CVE-2026-93785

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93785", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-18T17:59:28.788Z", "datePublished": "2026-09-24T16:02:18.964Z", "dateUpdated": "2026-10-03T10:57:20.267Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-03T10:57:20.267Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: validate idmap key payload length\n\nThe cifs.idmap key type stores its payload length in key->datalen, which\nis limited to U16_MAX. Accepting a larger key payload truncates the\nrecorded length and can make later users interpret the payload using\ninconsistent bounds.\n\nReject oversized preparsed payloads before allocating or copying them.\nThis keeps key->datalen consistent with the stored data for both inline\nand separately allocated idmap payloads."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/cifsacl.c"], "versions": [{"version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e", "lessThan": "eeac976b74b4f697cfc517187b7cbfd72652dbbc", "status": "affected", "versionType": "git"}, {"version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e", "lessThan": "125b05ac8ca8758950e4369c1542d57a162f504c", "status": "affected", "versionType": "git"}, {"version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e", "lessThan": "945f6cde6bcf8f08f6fa5df8882b1b9582e55efa", "status": "affected", "versionType": "git"}, {"version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e", "lessThan": "3a4a34a732e8a08309eed0a74314dbd9f2f1c972", "status": "affected", "versionType": "git"}, {"version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e", "lessThan": "6cfeef221ac00d63c07f6122f58e6159bde69ca0", "status": "affected", "versionType": "git"}, {"version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e", "lessThan": "8b12f65d7caf16d124098cb4895a203367d35b57", "status": "affected", "versionType": "git"}, {"version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e", "lessThan": "455488cd5054bcc59db40fa1cc2c004031a5b2a5", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/cifsacl.c"], "versions": [{"version": "3.2", "status": "affected"}, {"version": "0", "lessThan": "3.2", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.271", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "3.2", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/eeac976b74b4f697cfc517187b7cbfd72652dbbc"}, {"url": "https://git.kernel.org/stable/c/125b05ac8ca8758950e4369c1542d57a162f504c"}, {"url": "https://git.kernel.org/stable/c/945f6cde6bcf8f08f6fa5df8882b1b9582e55efa"}, {"url": "https://git.kernel.org/stable/c/3a4a34a732e8a08309eed0a74314dbd9f2f1c972"}, {"url": "https://git.kernel.org/stable/c/6cfeef221ac00d63c07f6122f58e6159bde69ca0"}, {"url": "https://git.kernel.org/stable/c/8b12f65d7caf16d124098cb4895a203367d35b57"}, {"url": "https://git.kernel.org/stable/c/455488cd5054bcc59db40fa1cc2c004031a5b2a5"}], "title": "cifs: validate idmap key payload length", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/client/cifsacl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "eeac976b74b4f697cfc517187b7cbfd72652dbbc", "status": "affected", "version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e", "versionType": "git"}, {"lessThan": "125b05ac8ca8758950e4369c1542d57a162f504c", "status": "affected", "version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e", "versionType": "git"}, {"lessThan": "945f6cde6bcf8f08f6fa5df8882b1b9582e55efa", "status": "affected", "version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e", "versionType": "git"}, {"lessThan": "3a4a34a732e8a08309eed0a74314dbd9f2f1c972", "status": "affected", "version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e", "versionType": "git"}, {"lessThan": "6cfeef221ac00d63c07f6122f58e6159bde69ca0", "status": "affected", "version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e", "versionType": "git"}, {"lessThan": "8b12f65d7caf16d124098cb4895a203367d35b57", "status": "affected", "version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e", "versionType": "git"}, {"lessThan": "455488cd5054bcc59db40fa1cc2c004031a5b2a5", "status": "affected", "version": "21fed0d5b763b94a7d1568c27d0cce892ab8d43e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/client/cifsacl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.2"}, {"lessThan": "3.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.271", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.222", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\ncifs: validate idmap key payload length\n\nThe cifs.idmap key type stores its payload length in key->datalen, which\nis limited to U16_MAX. Accepting a larger key payload truncates the\nrecorded length and can make later users interpret the payload using\ninconsistent bounds.\n\nReject oversized preparsed payloads before allocating or copying them.\nThis keeps key->datalen consistent with the stored data for both inline\nand separately allocated idmap payloads."}], "id": "CVE-2026-93785", "lastModified": "2026-10-03T11:17:48.050", "metrics": {}, "published": "2026-09-24T17:17:11.130", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/125b05ac8ca8758950e4369c1542d57a162f504c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3a4a34a732e8a08309eed0a74314dbd9f2f1c972"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/455488cd5054bcc59db40fa1cc2c004031a5b2a5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6cfeef221ac00d63c07f6122f58e6159bde69ca0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8b12f65d7caf16d124098cb4895a203367d35b57"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/945f6cde6bcf8f08f6fa5df8882b1b9582e55efa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eeac976b74b4f697cfc517187b7cbfd72652dbbc"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: cifs: validate idmap key payload length", "id": "2540534", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2540534"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-681", "details": ["A flaw was found in the Linux kernel's Common Internet File System (CIFS) implementation. An integer truncation issue in the identity mapping key handler allows a local user to supply an oversized key payload that exceeds the maximum supported length limit. This size discrepancy causes subsequent operations to process the payload with inconsistent boundary lengths, which can lead to memory corruption or a denial of service (DoS)."], "name": "CVE-2026-93785", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-93785\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-93785\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93785.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,6cfeef221ac00d63c07f6122f58e6159bde69ca0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,8b12f65d7caf16d124098cb4895a203367d35b57)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,455488cd5054bcc59db40fa1cc2c004031a5b2a5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.111)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.53)"}}], "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": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.111,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-09-24T20:15:03.510167+00:00", "updated": "2026-09-28T16:15:04.199457+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}