (start, end) NSID range. ctrl-\u003enamespaces is\nsorted by NSID, so the whole gap is dropped in a single walk that\nstops once end is reached. This bounds the work by the namespaces\nthat are present instead of by the size of the gap.","modified":"2026-09-26T03:48:32.290657752Z","published":"2026-09-25T10:24:02.919Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98056.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4ed7f3d7d435bf5b63da2814dc9270f5ba896011"},{"type":"WEB","url":"https://git.kernel.org/stable/c/52200fc41a79da430ccf7c126ed837535b087ea2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c84ad7407fb16b92d9b7a649cc304a9cf3757897"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f56b2bb4b18b017b056c4c17c66b2c4c54bf6ee4"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98056.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98056"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"540c801c65eb58e05e0ca38b6fd644a83d7e2b33"},{"fixed":"c84ad7407fb16b92d9b7a649cc304a9cf3757897"},{"fixed":"f56b2bb4b18b017b056c4c17c66b2c4c54bf6ee4"},{"fixed":"52200fc41a79da430ccf7c126ed837535b087ea2"},{"fixed":"4ed7f3d7d435bf5b63da2814dc9270f5ba896011"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98056.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.5.0"},{"fixed":"6.12.111"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.53"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98056.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}