Read the docs
TI-2022-09730 Aliases CVE-2022-26356GHSA-wqf3-h5g7-w9q8

Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation…

Priority LOW 25CWE-667Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
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-667 and the CVSS impact.

Summary

Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak.

Why it matters now

EPSS 0.00241 15th 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

VendorProductAffected versionsFixed inStatusSource
Xenxen——No fix listedCNA
  • xen VendorXen Affected — Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*4.0.0 to before 4.12.0; 4.13.0 to before 4.14.0; 4.15.0 to before 4.16.0VulnerableXen
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*34VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*35VulnerableFedoraproject
  • cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* Versions 4.0.0 to before 4.12.0; 4.13.0 to before 4.14.0; 4.15.0 to before 4.16.0 Vulnerable ·Xen
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
  • cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    xen — FEDORA-2022-64b2c02d29

    6 records Highest priority Priority LOW 6 LOW

    Other records, highest priority first

    • TI-2022-09735 IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record…Priority LOW 34
    • TI-2022-09734 IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record…Priority LOW 34
    • TI-2022-09733 IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record…Priority LOW 34
    Show all 6 records → Advisory →
  • Advisory ·

    xen — FEDORA-2022-dfbf7e2372

    6 records Highest priority Priority LOW 6 LOW

    Other records, highest priority first

    • TI-2022-09735 IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record…Priority LOW 34
    • TI-2022-09734 IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record…Priority LOW 34
    • TI-2022-09733 IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record…Priority LOW 34
    Show all 6 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-26356
  2. 2026-10-03 Alias added: GHSA-wqf3-h5g7-w9q8

References

Patch 2

Advisory 5

  • TI-2012-00210 The x86-64 kernel system-call functionality in Xen 4.1.2 and earlier, as used in Citrix… CVSS 2.0HIGH 7.2
  • TI-2023-07042 Information disclosure through error messages in AMD Ryzen™ 3000 Series Desktop… CVSS 3.1MEDIUM 5.5
  • TI-2015-04333 The C+ mode offload emulation in the RTL8139 network card device model in QEMU, as used… CVSS 2.0HIGH 9.3
  • TI-2015-06741 The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows… CVSS 3.1CRITICAL 10.0
  • TI-2018-06436 A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures… CVSS 3.0HIGH 7.8
  • TI-2024-20522 x86: Incorrect logic for BTC/SRSO mitigations CVSS 3.1HIGH 7.5
See all 489 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences