Vulnerability-Lookup

OPENSUSE-SU-2026:20938-1

Vulnerability from csaf_opensuse - Published: 2026-06-10 11:47 - Updated: 2026-09-17 17:34

Summary

Security update for perl-YAML-Syck

Severity

Important

Notes

Title of the patch: Security update for perl-YAML-Syck

Description of the patch: This update for perl-YAML-Syck fixes the following issues: Changes in perl-YAML-Syck: - CVE-2026-5089: prevent buffer underflow in base60 (sexagesimal) parsing (PR #133) (bsc#1265155).

Patchnames: openSUSE-Leap-16.0-packagehub-306

CVE-2026-5089

Affected products

Recommended 4 products

Product	Version	Remediation
Unresolved product id: openSUSE Leap 16.0:perl-YAML-Syck-0:1.450.0-bp160.2.1.aarch64	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:perl-YAML-Syck-0:1.450.0-bp160.2.1.ppc64le	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:perl-YAML-Syck-0:1.450.0-bp160.2.1.s390x	—	Vendor Fix
Unresolved product id: openSUSE Leap 16.0:perl-YAML-Syck-0:1.450.0-bp160.2.1.x86_64	—	Vendor Fix

Threats

Impact important

References

6 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/o…	self
https://bugzilla.suse.com/1265155	self
https://www.suse.com/security/cve/CVE-2026-5089/	self
https://www.suse.com/security/cve/CVE-2026-5089	external
https://bugzilla.suse.com/1265155	external

JSON

To clipboard

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}

CVE-2026-5089 (GCVE-0-2026-5089)

Vulnerability from cvelistv5 – Published: 2026-05-12 16:14 – Updated: 2026-05-14 13:51

Title

YAML::Syck versions before 1.38 for Perl has an out-of-bounds read

Summary

YAML::Syck versions before 1.38 for Perl has an out-of-bounds read. The base60 (sexagesimal) parsing code in perl_syck.h has a buffer underflow bug in both int#base60 and float#base60 handlers. When processing the leftmost segment of a colon-separated value (e.g., the 1 in 1:30:45), the inner while loop can decrement a pointer past the start of the string buffer: while ( colon >= ptr && *colon != ':' ) { colon--; } if ( *colon == ':' ) *colon = '\0'; // colon may be ptr-1 here When no colon is found (final/leftmost segment), colon becomes ptr-1, and the subsequent *colon dereference reads one byte before the allocated buffer.

Severity

7.3 (High)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-14 13:50 UTC

CWE

CWE-124 - Buffer Underwrite ('Buffer Underflow')

Assigner

CPANSec redhat root

References

5 references

URL	Tags
https://metacpan.org/release/TODDR/YAML-Syck-1.38…	release-notes
https://github.com/cpan-authors/YAML-Syck/issues/132	issue-tracking
https://github.com/cpan-authors/YAML-Syck/pull/133	issue-tracking
https://github.com/cpan-authors/YAML-Syck/commit/…	patch
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
TODDR	YAML::Syck	Affected: 0 , < 1.38 (custom)

Show details on NVD website

JSON

To clipboard

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        "providerMetadata": {
          "dateUpdated": "2026-05-12T18:35:46.042Z",
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        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/05/12/16"
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        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "baseScore": 7.3,
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              "confidentialityImpact": "LOW",
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                  {
                    "Automatable": "yes"
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                "role": "CISA Coordinator",
                "timestamp": "2026-05-14T13:50:53.123874Z",
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            "tags": [
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            "url": "https://github.com/cpan-authors/YAML-Syck/issues/132"
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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.

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

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Action not permitted

OPENSUSE-SU-2026:20938-1

CVE-2026-5089 (GCVE-0-2026-5089)

Tags

Sightings

Nomenclature

Related by attack behaviour