Description

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.

Classification

CVE ID: CVE-2024-50134

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 5.06% (scored less or equal to compared to others)

EPSS Date: 2025-02-03 (when was this score calculated)

References

https://git.kernel.org/stable/c/02c86c5d5ef4bbba17d38859c74872825f536617
https://git.kernel.org/stable/c/75f828e944dacaac8870418461d3d48a1ecf2331
https://git.kernel.org/stable/c/34a422274b693507025a7db21519865d1862afcb
https://git.kernel.org/stable/c/7458a6cdaebb3dc59af8578ee354fae78a154c4a
https://git.kernel.org/stable/c/9eb32bd23bbcec44bcbef27b7f282b7a7f3d0391
https://git.kernel.org/stable/c/fae9dc12c61ce23cf29d09824a741b7b1ff8f01f
https://git.kernel.org/stable/c/d92b90f9a54d9300a6e883258e79f36dab53bfae

Timeline