SUSE-SU-2026:1618-1
Vulnerability from csaf_suse - Published: 2026-04-24 14:25 - Updated: 2026-04-24 14:25Summary
Security update for dnsdist
Severity
Moderate
Notes
Title of the patch: Security update for dnsdist
Description of the patch: This update for dnsdist fixes the following issues:
Update to version 1.9.12.
- https://www.dnsdist.org/changelog.html#change-1.9.12
Security issues fixed:
- CVE-2026-0396: crafted DNS queries triggering domain-based dynamic rules can lead to HTML injection in the web
dashboard (bsc#1261236).
- CVE-2026-0397: misconfiguration of the CORS policy can lead to information disclosure (bsc#1261237).
- CVE-2026-24028: crafted DNS packet parsed by Lua code using `newDNSPacketOverlay` can lead to an out-of-bounds read
(bsc#1261238).
- CVE-2026-24029: disabled option on a DNS over HTTPS nghttp2 frontend allows clients to bypass ACLs and send DoH
queries (bsc#1261239).
- CVE-2026-24030: crafted DoQ and DoH3 queries can lead to unbounded memory allocation and DoS (bsc#1261240).
- CVE-2026-27853: crafted DNS responses sent to a DNSdist using certain methods in custom Lua code (`changeName`) can
lead to an out-of-bounds write (bsc#1261243).
- CVE-2026-27854: crafted DNS queries sent to a DNSdist using the `DNSQuestion:getEDNSOptions` method in custom Lua
code can lead to a use-after-free (bsc#1261241).
Patchnames: SUSE-2026-1618,SUSE-SLE-Module-Basesystem-15-SP7-2026-1618
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
Affected products
Recommended
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
low
Affected products
Recommended
4 products, the same list as for
CVE-2026-0396
Threats
Impact
low
5.3 (Medium)
Affected products
Recommended
4 products, the same list as for
CVE-2026-0396
Threats
Impact
moderate
4.8 (Medium)
Affected products
Recommended
4 products, the same list as for
CVE-2026-0396
Threats
Impact
moderate
5.3 (Medium)
Affected products
Recommended
4 products, the same list as for
CVE-2026-0396
Threats
Impact
moderate
5.9 (Medium)
Affected products
Recommended
4 products, the same list as for
CVE-2026-0396
Threats
Impact
moderate
4.8 (Medium)
Affected products
Recommended
4 products, the same list as for
CVE-2026-0396
Threats
Impact
moderate
References
32 references
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"title": "CVE description"
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"text": "An attacker might be able to trigger an out-of-bounds read by sending a crafted DNS response packet, when custom Lua code uses newDNSPacketOverlay to parse DNS packets. The out-of-bounds read might trigger a crash, leading to a denial of service, or access unrelated memory, leading to potential information disclosure.",
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"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.x86_64"
]
}
],
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{
"category": "impact",
"date": "2026-04-24T14:25:54Z",
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}
],
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},
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"notes": [
{
"category": "general",
"text": "When the early_acl_drop (earlyACLDrop in Lua) option is disabled (default is enabled) on a DNS over HTTPs frontend using the nghttp2 provider, the ACL check is skipped, allowing all clients to send DoH queries regardless of the configured ACL.",
"title": "CVE description"
}
],
"product_status": {
"recommended": [
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.aarch64",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.ppc64le",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.s390x",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.x86_64"
]
},
"references": [
{
"category": "external",
"summary": "CVE-2026-24029",
"url": "https://www.suse.com/security/cve/CVE-2026-24029"
},
{
"category": "external",
"summary": "SUSE Bug 1261239 for CVE-2026-24029",
"url": "https://bugzilla.suse.com/1261239"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
"product_ids": [
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.aarch64",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.ppc64le",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.s390x",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"products": [
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.aarch64",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.ppc64le",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.s390x",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-04-24T14:25:54Z",
"details": "moderate"
}
],
"title": "CVE-2026-24029"
},
{
"cve": "CVE-2026-24030",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-24030"
}
],
"notes": [
{
"category": "general",
"text": "An attacker might be able to trick DNSdist into allocating too much memory while processing DNS over QUIC or DNS over HTTP/3 payloads, resulting in a denial of service. In setups with a large quantity of memory available this usually results in an exception and the QUIC connection is properly closed, but in some cases the system might enter an out-of-memory state instead and terminate the process.",
"title": "CVE description"
}
],
"product_status": {
"recommended": [
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.aarch64",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.ppc64le",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.s390x",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.x86_64"
]
},
"references": [
{
"category": "external",
"summary": "CVE-2026-24030",
"url": "https://www.suse.com/security/cve/CVE-2026-24030"
},
{
"category": "external",
"summary": "SUSE Bug 1261240 for CVE-2026-24030",
"url": "https://bugzilla.suse.com/1261240"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
"product_ids": [
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.aarch64",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.ppc64le",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.s390x",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"products": [
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.aarch64",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.ppc64le",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.s390x",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-04-24T14:25:54Z",
"details": "moderate"
}
],
"title": "CVE-2026-24030"
},
{
"cve": "CVE-2026-27853",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-27853"
}
],
"notes": [
{
"category": "general",
"text": "An attacker might be able to trigger an out-of-bounds write by sending crafted DNS responses to a DNSdist using the DNSQuestion:changeName or DNSResponse:changeName methods in custom Lua code. In some cases the rewritten packet might become larger than the initial response and even exceed 65535 bytes, potentially leading to a crash resulting in denial of service.",
"title": "CVE description"
}
],
"product_status": {
"recommended": [
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.aarch64",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.ppc64le",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.s390x",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.x86_64"
]
},
"references": [
{
"category": "external",
"summary": "CVE-2026-27853",
"url": "https://www.suse.com/security/cve/CVE-2026-27853"
},
{
"category": "external",
"summary": "SUSE Bug 1261241 for CVE-2026-27853",
"url": "https://bugzilla.suse.com/1261241"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
"product_ids": [
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.aarch64",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.ppc64le",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.s390x",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.aarch64",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.ppc64le",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.s390x",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-04-24T14:25:54Z",
"details": "moderate"
}
],
"title": "CVE-2026-27853"
},
{
"cve": "CVE-2026-27854",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-27854"
}
],
"notes": [
{
"category": "general",
"text": "An attacker might be able to trigger a use-after-free by sending crafted DNS queries to a DNSdist using the DNSQuestion:getEDNSOptions method in custom Lua code. In some cases DNSQuestion:getEDNSOptions might refer to a version of the DNS packet that has been modified, thus triggering a use-after-free and potentially a crash resulting in denial of service.",
"title": "CVE description"
}
],
"product_status": {
"recommended": [
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.aarch64",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.ppc64le",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.s390x",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.x86_64"
]
},
"references": [
{
"category": "external",
"summary": "CVE-2026-27854",
"url": "https://www.suse.com/security/cve/CVE-2026-27854"
},
{
"category": "external",
"summary": "SUSE Bug 1261243 for CVE-2026-27854",
"url": "https://bugzilla.suse.com/1261243"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
"product_ids": [
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.aarch64",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.ppc64le",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.s390x",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L",
"version": "3.1"
},
"products": [
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.aarch64",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.ppc64le",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.s390x",
"SUSE Linux Enterprise Module for Basesystem 15 SP7:dnsdist-1.9.12-150700.3.9.1.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-04-24T14:25:54Z",
"details": "moderate"
}
],
"title": "CVE-2026-27854"
}
]
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.