175 lines
6.8 KiB
JSON
175 lines
6.8 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-6686",
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"assignerOrgId": "44488dab-36db-4358-99f9-bc116477f914",
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"state": "PUBLISHED",
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"assignerShortName": "runZero",
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"dateReserved": "2026-04-20T15:06:22.242Z",
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"datePublished": "2026-07-01T13:55:09.072Z",
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"dateUpdated": "2026-07-01T15:05:27.926Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "44488dab-36db-4358-99f9-bc116477f914",
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"shortName": "runZero",
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"dateUpdated": "2026-07-01T13:55:09.072Z"
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},
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"title": "FatFs Use of Uninitialized Clusters After Seek Past EOF",
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"datePublic": "2026-07-01T13:00:00.000Z",
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"cweId": "CWE-908",
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"description": "CWE-908 Use of uninitialized resource",
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"type": "CWE"
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}
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]
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}
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],
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"affected": [
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{
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"vendor": "ChaN",
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"product": "FatFs",
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"versions": [
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{
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"status": "affected",
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"version": "0",
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"lessThanOrEqual": "R0.16",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unaffected"
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"value": "FatFs R0.16 and earlier contains an uninitialized cluster exposure when f_lseek() extends files beyond EOF without zero-filling newly allocated clusters. This maps to CWE-908 (Use of Uninitialized Resource). Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N (4.6, Medium). The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Partial.",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "FatFs R0.16 and earlier contains an uninitialized cluster exposure when f_lseek() extends files beyond EOF without zero-filling newly allocated clusters. This maps to CWE-908 (Use of Uninitialized Resource). Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N (4.6, Medium). The estimated CISA SSVC vectors are Exploitation: PoC, Technical Impact: Partial."
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}
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]
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}
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],
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"references": [
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{
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"url": "https://www.runzero.com/blog/fatfs-bugs/",
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"tags": [
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"third-party-advisory"
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]
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},
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{
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"url": "https://github.com/runZeroInc/vulns-2026-fatfs-chance",
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"tags": [
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"technical-description"
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]
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},
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{
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"url": "https://elm-chan.org/fsw/ff/",
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"tags": [
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"product"
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]
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},
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{
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"url": "https://www.runzero.com/advisories/fatfs-uninit-cluster-exposure-cve-2026-6686/",
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"tags": [
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"third-party-advisory"
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]
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}
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],
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"metrics": [
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{
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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],
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"cvssV3_1": {
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"version": "3.1",
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"attackVector": "PHYSICAL",
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"attackComplexity": "LOW",
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "NONE",
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"availabilityImpact": "NONE",
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"baseSeverity": "MEDIUM",
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"baseScore": 4.6,
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"vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
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}
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "HD Moore of runZero, Inc.",
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"type": "finder"
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},
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{
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"lang": "en",
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"value": "Tod Beardsley of runZero, Inc.",
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"type": "coordinator"
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}
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],
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"source": {
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"discovery": "UNKNOWN"
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},
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"x_generator": {
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"engine": "Vulnogram 1.0.2"
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}
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},
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"adp": [
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{
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"references": [
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{
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"url": "https://github.com/runZeroInc/vulns-2026-fatfs-chance",
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"tags": [
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"exploit"
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]
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}
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],
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-07-01T15:05:23.138301Z",
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"id": "CVE-2026-6686",
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"options": [
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{
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"Exploitation": "poc"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-07-01T15:05:27.926Z"
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}
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}
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]
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}
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} |