FKIE_CVE-2026-11774
Vulnerability from fkie_nvd - Published: 2026-06-11 19:16 - Updated: 2026-07-08 13:16
Severity
7.6 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
7.6 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
7.6 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Summary
An integer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). In sasl_io_start_packet(), adding sizeof(uint32_t) to a crafted SASL packet length prefix of 0xFFFFFFFC causes unsigned wraparound to zero, bypassing the nsslapd-maxsasliosize limit and leading to a heap buffer overflow of up to approximately 2 megabytes of attacker-controlled data. After a successful SASL bind with integrity protection (SSF > 0), a remote attacker can cause a Denial of Service (DoS) or achieve Remote Code Execution (RCE). In FreeIPA and Red Hat Identity Management deployments, any domain user with a valid Kerberos ticket, enrolled host, or service account can trigger this vulnerability over the network. This flaw is independent of CVE-2025-14905, which patched schema.c only and did not modify sasl_io.c.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
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],
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"product": "Red Hat Directory Server 11.5 E4S for RHEL 8",
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]
},
{
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],
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"product": "Red Hat Directory Server 11.7 E4S for RHEL 8",
"vendor": "Red Hat",
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{
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"version": "8080020260702180836.f969626e",
"versionType": "rpm"
}
]
},
{
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],
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"vendor": "Red Hat",
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"version": "8100020260702145313.37ed7c03",
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}
]
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{
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],
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"packageName": "redhat-ds:12",
"product": "Red Hat Directory Server 12.2 E4S for RHEL 9",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "9020020260703060155.1674d574",
"versionType": "rpm"
}
]
},
{
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],
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]
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{
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],
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"packageName": "389-ds-base",
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"vendor": "Red Hat",
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{
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"status": "unaffected",
"version": "0:3.2.0-8.el10_2",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/o:redhat:enterprise_linux_eus:10.0"
],
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"packageName": "389-ds-base",
"product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "0:3.0.6-19.el10_0",
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}
]
},
{
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"cpes": [
"cpe:/o:redhat:rhel_els:7"
],
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"packageName": "389-ds-base",
"product": "Red Hat Enterprise Linux 7 Extended Lifecycle Support",
"vendor": "Red Hat",
"versions": [
{
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"versionType": "rpm"
}
]
},
{
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"cpes": [
"cpe:/a:redhat:enterprise_linux:8::appstream"
],
"defaultStatus": "affected",
"packageName": "389-ds:1.4",
"product": "Red Hat Enterprise Linux 8",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "8100020260626120929.25e700aa",
"versionType": "rpm"
}
]
},
{
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"cpes": [
"cpe:/a:redhat:rhel_aus:8.4::appstream",
"cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
],
"defaultStatus": "affected",
"packageName": "389-ds:1.4",
"product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "8040020260629123121.96015a92",
"versionType": "rpm"
}
]
},
{
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"cpes": [
"cpe:/a:redhat:rhel_aus:8.4::appstream",
"cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
],
"defaultStatus": "affected",
"packageName": "389-ds:1.4",
"product": "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
"vendor": "Red Hat",
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{
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}
]
},
{
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"cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
],
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"packageName": "389-ds:1.4",
"product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "8060020260626130540.824efc52",
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}
]
},
{
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"cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
],
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"packageName": "389-ds:1.4",
"product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
"vendor": "Red Hat",
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{
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"cpe:/a:redhat:rhel_tus:8.8::appstream"
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"packageName": "389-ds:1.4",
"product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
"vendor": "Red Hat",
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{
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}
]
},
{
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"cpes": [
"cpe:/a:redhat:rhel_e4s:8.8::appstream",
"cpe:/a:redhat:rhel_tus:8.8::appstream"
],
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"packageName": "389-ds:1.4",
"product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
"vendor": "Red Hat",
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"versionType": "rpm"
}
]
},
{
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"cpes": [
"cpe:/a:redhat:enterprise_linux:9::appstream",
"cpe:/a:redhat:enterprise_linux:9::crb"
],
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"packageName": "389-ds-base",
"product": "Red Hat Enterprise Linux 9",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "0:2.8.0-8.el9_8",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:rhel_e4s:9.2::appstream"
],
"defaultStatus": "affected",
"packageName": "389-ds-base",
"product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "0:2.2.4-19.el9_2",
"versionType": "rpm"
}
]
},
{
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"cpes": [
"cpe:/a:redhat:rhel_e4s:9.4::appstream"
],
"defaultStatus": "affected",
"packageName": "389-ds-base",
"product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "0:2.4.5-26.el9_4",
"versionType": "rpm"
}
]
},
{
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"cpes": [
"cpe:/a:redhat:rhel_eus:9.6::appstream",
"cpe:/a:redhat:rhel_eus:9.6::crb"
],
"defaultStatus": "affected",
"packageName": "389-ds-base",
"product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
"vendor": "Red Hat",
"versions": [
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"version": "0:2.6.1-22.el9_6",
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}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:directory_server:13.2::el10"
],
"defaultStatus": "affected",
"packageName": "dirsrv/dirsrv-container-rhel10",
"product": "Red Hat Directory Server 13.2",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "1783452100",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:directory_server:12"
],
"defaultStatus": "affected",
"packageName": "redhat-ds:12/389-ds-base",
"product": "Red Hat Directory Server 12",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:directory_server:13"
],
"defaultStatus": "unaffected",
"packageName": "389-ds-base",
"product": "Red Hat Directory Server 13",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/o:redhat:enterprise_linux:6"
],
"defaultStatus": "unaffected",
"packageName": "389-ds-base",
"product": "Red Hat Enterprise Linux 6",
"vendor": "Red Hat"
}
],
"source": "secalert@redhat.com"
},
{
"affectedData": [
{
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"cpe:/o:redhat:rhel_els:7"
],
"defaultStatus": "affected",
"product": "Red Hat Enterprise Linux Server (v. 7 ELS)",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/o:redhat:rhel_els:7"
],
"defaultStatus": "affected",
"product": "Red Hat Enterprise Linux Server Optional (v. 7 ELS)",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:directory_server:11.9::el8"
],
"defaultStatus": "affected",
"product": "Red Hat Directory Server 11.9 for RHEL 8",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/o:redhat:enterprise_linux_eus:10.0"
],
"defaultStatus": "affected",
"product": "Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
"vendor": "Red Hat"
},
{
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],
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"product": "Red Hat Enterprise Linux AppStream (v. 10)",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:enterprise_linux:8::appstream"
],
"defaultStatus": "affected",
"product": "Red Hat Enterprise Linux AppStream (v. 8)",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:rhel_aus:8.4::appstream"
],
"defaultStatus": "affected",
"product": "Red Hat Enterprise Linux AppStream AUS (v.8.4)",
"vendor": "Red Hat"
},
{
"cpes": [
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],
"defaultStatus": "affected",
"product": "Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:rhel_aus:8.6::appstream"
],
"defaultStatus": "affected",
"product": "Red Hat Enterprise Linux AppStream AUS (v.8.6)",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
],
"defaultStatus": "affected",
"product": "Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)",
"vendor": "Red Hat"
},
{
"cpes": [
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],
"defaultStatus": "affected",
"product": "Red Hat Enterprise Linux AppStream E4S (v.8.8)",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:rhel_tus:8.8::appstream"
],
"defaultStatus": "affected",
"product": "Red Hat Enterprise Linux AppStream TUS (v.8.8)",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:rhel_e4s:9.2::appstream"
],
"defaultStatus": "affected",
"product": "Red Hat Enterprise Linux AppStream E4S (v.9.2)",
"vendor": "Red Hat"
},
{
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],
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"vendor": "Red Hat"
},
{
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],
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"product": "Red Hat Enterprise Linux AppStream (v. 9)",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:directory_server_e4s:11.5::el8"
],
"defaultStatus": "affected",
"product": "Red Hat Directory Server 11.5 E4S for RHEL 8",
"vendor": "Red Hat"
},
{
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"cpe:/a:redhat:directory_server_e4s:11.7::el8"
],
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"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:directory_server_e4s:12.2::el9"
],
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"product": "Red Hat Directory Server 12.2 E4S for RHEL 9",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:directory_server_e4s:12.4::el9"
],
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"product": "Red Hat Directory Server 12.4 E4S for RHEL 9",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/o:redhat:enterprise_linux_eus:10.0"
],
"defaultStatus": "affected",
"product": "Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)",
"vendor": "Red Hat"
},
{
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"cpe:/o:redhat:enterprise_linux:10.2"
],
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"product": "Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:enterprise_linux:9::crb"
],
"defaultStatus": "affected",
"product": "Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:directory_server:13.2::el10"
],
"defaultStatus": "affected",
"product": "Red Hat Directory Server 13.2",
"vendor": "Red Hat"
},
{
"cpes": [
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],
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"product": "Red Hat Directory Server 12",
"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/a:redhat:directory_server:13"
],
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"vendor": "Red Hat"
},
{
"cpes": [
"cpe:/o:redhat:enterprise_linux:6"
],
"defaultStatus": "unaffected",
"product": "Red Hat Enterprise Linux 6",
"vendor": "Red Hat"
}
],
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "An integer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). In sasl_io_start_packet(), adding sizeof(uint32_t) to a crafted SASL packet length prefix of 0xFFFFFFFC causes unsigned wraparound to zero, bypassing the nsslapd-maxsasliosize limit and leading to a heap buffer overflow of up to approximately 2 megabytes of attacker-controlled data. After a successful SASL bind with integrity protection (SSF \u003e 0), a remote attacker can cause a Denial of Service (DoS) or achieve Remote Code Execution (RCE). In FreeIPA and Red Hat Identity Management deployments, any domain user with a valid Kerberos ticket, enrolled host, or service account can trigger this vulnerability over the network. This flaw is independent of CVE-2025-14905, which patched schema.c only and did not modify sasl_io.c."
}
],
"id": "CVE-2026-11774",
"lastModified": "2026-07-08T13:16:27.850",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.6,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.8,
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"source": "secalert@redhat.com",
"type": "Secondary"
},
{
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"baseScore": 7.6,
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"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H",
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},
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}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
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"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-12T15:14:06.174166Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-06-11T19:16:37.853",
"references": [
{
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"url": "https://access.redhat.com/errata/RHSA-2026:36195"
},
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},
{
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{
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{
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{
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{
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"url": "https://access.redhat.com/errata/RHSA-2026:36641"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2026:36660"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2026:36670"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2026:36671"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/security/cve/CVE-2026-11774"
},
{
"source": "secalert@redhat.com",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484916"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/errata/RHSA-2026:36195"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/errata/RHSA-2026:36196"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/errata/RHSA-2026:36197"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/errata/RHSA-2026:36198"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/errata/RHSA-2026:36200"
},
{
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"url": "https://access.redhat.com/errata/RHSA-2026:36201"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/errata/RHSA-2026:36202"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/errata/RHSA-2026:36204"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/errata/RHSA-2026:36205"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/errata/RHSA-2026:36206"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/errata/RHSA-2026:36208"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/errata/RHSA-2026:36209"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/errata/RHSA-2026:36585"
},
{
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"url": "https://access.redhat.com/errata/RHSA-2026:36641"
},
{
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{
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"url": "https://access.redhat.com/errata/RHSA-2026:36670"
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{
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"url": "https://access.redhat.com/security/cve/CVE-2026-11774"
},
{
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484916"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-11774.json"
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],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-190"
}
],
"source": "secalert@redhat.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-190"
}
],
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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