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Fencer Vulns
high 7.1

CVE-2025-71436 json

Raptor RDF Syntax Library 2.0.15 through 2.0.16 Heap Buffer Overflow via Language Tag

published 2026-10-20 19 d ago modified 2026-10-28 11 d ago also EUVD-2025-211138

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

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.

Patch / fix

  • raptor2 AlmaLinux 8 2.0.15-18.el8_10

almalinux advisories ALSA-2026:94519

  • raptor2 Rocky Linux 8 2.0.15-18.el8_10

rocky linux advisories RLSA-2026:94519

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-71436 updated cvss 7.1

raptor2: raptor2: arbitrary code execution via heap-based buffer overflow in language tag handling

  • Red Hat Enterprise Linux 6 raptor
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 9 raptor2
    affected: workaround, no fix available
  • 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, raptor2-debuginfo 2.0.15-18.el8_10, raptor2-debugsource 2.0.15-18.el8_10
    fixed: vendor fix RHSA-2026:94519
  • Red Hat Enterprise Linux 7 raptor2
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
19 d ago

Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/dajobe/raptor/issues/83 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • librdf Raptor RDF Syntax Library

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.