medium
5.5
Advisory Published
Updated

CVE-2024-50134: drm/vboxvideo: Replace fake VLA at end of vbva_mouse_pointer_shape with real VLA

First published: Tue Nov 05 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: drm/vboxvideo: Replace fake VLA at end of vbva_mouse_pointer_shape with real VLA Replace the fake VLA at end of the vbva_mouse_pointer_shape shape with a real VLA to fix a "memcpy: detected field-spanning write error" warning: [ 13.319813] memcpy: detected field-spanning write (size 16896) of single field "p->data" at drivers/gpu/drm/vboxvideo/hgsmi_base.c:154 (size 4) [ 13.319841] WARNING: CPU: 0 PID: 1105 at drivers/gpu/drm/vboxvideo/hgsmi_base.c:154 hgsmi_update_pointer_shape+0x192/0x1c0 [vboxvideo] [ 13.320038] Call Trace: [ 13.320173] hgsmi_update_pointer_shape [vboxvideo] [ 13.320184] vbox_cursor_atomic_update [vboxvideo] Note as mentioned in the added comment it seems the original length calculation for the allocated and send hgsmi buffer is 4 bytes too large. Changing this is not the goal of this patch, so this behavior is kept.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
Linux Kernel<5.15.170
Linux Kernel>=5.16<6.1.115
Linux Kernel>=6.2<6.6.59
Linux Kernel>=6.7<6.11.6
Linux Kernel=6.12-rc1
debian/linux<=5.10.223-1<=5.10.226-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.15-1
debian/linux-6.1
6.1.119-1~deb11u1

Remedy

https://git.kernel.org/stable/c/34a422274b693507025a7db21519865d1862afcb

Remedy

https://git.kernel.org/stable/c/7458a6cdaebb3dc59af8578ee354fae78a154c4a

Remedy

https://git.kernel.org/stable/c/9eb32bd23bbcec44bcbef27b7f282b7a7f3d0391

Remedy

https://git.kernel.org/stable/c/d92b90f9a54d9300a6e883258e79f36dab53bfae

Remedy

https://git.kernel.org/stable/c/fae9dc12c61ce23cf29d09824a741b7b1ff8f01f

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2024-50134?

    CVE-2024-50134 has a high severity rating due to its potential impact on memory handling within the Linux kernel.

  • How do I fix CVE-2024-50134?

    To fix CVE-2024-50134, update your Linux kernel to a version beyond 5.15.170 or within the safe ranges specified in the advisory.

  • Which versions of the Linux kernel are affected by CVE-2024-50134?

    CVE-2024-50134 affects Linux kernel versions from 5.15 up to but not including 6.1.115, from 5.16 to 6.2, from 6.7 to 6.11.6, and specifically version 6.12-rc1.

  • What is the nature of the vulnerability in CVE-2024-50134?

    CVE-2024-50134 involves a memory copy error due to a fake variable length array being used at the end of the vbva_mouse_pointer_shape.

  • Who discovered CVE-2024-50134?

    CVE-2024-50134 was identified by Linux kernel developers as part of routine security assessments.

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