{"id":"CVE-2026-98056","title":"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","summary":"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 …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 540c801c65eb58e05e0ca38b6fd644a83d7e2b33 < c84ad7407fb16b92d9b7a649cc304a9cf3757897","Linux >= 540c801c65eb58e05e0ca38b6fd644a83d7e2b33 < f56b2bb4b18b017b056c4c17c66b2c4c54bf6ee4","Linux >= 540c801c65eb58e05e0ca38b6fd644a83d7e2b33 < 52200fc41a79da430ccf7c126ed837535b087ea2","Linux >= 540c801c65eb58e05e0ca38b6fd644a83d7e2b33 < 4ed7f3d7d435bf5b63da2814dc9270f5ba896011","Linux 4.5"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T15:18:05.140","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98056","references":[{"url":"https://git.kernel.org/stable/c/4ed7f3d7d435bf5b63da2814dc9270f5ba896011","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/52200fc41a79da430ccf7c126ed837535b087ea2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c84ad7407fb16b92d9b7a649cc304a9cf3757897","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f56b2bb4b18b017b056c4c17c66b2c4c54bf6ee4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-25T11:06:38.844Z","slug":"CVE-2026-98056","body":"## Overview\n\nIn 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->namespaces 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":210914,"id":"CVE-2026-98056","ts":1790349115244,"field":"cvss","old":null,"new":"7.5"},{"seq":210913,"id":"CVE-2026-98056","ts":1790349115244,"field":"severity","old":"none","new":"high"}]}