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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-97995

virtio_console: do not free control-out buffers on remove

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b to < b1f39c2a676698cc64c8e105e08b25111a112ec6affected
  • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b to < e03522a990cd2e0f1a736eaa349a9df9ab8541c3affected
  • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b to < 8f6cfc3eca79b8e108d0823756101e2f4f9d811faffected
  • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b to < 2e40c69b9c3448b9c6609cd02013da593b2e123baffected
  • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b to < 177ee901aa2bab02e7f1f8edbb814fd5e386ed62affected
  • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b to < a80c33488e0bbe642ed803b13a4ac8078a70b507affected
  • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b to < f620c40ea6862feed84deb105568b21ec53a7830affected
  • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b to < 894f98e73983f37354214a89a3a7fd35bf9e3072affected
  • f92b16b815efe8207090a9b5a767618fd89542caaffected
  • d2bbfac82b7942afc5d8e564d7087835280df495affected
  • a88e13d9a092fbb772d380944b44eb549ef131feaffected
  • dd807a784fd36f4136516d5858efb6473dda422caffected
  • 47cb14192bcbba3f15b1c3561e05e084e56fdef6affected
  • 6b1c41a0f7183702abb7a104c6c7e196ad69a6b3affected
  • 9037306163a6ba5587e4b5ca511ac7be4fb7295baffected
  • 3.16.60 to < 3.17affected
  • 3.18.108 to < 3.19affected
  • 4.1.52 to < 4.2affected
  • 4.4.131 to < 4.5affected
  • 4.9.98 to < 4.10affected
  • 4.14.39 to < 4.15affected
  • 4.16.7 to < 4.17affected

Linux Linux

Default version status: affected

  • 4.17affected
  • 0 to < 4.17unaffected
  • 5.10.271 to ≤ 5.10.*unaffected
  • 5.15.222 to ≤ 5.15.*unaffected
  • 6.1.189 to ≤ 6.1.*unaffected
  • 6.6.158 to ≤ 6.6.*unaffected
  • 6.12.111 to ≤ 6.12.*unaffected
  • 6.18.53 to ≤ 6.18.*unaffected
  • 7.2.7 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References