CVE-2025-6021

HIGH
MEDIUM Priority: 0.11 BB Relevance: 75/100
Published: 2025-06-12 Modified: 2026-11-05 First seen: 2026-11-05 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: None
A: High

Description

A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of service when processing crafted input.

Weakness Classification (1)

References & Advisories (28)

https://access.redhat.com/errata/RHSA-2025:10630
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:10698
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:10699
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:11580
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:11673
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:12098
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:12099
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:12199
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:12237
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:12239
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:12240
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:12241
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:13267
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:13289
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:13325
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:13335
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:13336
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:14059
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:14396
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:15308
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:15672
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2025:19020
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:7519
vendor-advisory x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2372406
issue-tracking x_refsource_REDHAT
Showing 25 of 28 references

Bug Bounty Relevance

75 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

1.47%
Raw Score 0.014690
Percentile 74.1%
Date 2026-11-13

EPSS Trend

2026-11-13
0.01469
2026-11-12
0.01469
2026-11-10
0.01469
2026-11-09
0.01469
2026-11-08
0.01469
2026-11-07
0.01367
2026-11-06
0.01367
2026-11-05
0.01367

Intelligence Sources

mitre ref →
nvd ref →