cve-2026-73508
HIGH CVSS 7.5 csaf_redhat
Description
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
Timeline
- Published
- 2026-08-13 14:27 UTC
- Last Modified
- 2026-09-04
CVSS Details
CVSS details not available.
Affected Products
No product information available.
Weaknesses (CWE)
References
No references available.
Linked Vulnerabilities
No linked vulnerabilities found.
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"discovery_date": "2026-08-13T15:11:47.778030+00:00",
"flags": [
{
"label": "vulnerable_code_not_present",
"product_ids": [
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"red_hat_build_of_keycloak:keycloak/rhbk-rhel9-operator",
"red_hat_build_of_keycloak:netty-codec-dns",
"red_hat_build_of_quarkus:netty-codec-dns"
]
},
{
"label": "vulnerable_code_not_in_execute_path",
"product_ids": [
"red_hat_fuse_7:netty-codec-dns",
"red_hat_openshift_ai_(rhoai):rhoai/odh-th06-cpu-torch210-py312-rhel9",
"red_hat_openshift_ai_(rhoai):rhoai/odh-th06-cuda130-torch210-py312-rhel9",
"red_hat_openshift_ai_(rhoai):rhoai/odh-th06-rocm64-torch291-py312-rhel9"
]
}
],
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2515377"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Netty, an asynchronous network application framework. When processing malformed domain names in DNS packets, the DNS record decoder fails to release allocated memory. This vulnerability allows an unauthenticated remote attacker to incrementally leak direct memory, eventually leading to a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "io.netty/netty-codec-dns: Netty: Denial of Service via Memory Leak in DNS Record Decoder with Malformed Domain Names",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This flaw is rated Important because the affected component fails to release allocated memory when it rejects a malformed domain name during DNS record decoding. An unauthenticated remote attacker who can send DNS traffic to an application using the affected DNS resolution functionality can incrementally exhaust available memory until the process becomes unresponsive, resulting in a complete denial of service.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"known_affected": [
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-73508"
},
{
"category": "external",
"summary": "RHBZ#2515377",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2515377"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-73508",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-73508"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-73508",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73508"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b",
"url": "https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6",
"url": "https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/releases/tag/netty-4.1.136.Final",
"url": "https://github.com/netty/netty/releases/tag/netty-4.1.136.Final"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/releases/tag/netty-4.2.16.Final",
"url": "https://github.com/netty/netty/releases/tag/netty-4.2.16.Final"
},
{
"category": "external",
"summary": "https://github.com/netty/netty/security/advisories/GHSA-mfg7-5gfp-c4w3",
"url": "https://github.com/netty/netty/security/advisories/GHSA-mfg7-5gfp-c4w3"
}
],
"release_date": "2026-08-13T14:27:20.298000+00:00",
"remediations": [
{
"category": "workaround",
"details": "Red Hat recommends upgrading to a fixed version as the primary remediation. Where an immediate upgrade is not possible, restrict network access so that only trusted DNS servers and trusted network peers can send DNS traffic to the affected application, using firewall or network policy rules to block or rate-limit DNS traffic from untrusted sources. This reduces exposure to the malformed DNS records that trigger the issue but does not fully eliminate it; upgrading remains the only complete fix.",
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],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"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:H",
"version": "3.1"
},
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"red_hat_openshift_ai_(rhoai):rhoai/odh-th-torch-cuda-py312-rhel9",
"red_hat_openshift_ai_(rhoai):rhoai/odh-th06-cpu-torch210-py312-rhel9",
"red_hat_openshift_ai_(rhoai):rhoai/odh-th06-cpu-torch291-py312-rhel9",
"red_hat_openshift_ai_(rhoai):rhoai/odh-th06-cuda130-torch210-py312-rhel9",
"red_hat_openshift_ai_(rhoai):rhoai/odh-th06-cuda130-torch291-py312-rhel9",
"red_hat_openshift_ai_(rhoai):rhoai/odh-th06-rocm64-torch291-py312-rhel9",
"red_hat_openshift_ai_(rhoai):rhoai/odh-trustyai-service-rhel9",
"red_hat_openshift_dev_spaces:devspaces/multicluster-redirector-rhel9",
"red_hat_openshift_dev_spaces:devspaces/openvsx-rhel9",
"red_hat_openshift_dev_spaces:devspaces/pluginregistry-rhel9",
"red_hat_single_sign-on_7:netty-codec-dns"
]
}
],
"title": "io.netty/netty-codec-dns: Netty: Denial of Service via Memory Leak in DNS Record Decoder with Malformed Domain Names"
}
]
}
Enrichment data
Aggregated bundle (all enrichments)