RHSA-2026:7412
Vulnerability from csaf_redhat - Published: 2026-04-10 18:39 - Updated: 2026-05-22 02:11Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
bind:
* bind-9.18.48-1.1.hum1 (aarch64, x86_64)
* bind-chroot-9.18.48-1.1.hum1 (aarch64, x86_64)
* bind-devel-9.18.48-1.1.hum1 (aarch64, x86_64)
* bind-dnssec-utils-9.18.48-1.1.hum1 (aarch64, x86_64)
* bind-doc-9.18.48-1.1.hum1 (noarch)
* bind-libs-9.18.48-1.1.hum1 (aarch64, x86_64)
* bind-utils-9.18.48-1.1.hum1 (aarch64, x86_64)
* bind-9.18.48-1.1.hum1.src (src)
Terms of Use: 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.
A flaw was found in the BIND (Berkeley Internet Name Domain) DNS-over-HTTPS implementation. A remote attacker could send specially crafted HTTP/2 traffic to a DNS-over-HTTPS endpoint, leading to a use-after-free vulnerability. This could trigger memory corruption, potentially allowing the attacker to cause a denial of service or, in some cases, execute arbitrary code.
7.4 (High)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:bind-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:bind-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:bind-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:bind-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
A flaw was found in BIND. A remote attacker could exploit a race condition during SIG(0) signature validation of an incoming DNS message. If the "recursive-clients" limit is reached and the message is discarded, a use-after-free vulnerability may occur. This could lead to undefined behavior and potentially result in a denial of service.
7.5 (High)
Affected products
Fixed
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:bind-main@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:bind-main@noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:bind-main@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:bind-main@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
References
14 references
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"text": "A flaw was found in the BIND (Berkeley Internet Name Domain) DNS-over-HTTPS implementation. A remote attacker could send specially crafted HTTP/2 traffic to a DNS-over-HTTPS endpoint, leading to a use-after-free vulnerability. This could trigger memory corruption, potentially allowing the attacker to cause a denial of service or, in some cases, execute arbitrary code.",
"title": "Vulnerability description"
},
{
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"text": "bind: Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation",
"title": "Vulnerability summary"
},
{
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"text": "Important: A heap use-after-free vulnerability in BIND\u0027s DNS-over-HTTPS implementation allows a remote attacker to trigger memory corruption by sending crafted HTTP/2 traffic to a DNS-over-HTTPS endpoint. This affects both authoritative servers and resolvers configured to use DNS-over-HTTPS, potentially leading to denial of service or other impacts.",
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},
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"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
"Red Hat Hardened Images:bind-main@aarch64",
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"Red Hat Hardened Images:bind-main@x86_64"
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"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
"product_ids": [
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"Red Hat Hardened Images:bind-main@noarch",
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"Red Hat Hardened Images:bind-main@x86_64"
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"Red Hat Hardened Images:bind-main@x86_64"
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"baseScore": 7.4,
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"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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}
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"title": "bind: Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation"
},
{
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"cwe": {
"id": "CWE-367",
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},
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"ids": [
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"text": "2479772"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in BIND. A remote attacker could exploit a race condition during SIG(0) signature validation of an incoming DNS message. If the \"recursive-clients\" limit is reached and the message is discarded, a use-after-free vulnerability may occur. This could lead to undefined behavior and potentially result in a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "bind: SIG(0) validation during query flood may lead to undefined behavior",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "Important: A race condition in BIND\u0027s SIG(0) validation process can lead to undefined behavior and a denial of service when the server is under a query flood and processing signed DNS messages. This flaw could disrupt critical DNS resolution services in Red Hat environments.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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"Red Hat Hardened Images:bind-main@src",
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"summary": "Canonical URL",
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{
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"date": "2026-04-10T18:39:00+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
"product_ids": [
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"Red Hat Hardened Images:bind-main@noarch",
"Red Hat Hardened Images:bind-main@src",
"Red Hat Hardened Images:bind-main@x86_64"
],
"restart_required": {
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"url": "https://access.redhat.com/errata/RHSA-2026:7412"
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{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
"product_ids": [
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"Red Hat Hardened Images:bind-main@noarch",
"Red Hat Hardened Images:bind-main@src",
"Red Hat Hardened Images:bind-main@x86_64"
]
}
],
"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"
},
"products": [
"Red Hat Hardened Images:bind-main@aarch64",
"Red Hat Hardened Images:bind-main@noarch",
"Red Hat Hardened Images:bind-main@src",
"Red Hat Hardened Images:bind-main@x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "bind: SIG(0) validation during query flood may lead to undefined behavior"
}
]
}
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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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