Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: virtio_pci: fix vq info pointer lookup via wrong index Unbinding a virtio… (CVE-2026-64457)
A vulnerability in the Linux kernel's virtio_pci subsystem was fixed that involved incorrect pointer lookup via a wrong index, leading to a NULL pointer dereference when unbinding a virtio balloon device. This could cause a kernel crash. The issue affects various Linux kernel versions prior to 7.0.0-31.31 and related builds. The vulnerability has been addressed in updated kernel packages released by Ubuntu. Users are advised to update and reboot to apply the fix.
AI Analysis
Technical Summary
The Linux kernel contained a vulnerability in the virtio_pci driver where unbinding a virtio balloon device triggered a NULL pointer dereference due to incorrect vq info pointer lookup via a wrong index. This was observed when executing the unbind operation on the virtio balloon device, causing a kernel BUG due to dereferencing a NULL pointer. The issue was resolved in Linux kernel updates provided by Ubuntu. The vulnerability affects multiple Linux kernel versions prior to 7.0.0-31.31 and related variants. The fix requires updating to the patched kernel versions and rebooting the system.
Potential Impact
This vulnerability can cause a kernel NULL pointer dereference leading to a system crash (denial of service) when unbinding a virtio balloon device. There is no indication from the data that this vulnerability allows privilege escalation or arbitrary code execution. The impact is primarily a denial of service via kernel crash.
Mitigation Recommendations
A patch is available and has been released by Ubuntu in updated Linux kernel packages. Users should apply the kernel updates to versions 7.0.0-31.31 or later (including the specified patched builds) and reboot their systems to complete remediation. Due to an ABI change, third-party kernel modules must be recompiled and reinstalled after the update. No additional mitigation steps are required beyond applying the official fix.
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: virtio_pci: fix vq info pointer lookup via wrong index Unbinding a virtio… (CVE-2026-64457)
Description
A vulnerability in the Linux kernel's virtio_pci subsystem was fixed that involved incorrect pointer lookup via a wrong index, leading to a NULL pointer dereference when unbinding a virtio balloon device. This could cause a kernel crash. The issue affects various Linux kernel versions prior to 7.0.0-31.31 and related builds. The vulnerability has been addressed in updated kernel packages released by Ubuntu. Users are advised to update and reboot to apply the fix.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel contained a vulnerability in the virtio_pci driver where unbinding a virtio balloon device triggered a NULL pointer dereference due to incorrect vq info pointer lookup via a wrong index. This was observed when executing the unbind operation on the virtio balloon device, causing a kernel BUG due to dereferencing a NULL pointer. The issue was resolved in Linux kernel updates provided by Ubuntu. The vulnerability affects multiple Linux kernel versions prior to 7.0.0-31.31 and related variants. The fix requires updating to the patched kernel versions and rebooting the system.
Potential Impact
This vulnerability can cause a kernel NULL pointer dereference leading to a system crash (denial of service) when unbinding a virtio balloon device. There is no indication from the data that this vulnerability allows privilege escalation or arbitrary code execution. The impact is primarily a denial of service via kernel crash.
Mitigation Recommendations
A patch is available and has been released by Ubuntu in updated Linux kernel packages. Users should apply the kernel updates to versions 7.0.0-31.31 or later (including the specified patched builds) and reboot their systems to complete remediation. Due to an ABI change, third-party kernel modules must be recompiled and reinstalled after the update. No additional mitigation steps are required beyond applying the official fix.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-gqwv-4rwr-x42g
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-64457"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a6542089c2644c7f8082cd4
Added to database: 07/25/2026, 23:08:56 UTC
Last enriched: 09/07/2026, 17:55:33 UTC
Last updated: 09/08/2026, 10:52:11 UTC
Views: 59
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