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High 7.5Published Jun 12, 2025

CVE-2025-6021Libxml2: integer overflow in xmlbuildqname() leads to stack buffer overflow in libxml2

Updated under an hour ago ()

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It affects Red Hat Enterprise Linux 10 and 30 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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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.

CVSS
7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE)
CWE-787
Known exploited
Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days)
Not loaded for this CVE
Assigned by
redhat
NVD analysis
Modified
Record last updated
Oct 12, 2026
First seen by InfoSec Signals
Oct 12, 2026

Affected products

Affected products
from 0:2.12.5-7.el10_0 not affected
CNA record
from 0:2.9.1-6.el7_9.10 not affected
CNA record
from 0:2.9.7-9.el8_2.3 not affected
CNA record
from 0:2.9.7-9.el8_4.6 not affected
CNA record
from 0:2.9.7-13.el8_6.10 not affected
CNA record
from 0:2.9.7-13.el8_6.10 not affected
CNA record
from 0:2.9.13-10.el9_4 not affected
CNA record
1.0
CNA record
from 412.86.202509030110-0 not affected
CNA record
from 2.0.1-1754478727 not affected
CNA record

References

References

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

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