{"id":"CVE-2026-90023","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_mass_storage: fix null pointer dereference in fsg_common_set_num_buffers()\n\nPreviously fsg_num_buffers_validate() was removed as it was not\nnecessary due…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_mass_storage: fix null pointer dereference in fsg_common_set_num_buffers()\n\nPreviously fsg_num_buffers_validate() was removed as it was not\nnecessary due…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= fe5a6c48fd954489f51aab151d5dad9254c76419 < 9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957","Linux >= fe5a6c48fd954489f51aab151d5dad9254c76419 < b9b5b5df5b8dd3c1572ed267200276a44cc67d8e","Linux >= fe5a6c48fd954489f51aab151d5dad9254c76419 < 2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc","Linux 4.8"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T11:17:15.250","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90023","references":[{"url":"https://git.kernel.org/stable/c/2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b9b5b5df5b8dd3c1572ed267200276a44cc67d8e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:53.936Z","epss":0.0021,"epssPercentile":0.11466,"slug":"CVE-2026-90023","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_mass_storage: fix null pointer dereference in fsg_common_set_num_buffers()\n\nPreviously fsg_num_buffers_validate() was removed as it was not\nnecessary due to Kconfig setting the limits for n from 2 to 256 with\ndefault as 2. However, setting the page content in such a way that\nkstrtou8() reflects n value as either 0 or 1 bypasses these\nrestrictions leading to a null pointer dereference if n is 0. Fix\nthis by adding a check for n < 2 and returning -EINVAL if n is\neither 0 or 1 consistent with Kconfig logic.\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":[]}