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NVD / CVE Program· CNA redhat

CVE-2025-49796: Libxml: type confusion leads to denial of service (dos)

Noroxi assessment

Priority: Monitor (action score 36/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.5% (FIRST EPSS); higher than 75.2% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: gitlab.gnome.org/GNOME/libxml2/ libxml2 2.15.0.

Low priority for now. Upgrade to gitlab.gnome.org/GNOME/libxml2/ libxml2 2.15.0 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to sensitive data being corrupted in memory.

CriticalCVSS 9.1 · v3.1—No exploit Fix available
Published
Jun 16, 2025
Updated
Oct 8, 2026
EPSS
1.5% · 75th percentile

Report tools

JSON

Action score

36

Monitor

Low priority for now.

CVSS
36 / 40 · 9.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.5%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
9.1
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • gitlab.gnome.org/GNOME/libxml2/ libxml2

    • before 2.15.0affected · semver

  • Red Hat cert-manager operator for Red Hat OpenShift 1.16

    • v1.16.5-1760515757 and laternot affected · rpm

  • Red Hat OpenShift File Integrity Operator - FIO 1

    • v1.3 and laternot affected · rpm

  • Red Hat Red Hat Discovery 2

    • 2.0.1-1754478727 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 10

    • 0:2.12.5-7.el10_0 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support

    • 0:2.9.1-6.el7_9.10 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8

    • 0:2.9.7-21.el8_10.1 and laternot affected · rpm
    • 0:2.9.7-21.el8_10.1 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support

    • 0:2.9.7-9.el8_2.3 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

    • 0:2.9.7-9.el8_4.6 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

    • 0:2.9.7-9.el8_4.6 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

    • 0:2.9.7-13.el8_6.10 and laternot affected · rpm

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10libxml2before 2.12.5-7.el10_02.12.5-7.el10_0
AlmaLinux:10libxml2-develbefore 2.12.5-7.el10_02.12.5-7.el10_0
AlmaLinux:10libxml2-staticbefore 2.12.5-7.el10_02.12.5-7.el10_0
AlmaLinux:10python3-libxml2before 2.12.5-7.el10_02.12.5-7.el10_0
AlmaLinux:8libxml2before 2.9.7-21.el8_10.12.9.7-21.el8_10.1
AlmaLinux:8libxml2-develbefore 2.9.7-21.el8_10.12.9.7-21.el8_10.1
AlmaLinux:8python3-libxml2before 2.9.7-21.el8_10.12.9.7-21.el8_10.1
AlmaLinux:9libxml2before 2.9.13-10.el9_62.9.13-10.el9_6
AlmaLinux:9libxml2-develbefore 2.9.13-10.el9_62.9.13-10.el9_6
AlmaLinux:9python3-libxml2before 2.9.13-10.el9_62.9.13-10.el9_6
Alpine:v3.21libxml2before 2.13.9-r02.13.9-r0
Debian:11libxml2before 2.9.10+dfsg-6.7+deb11u82.9.10+dfsg-6.7+deb11u8
Debian:12libxml2before 2.9.14+dfsg-1.3~deb12u32.9.14+dfsg-1.3~deb12u3
Debian:13libxml2before 2.12.7+dfsg+really2.9.14-22.12.7+dfsg+really2.9.14-2
openSUSE:Leap 15.6libxml2before 2.10.3-150500.5.29.12.10.3-150500.5.29.1
openSUSE:Leap 15.6libxml2-pythonbefore 2.10.3-150500.5.29.12.10.3-150500.5.29.1
openSUSE:Leap 15.6python-libxml2-pythonbefore 2.9.7-150000.3.82.12.9.7-150000.3.82.1
openSUSE:Tumbleweedlibxml2before 2.13.8-2.12.13.8-2.1
Red Hat:enterprise_linux:10.0libxml2before 0:2.12.5-7.el10_00:2.12.5-7.el10_0
Red Hat:enterprise_linux:10.0libxml2-debuginfobefore 0:2.12.5-7.el10_00:2.12.5-7.el10_0
Red Hat:enterprise_linux:10.0libxml2-debugsourcebefore 0:2.12.5-7.el10_00:2.12.5-7.el10_0
Red Hat:enterprise_linux:10.0libxml2-develbefore 0:2.12.5-7.el10_00:2.12.5-7.el10_0
Red Hat:enterprise_linux:10.0libxml2-staticbefore 0:2.12.5-7.el10_00:2.12.5-7.el10_0
Red Hat:enterprise_linux:10.0python3-libxml2before 0:2.12.5-7.el10_00:2.12.5-7.el10_0

+80

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-10230Samba: command injection in wins server hook script
    52Plan
  • CVE-2026-4631Cockpit: cockpit: unauthenticated remote code execution due to ssh command-line argument injection
    44Plan
  • CVE-2026-76578Ipa: freeipa: freeipa: unauthenticated ldap client can obtain administrator credentials via the self-managed-token aci
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-5278May 27, 2025 · Coreutils: heap buffer under-read in gnu coreutils sort via key specification
    17Monitor
  • ← EarlierCVE-2025-49794Jun 16, 2025 · Libxml: heap use after free (uaf) leads to denial of service (dos)
    36Monitor
  • Later →CVE-2025-4404Jun 17, 2025 · Freeipa: idm: privilege escalation from host to domain admin in freeipa
    37Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
gitlab.gnome.org/GNOME/libxml2/ libxml22.15.0Vendor (CNA)
almalinux:libxml22.12.5-7.el10_0 · AlmaLinux:10Package registry (OSV)
almalinux:libxml2-devel2.12.5-7.el10_0 · AlmaLinux:10Package registry (OSV)
almalinux:libxml2-static2.12.5-7.el10_0 · AlmaLinux:10Package registry (OSV)
almalinux:python3-libxml22.12.5-7.el10_0 · AlmaLinux:10Package registry (OSV)
alpine:libxml22.13.9-r0 · Alpine:v3.21Package registry (OSV)
debian:libxml22.9.14+dfsg-1.3~deb12u3 · Debian:12Package registry (OSV)
opensuse:libxml22.10.3-150500.5.29.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:libxml2-python2.10.3-150500.5.29.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:python-libxml2-python2.9.7-150000.3.82.1 · openSUSE:Leap 15.6Package registry (OSV)
red hat:libxml20:2.12.5-7.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:libxml2-160:2.15.2-0.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:libxml2-debuginfo0:2.12.5-7.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:libxml2-debugsource0:2.12.5-7.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:libxml2-devel0:2.12.5-7.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:libxml2-python0:2.9.1-6.el7_9.10 · Red Hat:rhel_els:7Package registry (OSV)
red hat:libxml2-static0:2.12.5-7.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:python3-libxml20:2.12.5-7.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:python3-libxml2-debuginfo0:2.12.5-7.el10_0 · Red Hat:enterprise_linux:10.0Package registry (OSV)
rocky linux:libxml20:2.12.5-7.el10_0 · Rocky Linux:10Package registry (OSV)
suse:libxml22.12.10-150700.4.3.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:libxml22.9.7-150000.3.82.1 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:libxml2-python2.10.3-150500.5.29.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:libxml2-python2.12.10-150700.4.3.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:python-libxml22.9.4-46.87.1 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:python-libxml2-python2.9.7-150000.3.82.1 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-34003311 days apartXorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory access
    31Monitor
  • CVE-2025-3290663 days apartLibsoup: out of bounds reads in soup_headers_parse_request()
    30Monitor
  • CVE-2025-11021102 days apartLibsoup: out-of-bounds read in cookie date handling of libsoup http library
    30Monitor
  • CVE-2026-85234456 days apartTftp: tftp-hpa: denial of service due to out-of-bounds read/write in remap engine
    30Monitor
  • CVE-2026-115484494 days apartOpen-iscsi: open-iscsi: dhcpv4 option parser heap out-of-bounds read in iscsiuio parse_msg
    30Monitor
  • CVE-2025-3291463 days apartLibsoup: oob read on libsoup through function "soup_multipart_new_from_message" in soup-multipart.c leads to crash or exit of process
    29Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓
  2. SSVC exploitation— → none

For records you follow, these changes also arrive as notifications. →

References

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records