Vulnerability-Lookup

SUSE-SU-2026:3474-1

Vulnerability from csaf_suse - Published: 2026-08-03 16:45 - Updated: 2026-09-17 16:38

Summary

Security update for s390-tools

Severity

Moderate

Notes

Title of the patch: Security update for s390-tools

Description of the patch: This update for s390-tools fixes the following issue - CVE-2026-41676: openssl: `Deriver:derive` and `PkeyCtxRef:derive` can overflow short buffers on OpenSSL 1.1.1 (bsc#1270185).

Patchnames: SUSE-2026-3474,SUSE-SLE-Micro-5.3-2026-3474,SUSE-SLE-Micro-5.4-2026-3474

CVE-2026-41676

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Affected products

Recommended 8 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise Micro 5.3:libekmfweb1-0:2.31.0-150400.7.34.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.3:libkmipclient1-0:2.31.0-150400.7.34.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.3:s390-tools-0:2.31.0-150400.7.34.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.3:s390-tools-genprotimg-data-0:2.31.0-150400.7.34.1.noarch	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.4:libekmfweb1-0:2.31.0-150400.7.34.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.4:libkmipclient1-0:2.31.0-150400.7.34.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.4:s390-tools-0:2.31.0-150400.7.34.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Micro 5.4:s390-tools-genprotimg-data-0:2.31.0-150400.7.34.1.noarch	—	Vendor Fix

Threats

Impact moderate

References

9 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-updates/2026…	self
https://bugzilla.suse.com/1270185	self
https://www.suse.com/security/cve/CVE-2026-41676/	self
https://www.suse.com/security/cve/CVE-2026-41676	external
https://bugzilla.suse.com/1270137	external
https://bugzilla.suse.com/1271911	external

JSON

To clipboard

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  "vulnerabilities": [
    {
      "cve": "CVE-2026-41676",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-41676"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "rust-openssl provides OpenSSL bindings for the Rust programming language.  From 0.9.27 to before 0.10.78, Deriver::derive (and PkeyCtxRef::derive) sets len = buf.len() and passes it as the in/out length to EVP_PKEY_derive, relying on OpenSSL to honor it. On OpenSSL 1.1.x, X25519, X448, DH and HKDF-extract ignore the incoming *keylen, unconditionally writing the full shared secret (32/56/prime-size bytes). A caller passing a short slice gets a heap/stack overflow from safe code. OpenSSL 3.x providers do check, so this only impacts older OpenSSL. This vulnerability is fixed in 0.10.78.",
          "title": "CVE description"
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          "url": "https://www.suse.com/security/cve/CVE-2026-41676"
        },
        {
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          "summary": "SUSE Bug 1270137 for CVE-2026-41676",
          "url": "https://bugzilla.suse.com/1270137"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1271911 for CVE-2026-41676",
          "url": "https://bugzilla.suse.com/1271911"
        }
      ],
      "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",
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      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Micro 5.3:libekmfweb1-0:2.31.0-150400.7.34.1.s390x",
            "SUSE Linux Enterprise Micro 5.3:libkmipclient1-0:2.31.0-150400.7.34.1.s390x",
            "SUSE Linux Enterprise Micro 5.3:s390-tools-0:2.31.0-150400.7.34.1.s390x",
            "SUSE Linux Enterprise Micro 5.3:s390-tools-genprotimg-data-0:2.31.0-150400.7.34.1.noarch",
            "SUSE Linux Enterprise Micro 5.4:libekmfweb1-0:2.31.0-150400.7.34.1.s390x",
            "SUSE Linux Enterprise Micro 5.4:libkmipclient1-0:2.31.0-150400.7.34.1.s390x",
            "SUSE Linux Enterprise Micro 5.4:s390-tools-0:2.31.0-150400.7.34.1.s390x",
            "SUSE Linux Enterprise Micro 5.4:s390-tools-genprotimg-data-0:2.31.0-150400.7.34.1.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-03T16:45:57Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-41676"
    }
  ]
}

CVE-2026-41676 (GCVE-0-2026-41676)

Vulnerability from cvelistv5 – Published: 2026-04-24 17:16 – Updated: 2026-04-24 17:43

Title

rust-openssl: Deriver::derive and PkeyCtxRef::derive can overflow short buffers on OpenSSL 1.1.1

Summary

rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.27 to before 0.10.78, Deriver::derive (and PkeyCtxRef::derive) sets len = buf.len() and passes it as the in/out length to EVP_PKEY_derive, relying on OpenSSL to honor it. On OpenSSL 1.1.x, X25519, X448, DH and HKDF-extract ignore the incoming *keylen, unconditionally writing the full shared secret (32/56/prime-size bytes). A caller passing a short slice gets a heap/stack overflow from safe code. OpenSSL 3.x providers do check, so this only impacts older OpenSSL. This vulnerability is fixed in 0.10.78.

Severity

7.2 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-24 17:43 UTC

CWE

CWE-787 - Out-of-bounds Write
CWE-131 - Incorrect Calculation of Buffer Size

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7820 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/rust-openssl/rust-openssl/secu…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
rust-openssl	rust-openssl	Affected: >= 0.9.27, < 0.10.78

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-41676",
                "options": [
                  {
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                  },
                  {
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                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-24T17:43:14.622885Z",
                "version": "2.0.3"
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
      "affected": [
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U",
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      "providerMetadata": {
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      "title": "rust-openssl: Deriver::derive and PkeyCtxRef::derive can overflow short buffers on OpenSSL 1.1.1"
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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

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.

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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