{"id":"CVE-2026-98814","title":"nvme: fix command effects log lifetime for multipath heads","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: fix command effects log lifetime for multipath heads\n\nKASAN reported a use-after-free when an I/O passthrough command was sent\nthrough a multipath namespace head …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= be93e87e780253780df9bb6ecc9bc1199b0d94c3 < 351d1c47e45b2b35780d0548b1012d7242ba298d","Linux >= be93e87e780253780df9bb6ecc9bc1199b0d94c3 < 72ece656abd4de8645a421fb482d7a11e6533a45","Linux 5.9"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:49:01.538Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98814","references":[{"url":"https://git.kernel.org/stable/c/351d1c47e45b2b35780d0548b1012d7242ba298d"},{"url":"https://git.kernel.org/stable/c/72ece656abd4de8645a421fb482d7a11e6533a45"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T16:47:32.477Z","slug":"CVE-2026-98814","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnvme: fix command effects log lifetime for multipath heads\n\nKASAN reported a use-after-free when an I/O passthrough command was sent\nthrough a multipath namespace head after the controller path that first\ncreated the head had been removed:\n\n  BUG: KASAN: slab-use-after-free in nvme_command_effects+0x192/0x200 [nvme_core]\n  Read of size 4 at addr ffff888141b14400 by task nvme/19811\n  nvme_command_effects+0x192/0x200 [nvme_core]\n  nvme_cmd_allowed+0x7e/0x1b0 [nvme_core]\n  nvme_user_cmd.constprop.0+0x1b5/0x450 [nvme_core]\n  nvme_ns_head_chr_ioctl+0xf4/0x2a0 [nvme_core]\n\nMove the log cache to the subsystem, with one entry per command set. Both\ncontrollers and namespace heads hold subsystem references, keeping their\nlog pointers valid until subsystem release.\n\n## Affected\n\n- `Linux >= be93e87e780253780df9bb6ecc9bc1199b0d94c3 < 351d1c47e45b2b35780d0548b1012d7242ba298d`\n- `Linux >= be93e87e780253780df9bb6ecc9bc1199b0d94c3 < 72ece656abd4de8645a421fb482d7a11e6533a45`\n- `Linux 5.9`\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":[]}