Out-of-bounds Read Affecting kernel-uki-virt-addons package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.17% (6th percentile)

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  • Snyk IDSNYK-RHEL10-KERNELUKIVIRTADDONS-20350965
  • published1 Oct 2026
  • disclosed25 Sept 2026

Introduced: 25 Sep 2026

NewCVE-2026-97995  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 kernel-uki-virt-addons.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uki-virt-addons package and not the kernel-uki-virt-addons package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

virtio_console: do not free control-out buffers on remove

__send_control_msg() publishes &portdev->cpkt as the control-out virtqueue cookie. remove_vqs() walks every virtqueue and passes leftover cookies to free_buf(), which treats them as struct port_buffer and reads sgpages.

If a control message is still on c_ovq when the device is unbound, free_buf() reads past the ports_device object.

KASAN reported slab-out-of-bounds in free_buf():

free_buf
remove_vqs
virtcons_remove
unbind_store

The object was the ports_device allocated in virtcons_probe().

Drain c_ovq without freeing. The packet lives in portdev and is released with it.

CVSS Base Scores

version 3.1