{"id":"CVE-2026-90324","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nublk: check import_ubuf() return value\n\nimport_ubuf() can fail if the address range (provided by the userspace\nublk server) is outside the allowed user address space","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nublk: check import_ubuf() return value\n\nimport_ubuf() can fail if the address range (provided by the userspace\nublk server) is outside the allowed user address space. R…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 981f95a571e3ca20a496c0b77dbf6b06039c6648 < 0121c84adb6a4cd6f7560b5895bd88f9899bbc1f","Linux >= 981f95a571e3ca20a496c0b77dbf6b06039c6648 < 5ac6019cb78e98c9608fda72726b36ddf8474dd7","Linux >= 981f95a571e3ca20a496c0b77dbf6b06039c6648 < 3831568792af75b6523fa93bb91560e29189cf55","Linux 6.5"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:17:53.840","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90324","references":[{"url":"https://git.kernel.org/stable/c/0121c84adb6a4cd6f7560b5895bd88f9899bbc1f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3831568792af75b6523fa93bb91560e29189cf55","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5ac6019cb78e98c9608fda72726b36ddf8474dd7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00161,"epssPercentile":0.05761,"ingestedAt":"2026-09-17T16:21:47.824Z","slug":"CVE-2026-90324","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nublk: check import_ubuf() return value\n\nimport_ubuf() can fail if the address range (provided by the userspace\nublk server) is outside the allowed user address space. Return that 0\nbytes were copied if import_ubuf() fails rather than passing an\nuninitialized struct iov_iter to ublk_copy_user_pages().\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207255,"id":"CVE-2026-90324","ts":1789757339916,"field":"cvss","old":null,"new":"7.8"},{"seq":207254,"id":"CVE-2026-90324","ts":1789757339916,"field":"severity","old":"none","new":"high"}]}