CVE-2026-93828

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93828", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-18T17:59:28.793Z", "datePublished": "2026-09-24T16:03:08.417Z", "dateUpdated": "2026-10-30T12:36:52.106Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:36:52.106Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nexfat: fix handling of damaged volume in exfat_create_upcase_table()\n\nWhen the size of the upcase table is set to zero in the dentry for any\nreason(e.g. corrupted media or misbehaving device), an integer overflow\ncauses the module to loop indefinitely.\n\nIf the size of the upcase table is read zero, do not attempt to load the\ntable. Instead, fallback to loading the default upcase table. If the\nsize of the upcase table is zero or no upcase table is found, raise\nexfat_fs_error() to mark the volume read-only."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/exfat/nls.c"], "versions": [{"version": "370e812b3ec190fa492c9fd5a80c38b086d105c0", "lessThan": "091ca992218105a050af0b863337e02a2d518b2f", "status": "affected", "versionType": "git"}, {"version": "370e812b3ec190fa492c9fd5a80c38b086d105c0", "lessThan": "29723256fccf46e55c2a44bd6b8345bef7ba079b", "status": "affected", "versionType": "git"}, {"version": "370e812b3ec190fa492c9fd5a80c38b086d105c0", "lessThan": "60ace93811609e4dd883e9de5fb4462ed834160a", "status": "affected", "versionType": "git"}, {"version": "370e812b3ec190fa492c9fd5a80c38b086d105c0", "lessThan": "2cc0b612343638057ef321ce735201a7c2f52f25", "status": "affected", "versionType": "git"}, {"version": "370e812b3ec190fa492c9fd5a80c38b086d105c0", "lessThan": "20dd3185d13865214ff25b0bf7b931e8d73be1ac", "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/exfat/nls.c"], "versions": [{"version": "5.7", "status": "affected"}, {"version": "0", "lessThan": "5.7", "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": "6.12.111", "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": "5.7", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/091ca992218105a050af0b863337e02a2d518b2f"}, {"url": "https://git.kernel.org/stable/c/29723256fccf46e55c2a44bd6b8345bef7ba079b"}, {"url": "https://git.kernel.org/stable/c/60ace93811609e4dd883e9de5fb4462ed834160a"}, {"url": "https://git.kernel.org/stable/c/2cc0b612343638057ef321ce735201a7c2f52f25"}, {"url": "https://git.kernel.org/stable/c/20dd3185d13865214ff25b0bf7b931e8d73be1ac"}], "title": "exfat: fix handling of damaged volume in exfat_create_upcase_table()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/exfat/nls.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "091ca992218105a050af0b863337e02a2d518b2f", "status": "affected", "version": "370e812b3ec190fa492c9fd5a80c38b086d105c0", "versionType": "git"}, {"lessThan": "29723256fccf46e55c2a44bd6b8345bef7ba079b", "status": "affected", "version": "370e812b3ec190fa492c9fd5a80c38b086d105c0", "versionType": "git"}, {"lessThan": "60ace93811609e4dd883e9de5fb4462ed834160a", "status": "affected", "version": "370e812b3ec190fa492c9fd5a80c38b086d105c0", "versionType": "git"}, {"lessThan": "2cc0b612343638057ef321ce735201a7c2f52f25", "status": "affected", "version": "370e812b3ec190fa492c9fd5a80c38b086d105c0", "versionType": "git"}, {"lessThan": "20dd3185d13865214ff25b0bf7b931e8d73be1ac", "status": "affected", "version": "370e812b3ec190fa492c9fd5a80c38b086d105c0", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/exfat/nls.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.7"}, {"lessThan": "5.7", "status": "unaffected", "version": "0", "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": "6.12.111", "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\nexfat: fix handling of damaged volume in exfat_create_upcase_table()\n\nWhen the size of the upcase table is set to zero in the dentry for any\nreason(e.g. corrupted media or misbehaving device), an integer overflow\ncauses the module to loop indefinitely.\n\nIf the size of the upcase table is read zero, do not attempt to load the\ntable. Instead, fallback to loading the default upcase table. If the\nsize of the upcase table is zero or no upcase table is found, raise\nexfat_fs_error() to mark the volume read-only."}], "id": "CVE-2026-93828", "lastModified": "2026-10-30T13:21:03.580", "metrics": {}, "published": "2026-09-24T17:17:16.517", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/091ca992218105a050af0b863337e02a2d518b2f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/20dd3185d13865214ff25b0bf7b931e8d73be1ac"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/29723256fccf46e55c2a44bd6b8345bef7ba079b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2cc0b612343638057ef321ce735201a7c2f52f25"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/60ace93811609e4dd883e9de5fb4462ed834160a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: exfat: fix handling of damaged volume in exfat_create_upcase_table()", "id": "2540454", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2540454"}, "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-835", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nexfat: fix handling of damaged volume in exfat_create_upcase_table()\nWhen the size of the upcase table is set to zero in the dentry for any\nreason(e.g. corrupted media or misbehaving device), an integer overflow\ncauses the module to loop indefinitely.\nIf the size of the upcase table is read zero, do not attempt to load the\ntable. Instead, fallback to loading the default upcase table. If the\nsize of the upcase table is zero or no upcase table is found, raise\nexfat_fs_error() to mark the volume read-only.", "A flaw was found in the Linux kernel's exFAT file system. A local user capable of mounting a corrupted or maliciously crafted storage volume can trigger an integer calculation error when the system processes an uppercase translation table with a size of zero. This failure causes the kernel to enter an infinite loop, leading to a Denial of Service (DoS) condition."], "name": "CVE-2026-93828", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "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": "Not affected", "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-2026-93828\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-93828\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93828.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,60ace93811609e4dd883e9de5fb4462ed834160a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,2cc0b612343638057ef321ce735201a7c2f52f25)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,20dd3185d13865214ff25b0bf7b931e8d73be1ac)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.0.0,6.12.111)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.0.0,6.18.53)"}}], "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": "semver", "value": "[7.2.0,*]"}}], "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": "2026-09-24T22:30:16.968617+00:00", "updated": "2026-10-01T19:45:03.446367+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}