CVE-2026-98056
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: nvme: remove stale namespaces by NSID range during scan nvme_scan_ns_list() drops the stale namespaces in each gap in the reported NSID list one NSID at a time. Every iteration calls nvme_find_get_ns() to look the namespace up and removes it if it is present. The loop runs once per NSID in the gap rather than once per namespace actually present. NSIDs are 32-bit, so a target with a sparse NSID space can make a single gap spin the loop billions of times with nothing to remove. watchdog: BUG: soft lockup - CPU#4 stuck for 26s! Workqueue: nvme-wq nvme_scan_work [nvme_core] RIP: 0010:__srcu_read_unlock+0xb/0x20 Call Trace: nvme_find_get_ns+0x7d/0xb0 [nvme_core] nvme_scan_ns_list+0xe8/0x280 [nvme_core] nvme_scan_work+0x18a/0x280 [nvme_core] process_one_work+0x197/0x380 worker_thread+0x2fe/0x410 kthread+0xe0/0x100 Rename nvme_remove_invalid_namespaces() to nvme_remove_nsid_range() and give it an open (start, end) NSID range. ctrl->namespaces is sorted by NSID, so the whole gap is dropped in a single walk that stops once end is reached. This bounds the work by the namespaces that are present instead of by the size of the gap.
View original CVE JSON
{
"id": "CVE-2026-98056",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-25T11:17:34.547",
"lastModified": "2026-10-21T13:21:20.620",
"vulnStatus": "Undergoing Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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->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."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/nvme/host/core.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "540c801c65eb58e05e0ca38b6fd644a83d7e2b33",
"lessThan": "e6a94b2c4c80a38002346ce915a9b9a3d478a3e6",
"versionType": "git",
"status": "affected"
},
{
"version": "540c801c65eb58e05e0ca38b6fd644a83d7e2b33",
"lessThan": "c84ad7407fb16b92d9b7a649cc304a9cf3757897",
"versionType": "git",
"status": "affected"
},
{
"version": "540c801c65eb58e05e0ca38b6fd644a83d7e2b33",
"lessThan": "f56b2bb4b18b017b056c4c17c66b2c4c54bf6ee4",
"versionType": "git",
"status": "affected"
},
{
"version": "540c801c65eb58e05e0ca38b6fd644a83d7e2b33",
"lessThan": "52200fc41a79da430ccf7c126ed837535b087ea2",
"versionType": "git",
"status": "affected"
},
{
"version": "540c801c65eb58e05e0ca38b6fd644a83d7e2b33",
"lessThan": "4ed7f3d7d435bf5b63da2814dc9270f5ba896011",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/nvme/host/core.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "4.5",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.5",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.160",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.111",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.53",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.7",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6
}
]
},
"references": [
{
"url": "https://git.kernel.org/stable/c/4ed7f3d7d435bf5b63da2814dc9270f5ba896011",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/52200fc41a79da430ccf7c126ed837535b087ea2",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c84ad7407fb16b92d9b7a649cc304a9cf3757897",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e6a94b2c4c80a38002346ce915a9b9a3d478a3e6",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f56b2bb4b18b017b056c4c17c66b2c4c54bf6ee4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}