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TI-2025-43942 Aliases CVE-2025-71436GHSA-m7mm-cj97-2wxq

Heap buffer overflow in Raptor RDF Syntax Library via language tags

Priority MEDIUM 64CWE-122Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · Low · High
Fix status
Partial Red Hat: 2 fixed, 2 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

Raptor RDF Syntax Library from 2.0.15 through 2.0.16 contains a heap buffer overflow (CWE-122) in raptor_new_term_from_counted_literal(). The function truncates language tag lengths to an unsigned char, so tags of 256 bytes or longer overflow the heap. An attacker who supplies a crafted Turtle, TriG, N-Triples or N-Quads document can corrupt heap memory and crash the application, and possibly execute code. A proof-of-concept exploit is reported.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Raptor RDF Syntax Library from 2.0.15 through 2.0.16 contains a heap-based buffer overflow vulnerability in raptor_new_term_from_counted_literal() caused by truncating language tag length to an unsigned char. Attackers can supply Turtle, TriG, N-Triples or N-Quads documents with language tags of 256 bytes or longer to corrupt heap memory, crash applications, and possibly execute code.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00496 42nd percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 2 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
librdfRaptor RDF Syntax Library2.0.15 – 2.0.16—No fix listedCNA
  • Raptor RDF Syntax Library Vendorlibrdf Affected 2.0.15 – 2.0.16 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Raptor RDF Syntax Library. Red Hat fixes Red Hat Enterprise Linux AppStream (version 8) and Red Hat Enterprise Linux CRB (version 8) in RHSA-2026:94519. Red Hat Enterprise Linux 6 has no fix planned, and Red Hat Enterprise Linux 9 has no fix available.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Red Hat 1 advisory

  • RHSA-2026:94519 Released 2026-11-03 · Red Hat rating Important
    raptor2 security update
    • Red Hat Enterprise Linux AppStream (v. 8) raptor2-2.0.15-18.el8_10
    • Red Hat Enterprise Linux CRB (v. 8) raptor2-devel-2.0.15-18.el8_10

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:94519
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:94519
Not affected: 1 product
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-20 Threatist record created from CVE-2025-71436
  2. 2026-10-20 CISA SSVC decision points changed
  3. 2026-10-21 Alias added: GHSA-m7mm-cj97-2wxq
  4. 2026-10-21 Affected versions changed · Red Hat
  5. 2026-10-21 CVSS score added · Red Hat
  6. 2026-10-24 Affected versions changed · Red Hat
  7. 2026-11-03 Fix available: RHSA-2026:94519 · Red Hat
  8. 2026-11-03 Fix available: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · Red Hat

References

Patch 1

Other 3

  • TI-2024-38091 Integer underflow in librdf Raptor RDF Syntax Library CVSS 3.1CRITICAL 9.3
  • TI-2024-38090 Out-of-bounds read in librdf Raptor RDF Syntax Library CVSS 3.1MEDIUM 5.5
  • TI-2012-00036 Redland Raptor (aka libraptor) before 2.0.7, as used by OpenOffice 3.3 and 3.4 Beta… CVSS 3.1MEDIUM 6.5
  • TI-2017-14074 raptor_xml_writer_start_element_common in raptor_xml_writer.c in Raptor RDF Syntax… CVSS 3.1HIGH 7.1
  • TI-2020-15728 Improper input validation in raptor2 CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences