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vuln-cve/data/2026/16xxx/CVE-2026-16560.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-16560",
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"state": "PUBLISHED",
"assignerShortName": "redhat",
"dateReserved": "2026-07-22T12:11:52.389Z",
"datePublished": "2026-07-22T12:51:43.263Z",
"dateUpdated": "2026-11-05T19:24:06.831Z"
},
"containers": {
"cna": {
"title": "389-ds-base: 389-ds-base: heap-buffer-overflow in rdn_av_swap on quoted multivalued rdn",
"metrics": [
{
"other": {
"content": {
"value": "Moderate",
"namespace": "https://access.redhat.com/security/updates/classification/"
},
"type": "Red Hat severity rating"
}
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"format": "CVSS"
}
],
"descriptions": [
{
"lang": "en",
"value": "A heap-buffer-overflow flaw was found in Directory Server (389-ds-base). When a DN contains a legacy-quoted value, the server won't close the heap allocation allowing another call to refer to the same memory pointer causing a denial of service or an arbitrary memory write operation."
}
],
"affected": [
{
"vendor": "Red Hat",
"product": "Red Hat Directory Server 11",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "redhat-ds:11/389-ds-base",
"defaultStatus": "affected",
"cpes": [
"cpe:/a:redhat:directory_server:11"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Directory Server 12",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "redhat-ds:12/389-ds-base",
"defaultStatus": "affected",
"cpes": [
"cpe:/a:redhat:directory_server:12"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Directory Server 13",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "389-ds-base",
"defaultStatus": "affected",
"cpes": [
"cpe:/a:redhat:directory_server:13"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 10",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "389-ds-base",
"defaultStatus": "affected",
"cpes": [
"cpe:/a:redhat:enterprise_linux:10"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 6",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "389-ds-base",
"defaultStatus": "affected",
"cpes": [
"cpe:/o:redhat:rhel_els:6"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 7",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "389-ds-base",
"defaultStatus": "affected",
"cpes": [
"cpe:/o:redhat:rhel_els:7"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 8",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "389-ds-base",
"defaultStatus": "affected",
"cpes": [
"cpe:/a:redhat:enterprise_linux:8"
]
},
{
"vendor": "Red Hat",
"product": "Red Hat Enterprise Linux 9",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"packageName": "389-ds-base",
"defaultStatus": "affected",
"cpes": [
"cpe:/a:redhat:enterprise_linux:9"
]
}
],
"references": [
{
"url": "https://access.redhat.com/security/cve/CVE-2026-16560",
"tags": [
"vdb-entry",
"x_refsource_REDHAT"
]
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2506102",
"name": "RHBZ#2506102",
"tags": [
"issue-tracking",
"x_refsource_REDHAT"
]
}
],
"datePublic": "2026-07-22T12:00:00.000Z",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1220",
"description": "Insufficient Granularity of Access Control",
"lang": "en",
"type": "CWE"
}
]
}
],
"x_redhatCweChain": "CWE-1220: Insufficient Granularity of Access Control",
"workarounds": [
{
"lang": "en",
"value": "Denial of service is more reliably observed\nwhen heap debugging is enabled (for example AddressSanitizer or MALLOC_CHECK_=3),\nor depending on heap layout and subsequent memory allocator activity. For this\nreason Red Hat rates availability impact as Low (A:L) rather than High.\nThere is no configuration switch to disable DN normalization for client-supplied DNs.\nThe vulnerable code path is present in all currently supported 389-ds-base versions\nthat ship the quoted-RDN parsing logic in dn.c."
}
],
"timeline": [
{
"lang": "en",
"time": "2026-07-22T11:59:36.087Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-07-22T12:00:00.000Z",
"value": "Made public."
}
],
"credits": [
{
"lang": "en",
"value": "Red Hat would like to thank Denis Rastyogin (ALT Linux) for reporting this issue."
}
],
"providerMetadata": {
"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"shortName": "redhat",
"dateUpdated": "2026-11-05T19:24:06.831Z"
},
"x_generator": {
"engine": "cvelib 1.8.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-07-22T18:01:40.896935Z",
"id": "CVE-2026-16560",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-07-22T18:01:52.422Z"
}
}
]
}
}