The polling timer handler in ACRN before 2.5 has a use-after-free for a freed virtio…
Priority LOW 35CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.
Summary
The polling timer handler in ACRN before 2.5 has a use-after-free for a freed virtio device, related to devicemodel/hw/pci/virtio/*.c.
Why it matters now
EPSS 0.00961 61st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-36144
- 2026-10-03 Alias added: GHSA-cqgc-44vw-w3h7
References
More Linux Acrn vulnerabilities
- TI-2019-13579 The Device Model in ACRN before 2019w25.5-140000p relies on assert calls in… CVSS 3.1HIGH 7.5
- TI-2021-14568 An issue was discovered in ACRN before 2.5. CVSS 3.1HIGH 7.8
- TI-2021-14567 An issue was discovered in ACRN before 2.5. CVSS 3.1HIGH 7.5
- TI-2021-14566 ACRN before 2.5 has a devicemodel/hw/pci/xhci.c NULL Pointer Dereference for a trb pointer. CVSS 3.1HIGH 7.5
- TI-2021-14565 The Device Model in ACRN through 2.5 has a devicemodel/core/mem.c use-after-free for a freed rb_entry. CVSS 3.1HIGH 7.5
- TI-2021-14563 ACRN before 2.5 has a hw/pci/virtio/virtio.c vq_endchains NULL Pointer Dereference. CVSS 3.1HIGH 7.5
Sources
- CVE-2021-36144 · CVE Program
- CVE-2021-36144 · NVD
- FIRST EPSS
- GHSA-cqgc-44vw-w3h7 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences