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Fencer Intel
high 7.5

CVE-2025-61021 json

An issue in the sqlo_natural_join_cond component of openlink virtuoso-opensource v7.2.11 allows attackers to cause a Denial of Service (DoS…

published 4mo ago modified 27d ago also EUVD-2025-210316

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

An issue in the sqlo_natural_join_cond component of openlink virtuoso-opensource v7.2.11 allows attackers to cause a Denial of Service (DoS) via crafted SQL statements.

Patch / fix

  • virtuoso-opensource Debian 14, Debian 13 7.2.12+dfsg-0.2

debian advisories DEBIAN-CVE-2025-61021

  • virtuoso-opensource RHEL 7 ELS 1:6.1.6-9.el7_9
  • virtuoso-opensource-utils RHEL 7 ELS 1:6.1.6-9.el7_9

red hat advisories RHSA-2026:66026

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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-2025-61021 updated cvss 7.5

virtuoso-opensource: Openlink Virtuoso-opensource: Denial of Service via crafted SQL statements

  • Red Hat Enterprise Linux Server (v. 7 ELS) virtuoso-opensource 6.1.6-9.el7_9 Red Hat Enterprise Linux Server Optional (v. 7 ELS) virtuoso-opensource 6.1.6-9.el7_9, virtuoso-opensource-utils 6.1.6-9.el7_9
    fixed: vendor fix RHSA-2026:66026

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
yes
Technical impact
partial
Assessed
4mo ago

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/openlink/virtuoso-opensource/issues/1223 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Classification

Weakness
  • CWE-89 Improper Neutralization of Special Elements used in an SQL Command

References

Sources

Fencer Intel 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.