CVE-2026-90023

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90023", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.782Z", "datePublished": "2026-09-16T10:33:26.905Z", "dateUpdated": "2026-10-30T12:33:51.550Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:33:51.550Z"}, "descriptions": [{"lang": "en", "value": "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 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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/gadget/function/f_mass_storage.c"], "versions": [{"version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "lessThan": "38edd187a37db0d8e4bf84cc954dbdbe7bfa366f", "status": "affected", "versionType": "git"}, {"version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "lessThan": "e54820b9dc1d6d731ecc3e51462445dc952906a7", "status": "affected", "versionType": "git"}, {"version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "lessThan": "5d56dbaeb81d5cd967cdee8ddcc70814b7139246", "status": "affected", "versionType": "git"}, {"version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "lessThan": "f4f0fe3ab47ed57ee4974fdd3e9dccb7839a7ebf", "status": "affected", "versionType": "git"}, {"version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "lessThan": "51cc9af4f2d3f0b765266aced66b9b532b423b13", "status": "affected", "versionType": "git"}, {"version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "lessThan": "9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957", "status": "affected", "versionType": "git"}, {"version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "lessThan": "b9b5b5df5b8dd3c1572ed267200276a44cc67d8e", "status": "affected", "versionType": "git"}, {"version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "lessThan": "2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/gadget/function/f_mass_storage.c"], "versions": [{"version": "4.8", "status": "affected"}, {"version": "0", "lessThan": "4.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/38edd187a37db0d8e4bf84cc954dbdbe7bfa366f"}, {"url": "https://git.kernel.org/stable/c/e54820b9dc1d6d731ecc3e51462445dc952906a7"}, {"url": "https://git.kernel.org/stable/c/5d56dbaeb81d5cd967cdee8ddcc70814b7139246"}, {"url": "https://git.kernel.org/stable/c/f4f0fe3ab47ed57ee4974fdd3e9dccb7839a7ebf"}, {"url": "https://git.kernel.org/stable/c/51cc9af4f2d3f0b765266aced66b9b532b423b13"}, {"url": "https://git.kernel.org/stable/c/9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957"}, {"url": "https://git.kernel.org/stable/c/b9b5b5df5b8dd3c1572ed267200276a44cc67d8e"}, {"url": "https://git.kernel.org/stable/c/2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc"}], "title": "usb: gadget: f_mass_storage: fix null pointer dereference in fsg_common_set_num_buffers()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/usb/gadget/function/f_mass_storage.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "38edd187a37db0d8e4bf84cc954dbdbe7bfa366f", "status": "affected", "version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "versionType": "git"}, {"lessThan": "e54820b9dc1d6d731ecc3e51462445dc952906a7", "status": "affected", "version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "versionType": "git"}, {"lessThan": "5d56dbaeb81d5cd967cdee8ddcc70814b7139246", "status": "affected", "version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "versionType": "git"}, {"lessThan": "f4f0fe3ab47ed57ee4974fdd3e9dccb7839a7ebf", "status": "affected", "version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "versionType": "git"}, {"lessThan": "51cc9af4f2d3f0b765266aced66b9b532b423b13", "status": "affected", "version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "versionType": "git"}, {"lessThan": "9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957", "status": "affected", "version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "versionType": "git"}, {"lessThan": "b9b5b5df5b8dd3c1572ed267200276a44cc67d8e", "status": "affected", "version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "versionType": "git"}, {"lessThan": "2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc", "status": "affected", "version": "fe5a6c48fd954489f51aab151d5dad9254c76419", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/usb/gadget/function/f_mass_storage.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.8"}, {"lessThan": "4.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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 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."}], "id": "CVE-2026-90023", "lastModified": "2026-10-30T13:20:39.143", "metrics": {}, "published": "2026-09-16T11:17:15.250", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/38edd187a37db0d8e4bf84cc954dbdbe7bfa366f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/51cc9af4f2d3f0b765266aced66b9b532b423b13"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5d56dbaeb81d5cd967cdee8ddcc70814b7139246"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b9b5b5df5b8dd3c1572ed267200276a44cc67d8e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e54820b9dc1d6d731ecc3e51462445dc952906a7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f4f0fe3ab47ed57ee4974fdd3e9dccb7839a7ebf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fe5a6c48fd954489f51aab151d5dad9254c76419,9e8dd2a7a8ccbb756771ad985b0ad3387ed3c957)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fe5a6c48fd954489f51aab151d5dad9254c76419,b9b5b5df5b8dd3c1572ed267200276a44cc67d8e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fe5a6c48fd954489f51aab151d5dad9254c76419,2c0f5ca48674a5b5f9fa4a9c3325aa48053af0bc)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.5,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-17T19:30:06.271985+00:00", "updated": "2026-09-18T07:15:04.745638+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476"]}