Security readout for executives and security teams
Plain-English summary
CVE-2025-12464 is a QEMU e1000 virtual network device flaw. A user inside a guest VM could trigger a stack buffer overflow in loopback handling and crash the QEMU process on the host. The stated impact is denial of service, not data theft or host takeover.
Executive priority
Treat as a medium-priority availability risk for affected virtualization platforms. It can disrupt workloads by crashing QEMU, but sources do not show active exploitation or confidentiality impact. Prioritize patch tracking and exposure inventory over emergency response unless critical services rely on affected hosts.
Technical view
The flaw is a CWE-121 stack-based buffer overflow in QEMU e1000 receive handling. Short-frame padding moved to net core, but e1000 loopback receive can still process short frames, overrunning e1000_receive_iov(). Red Hat rates it medium, CVSS 6.2, with availability impact only.
Likely exposure
Relevant to virtualization environments using affected qemu-kvm builds and e1000 virtual NICs. The source bundle lists Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 10, and Red Hat OpenShift Container Platform 4 rhcos as affected. RHEL 6, 7, 8 entries are listed as unaffected.
Exploitation context
The attack is local to a guest VM context. Sources describe a malicious guest user causing the host-side QEMU process to crash, resulting in denial of service for that VM or workload. No source in the bundle indicates active exploitation, public exploit availability, or broader compromise.
Researcher notes
Evidence is strongest for the described QEMU e1000 loopback short-frame path and Red Hat product impact. The bundle does not provide a specific fixed version, patch commit, or exploit proof. Validate against vendor advisories before declaring remediation complete.
Mitigation direction
- Check Red Hat advisories and errata for fixed qemu-kvm or rhcos builds.
- Prioritize affected virtualization hosts running RHEL 9, RHEL 10, or OpenShift 4 rhcos.
- Identify VMs configured with the QEMU e1000 virtual network device.
- Apply vendor-provided updates or mitigations when available.
- Consider reducing e1000 usage where operationally feasible and vendor-supported.
Validation and detection
- Inventory qemu-kvm versions and platform releases on virtualization hosts.
- Confirm whether hosts match affected Red Hat product entries.
- Review VM definitions for e1000 virtual NIC usage.
- Monitor host logs for unexpected QEMU process crashes.
- Track Red Hat CVE and Bugzilla entries for remediation status.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-121: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2025-12464 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H2.53.6redhatVulnerability scoring details
Base CVSS 3.1 score
6.2MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineredhat
Made public.
- Source timelineredhat
Reported to Red Hat.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://access.redhat.com/security/cve/CVE-2025-12464CVE reference, redhat · vdb-entry, x_refsource_REDHAT
- RHBZ#2408845CVE reference, redhat · issue-tracking, x_refsource_REDHAT
- https://gitlab.com/qemu-project/qemu/-/issues/3043CVE reference, redhat
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.