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NVD / CVE Program· CNA redhat

CVE-2025-12748: Libvirt: denial of service in xml parsing

Noroxi assessment

Priority: Monitor (action score 22/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.22% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: azl3 libvirt 10.0.0-6 on Azure Linux 3.0 10.0.0-7; azl3 libvirt 10.0.0-7 on Azure Linux 3.0 10.0.0-7; cbl2 libvirt 7.10.0-10 on CBL Mariner 2.0 7.10.0-11.

Low priority for now. Upgrade to azl3 libvirt 10.0.0-6 on Azure Linux 3.0 10.0.0-7; azl3 libvirt 10.0.0-7 on Azure Linux 3.0 10.0.0-7; cbl2 libvirt 7.10.0-10 on CBL Mariner 2.0 7.10.0-11 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 flaw was discovered in libvirt in the XML file processing. More specifically, the parsing of user provided XML files was performed before the ACL checks. A malicious user with limited permissions could exploit this flaw by submitting a specially crafted XML file, causing libvirt to allocate too much memory on the host. The excessive memory consumption could lead to a libvirt process crash on the host, resulting in a denial-of-service condition.

MediumCVSS 5.5 · v3.1—Proof of concept Fix available
Published
Nov 11, 2025
Updated
Nov 5, 2026
EPSS
0.2% · 13th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
5.5
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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-12748

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.com/libvirt/libvirt libvirt

    • up to and including 11.9.0affected · semver

  • Red Hat Red Hat Enterprise Linux 10

    • 0:11.10.0-12.el10_2 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 8

    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 9

    • 0:11.10.0-12.el9_8 and laternot affected · rpm

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:10libvirtbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-clientbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-client-qemubefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemonbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-commonbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-config-networkbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-config-nwfilterbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-driver-interfacebefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-driver-networkbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-driver-nodedevbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-driver-nwfilterbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-driver-qemubefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-driver-secretbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-driver-storagebefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-driver-storage-corebefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-driver-storage-diskbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-driver-storage-iscsibefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-driver-storage-logicalbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-driver-storage-mpathbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-driver-storage-rbdbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-driver-storage-scsibefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-kvmbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-lockbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1
AlmaLinux:10libvirt-daemon-logbefore 11.10.0-12.el10_2.alma.111.10.0-12.el10_2.alma.1

+96

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-2025-9640Oct 15, 2025 · Samba: vfs_streams_xattr uninitialized memory write possible
    17Monitor
  • ← EarlierCVE-2025-12464Oct 31, 2025 · Qemu-kvm: stack buffer overflow in e1000 device via short frames in loopback mode
    24Monitor
  • Later →CVE-2025-13193Nov 17, 2025 · Libvirt: information disclosure via world-readable vm snapshots
    22Monitor

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
azl3 libvirt 10.0.0-6 on Azure Linux 3.010.0.0-7 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 libvirt 10.0.0-7 on Azure Linux 3.010.0.0-7 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 libvirt 7.10.0-10 on CBL Mariner 2.07.10.0-11 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 libvirt 7.10.0-11 on CBL Mariner 2.07.10.0-11 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:libvirt11.10.0-12.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libvirt-client11.10.0-12.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libvirt-client-qemu11.10.0-12.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libvirt-daemon11.10.0-12.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libvirt-daemon-common11.10.0-12.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libvirt-daemon-config-network11.10.0-12.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libvirt-daemon-config-nwfilter11.10.0-12.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libvirt-daemon-driver-interface11.10.0-12.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libvirt-daemon-driver-network11.10.0-12.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libvirt-daemon-driver-nodedev11.10.0-12.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libvirt-daemon-driver-nwfilter11.10.0-12.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
almalinux:libvirt-daemon-driver-qemu11.10.0-12.el10_2.alma.1 · AlmaLinux:10Package registry (OSV)
alpine:libvirt11.10.0-r0 · Alpine:v3.23Package registry (OSV)
debian:libvirt11.3.0-3+deb13u2 · Debian:13Package registry (OSV)
opensuse:libvirt10.0.0-150600.8.12.1 · openSUSE:Leap 15.6Package registry (OSV)
red hat:libvirt0:11.10.0-12.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libvirt-client0:11.10.0-12.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libvirt-client-debuginfo0:11.10.0-12.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libvirt-client-qemu0:11.10.0-12.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libvirt-daemon0:11.10.0-12.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libvirt-daemon-common0:11.10.0-12.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libvirt-daemon-common-debuginfo0:11.10.0-12.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libvirt-daemon-config-network0:11.10.0-12.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libvirt-daemon-config-nwfilter0:11.10.0-12.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libvirt-daemon-debuginfo0:11.10.0-12.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libvirt-daemon-driver-interface0:11.10.0-12.el10_2 · Red Hat:enterprise_linux:10.2Package registry (OSV)

+3

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02025-11-06

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.

  1. First PoC-6 d
  2. Published
  3. TodayNov 10, 2026+364 d

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.

Variant candidates

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

  • CVE-2025-32049222 days apartLibsoup: denial of service attack to websocket server
    30Monitor
  • CVE-2026-15711245 days apartLibsoup: soupwebsocketconnection: libsoup: websocket remote denial of service via oversized control frame protocol violation
    30Monitor
  • CVE-2026-18649268 days apartGstreamer1-plugins-good: gst-plugins-good: unbounded memory growth in rtph264depay and rtph265depay rtp depayloaders
    30Monitor
  • CVE-2026-91149311 days apartCockpit: cockpit: denial of service via unbounded connection thread spawning
    30Monitor
  • CVE-2026-112322363 days apartKrb5: mit krb5 kadmind unauthenticated cpu dos via auth_gssapi client states cleanup
    30Monitor
  • CVE-2026-85231339 days apartLibtirpc: libtirpc: denial of service via unbounded memory allocation during rpcsec_gss decoding
    26Monitor

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

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

CWE-770 · Allocation of Resources Without Limits or Throttling

CVSS vector

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

Change log

  1. Fix✗ → ✓

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

References

Show all references (3 more)

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

All records