SUSE-SU-2026:21440-1
Vulnerability from csaf_suse - Published: 2026-04-24 13:08 - Updated: 2026-09-16 19:45Summary
Security update for ovmf
Severity
Important
Notes
Title of the patch: Security update for ovmf
Description of the patch: This update for ovmf fixes the following issues:
- CVE-2026-25833: mbedtls: buffer overflow in the `x509_inet_pton_ipv6()` function (bsc#1261476).
- CVE-2026-25834: mbedtls: client accepts signature algorithm chosen by server even if not advertised in client hello
(bsc#1261477).
- CVE-2026-25835: mbedtls: no pseudo-random number generator reseed when cloning an application (bsc#1261478).
- CVE-2026-34874: mbedtls: NULL pointer dereference in distinguished name parsing (bsc#1261469).
Patchnames: SUSE-SLE-Micro-6.0-695,SUSE-SLE-Micro-6.1-508
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
7.5 (High)
Affected products
Recommended
8 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Linux Micro 6.0:curl-8.14.1-6.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Micro 6.0:curl-8.14.1-6.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Micro 6.0:curl-8.14.1-6.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Micro 6.1:qemu-ovmf-x86_64-202402-slfo.1.1_3.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Micro 6.1:qemu-uefi-aarch64-202402-slfo.1.1_3.1.noarch | — |
Vendor Fix
|
Threats
Impact
important
6.5 (Medium)
Affected products
Recommended
8 products, the same list as for
CVE-2026-25833
Threats
Impact
moderate
7.7 (High)
Affected products
Recommended
8 products, the same list as for
CVE-2026-25833
Threats
Impact
important
7.5 (High)
Affected products
Recommended
8 products, the same list as for
CVE-2026-25833
Threats
Impact
important
References
24 references
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"vulnerabilities": [
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}
],
"notes": [
{
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"text": "Mbed TLS 3.5.0 to 3.6.5 fixed in 3.6.6 and 4.1.0 has a buffer overflow in the x509_inet_pton_ipv6() function",
"title": "CVE description"
}
],
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"scores": [
{
"cvss_v3": {
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"baseSeverity": "HIGH",
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},
{
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"text": "https://www.suse.com/security/cve/CVE-2026-25834"
}
],
"notes": [
{
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"text": "Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.",
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}
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},
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}
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"SUSE Linux Micro 6.1:qemu-uefi-aarch64-202402-slfo.1.1_3.1.noarch"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
"version": "3.1"
},
"products": [
"SUSE Linux Micro 6.0:curl-8.14.1-6.1.aarch64",
"SUSE Linux Micro 6.0:curl-8.14.1-6.1.s390x",
"SUSE Linux Micro 6.0:curl-8.14.1-6.1.x86_64",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.aarch64",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.s390x",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.x86_64",
"SUSE Linux Micro 6.1:qemu-ovmf-x86_64-202402-slfo.1.1_3.1.noarch",
"SUSE Linux Micro 6.1:qemu-uefi-aarch64-202402-slfo.1.1_3.1.noarch"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-04-24T13:08:28Z",
"details": "moderate"
}
],
"title": "CVE-2026-25834"
},
{
"cve": "CVE-2026-25835",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-25835"
}
],
"notes": [
{
"category": "general",
"text": "Mbed TLS before 3.6.6 and TF-PSA-Crypto before 1.1.0 misuse seeds in a Pseudo-Random Number Generator (PRNG).",
"title": "CVE description"
}
],
"product_status": {
"recommended": [
"SUSE Linux Micro 6.0:curl-8.14.1-6.1.aarch64",
"SUSE Linux Micro 6.0:curl-8.14.1-6.1.s390x",
"SUSE Linux Micro 6.0:curl-8.14.1-6.1.x86_64",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.aarch64",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.s390x",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.x86_64",
"SUSE Linux Micro 6.1:qemu-ovmf-x86_64-202402-slfo.1.1_3.1.noarch",
"SUSE Linux Micro 6.1:qemu-uefi-aarch64-202402-slfo.1.1_3.1.noarch"
]
},
"references": [
{
"category": "external",
"summary": "CVE-2026-25835",
"url": "https://www.suse.com/security/cve/CVE-2026-25835"
},
{
"category": "external",
"summary": "SUSE Bug 1261478 for CVE-2026-25835",
"url": "https://bugzilla.suse.com/1261478"
},
{
"category": "external",
"summary": "SUSE Bug 1262727 for CVE-2026-25835",
"url": "https://bugzilla.suse.com/1262727"
}
],
"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 Micro 6.0:curl-8.14.1-6.1.aarch64",
"SUSE Linux Micro 6.0:curl-8.14.1-6.1.s390x",
"SUSE Linux Micro 6.0:curl-8.14.1-6.1.x86_64",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.aarch64",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.s390x",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.x86_64",
"SUSE Linux Micro 6.1:qemu-ovmf-x86_64-202402-slfo.1.1_3.1.noarch",
"SUSE Linux Micro 6.1:qemu-uefi-aarch64-202402-slfo.1.1_3.1.noarch"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.7,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"products": [
"SUSE Linux Micro 6.0:curl-8.14.1-6.1.aarch64",
"SUSE Linux Micro 6.0:curl-8.14.1-6.1.s390x",
"SUSE Linux Micro 6.0:curl-8.14.1-6.1.x86_64",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.aarch64",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.s390x",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.x86_64",
"SUSE Linux Micro 6.1:qemu-ovmf-x86_64-202402-slfo.1.1_3.1.noarch",
"SUSE Linux Micro 6.1:qemu-uefi-aarch64-202402-slfo.1.1_3.1.noarch"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-04-24T13:08:28Z",
"details": "important"
}
],
"title": "CVE-2026-25835"
},
{
"cve": "CVE-2026-34874",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-34874"
}
],
"notes": [
{
"category": "general",
"text": "An issue was discovered in Mbed TLS through 3.6.5 and 4.x through 4.0.0. There is a NULL pointer dereference in distinguished name parsing that allows an attacker to write to address 0.",
"title": "CVE description"
}
],
"product_status": {
"recommended": [
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"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.aarch64",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.s390x",
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"SUSE Linux Micro 6.1:qemu-uefi-aarch64-202402-slfo.1.1_3.1.noarch"
]
},
"references": [
{
"category": "external",
"summary": "CVE-2026-34874",
"url": "https://www.suse.com/security/cve/CVE-2026-34874"
},
{
"category": "external",
"summary": "SUSE Bug 1261469 for CVE-2026-34874",
"url": "https://bugzilla.suse.com/1261469"
},
{
"category": "external",
"summary": "SUSE Bug 1262646 for CVE-2026-34874",
"url": "https://bugzilla.suse.com/1262646"
}
],
"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 Micro 6.0:curl-8.14.1-6.1.aarch64",
"SUSE Linux Micro 6.0:curl-8.14.1-6.1.s390x",
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"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.aarch64",
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"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.x86_64",
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"SUSE Linux Micro 6.1:qemu-uefi-aarch64-202402-slfo.1.1_3.1.noarch"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
"SUSE Linux Micro 6.0:curl-8.14.1-6.1.aarch64",
"SUSE Linux Micro 6.0:curl-8.14.1-6.1.s390x",
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"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.aarch64",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.s390x",
"SUSE Linux Micro 6.0:libcurl4-8.14.1-6.1.x86_64",
"SUSE Linux Micro 6.1:qemu-ovmf-x86_64-202402-slfo.1.1_3.1.noarch",
"SUSE Linux Micro 6.1:qemu-uefi-aarch64-202402-slfo.1.1_3.1.noarch"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-04-24T13:08:28Z",
"details": "important"
}
],
"title": "CVE-2026-34874"
}
]
}
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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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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.
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