CVE-2026-43302

drm/v3d: Set DMA segment size to avoid debug warnings

State: Published
Severity: Not scored
Published: May 8, 2026
Updated: May 11, 2026
Reserved: May 1, 2026

Description

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

drm/v3d: Set DMA segment size to avoid debug warnings

When using V3D rendering with CONFIG_DMA_API_DEBUG enabled, the kernel occasionally reports a segment size mismatch. This is because 'max_seg_size' is not set. The kernel defaults to 64K. setting 'max_seg_size' to the maximum will prevent 'debug_dma_map_sg()' from complaining about the over-mapping of the V3D segment length.

DMA-API: v3d 1002000000.v3d: mapping sg segment longer than device claims to support [len=8290304] [max=65536] WARNING: CPU: 0 PID: 493 at kernel/dma/debug.c:1179 debug_dma_map_sg+0x330/0x388 CPU: 0 UID: 0 PID: 493 Comm: Xorg Not tainted 6.12.53-yocto-standard #1 Hardware name: Raspberry Pi 5 Model B Rev 1.0 (DT) pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : debug_dma_map_sg+0x330/0x388 lr : debug_dma_map_sg+0x330/0x388 sp : ffff8000829a3ac0 x29: ffff8000829a3ac0 x28: 0000000000000001 x27: ffff8000813fe000 x26: ffffc1ffc0000000 x25: ffff00010fdeb760 x24: 0000000000000000 x23: ffff8000816a9bf0 x22: 0000000000000001 x21: 0000000000000002 x20: 0000000000000002 x19: ffff00010185e810 x18: ffffffffffffffff x17: 69766564206e6168 x16: 74207265676e6f6c x15: 20746e656d676573 x14: 20677320676e6970 x13: 5d34303334393134 x12: 0000000000000000 x11: 00000000000000c0 x10: 00000000000009c0 x9 : ffff8000800e0b7c x8 : ffff00010a315ca0 x7 : ffff8000816a5110 x6 : 0000000000000001 x5 : 000000000000002b x4 : 0000000000000002 x3 : 0000000000000008 x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff00010a315280 Call trace: debug_dma_map_sg+0x330/0x388 __dma_map_sg_attrs+0xc0/0x278 dma_map_sgtable+0x30/0x58 drm_gem_shmem_get_pages_sgt+0xb4/0x140 v3d_bo_create_finish+0x28/0x130 [v3d] v3d_create_bo_ioctl+0x54/0x180 [v3d] drm_ioctl_kernel+0xc8/0x140 drm_ioctl+0x2d4/0x4d8

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	57692c94dcbe99a1e0444409a3da13fb3443562c to before 14d0d6c8b4504a60cfeea74775ab2e0164019e65Affected 57692c94dcbe99a1e0444409a3da13fb3443562c to before 225023e3619b81af6d8d0e680503fc2d68633023Affected 57692c94dcbe99a1e0444409a3da13fb3443562c to before 2663ef70c6123b2232190f917275e5c3175f97d0Affected 57692c94dcbe99a1e0444409a3da13fb3443562c to before cf510785f74e74c54de40a43a955b7f844857487Affected 57692c94dcbe99a1e0444409a3da13fb3443562c to before 0290934d30abe7c88e18140fd5184c3f386b1e44Affected 57692c94dcbe99a1e0444409a3da13fb3443562c to before db15f469a88d3bbeeaa9f8c9f5e74d856ba5d7d2Affected 57692c94dcbe99a1e0444409a3da13fb3443562c to before 9eb018828b1b30dfba689c060735c50fc5b9f704Affected
LinuxLinux	4.18Affected before 4.18Not affected 5.15.202 through 5.15.Not affected 6.1.165 through 6.1.Not affected 6.6.128 through 6.6.Not affected 6.12.75 through 6.12.Not affected 6.18.16 through 6.18.Not affected 6.19.6 through 6.19.Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

57692c94dcbe99a1e0444409a3da13fb3443562c to before 14d0d6c8b4504a60cfeea74775ab2e0164019e65Affected
57692c94dcbe99a1e0444409a3da13fb3443562c to before 225023e3619b81af6d8d0e680503fc2d68633023Affected
57692c94dcbe99a1e0444409a3da13fb3443562c to before 2663ef70c6123b2232190f917275e5c3175f97d0Affected
57692c94dcbe99a1e0444409a3da13fb3443562c to before cf510785f74e74c54de40a43a955b7f844857487Affected
57692c94dcbe99a1e0444409a3da13fb3443562c to before 0290934d30abe7c88e18140fd5184c3f386b1e44Affected
57692c94dcbe99a1e0444409a3da13fb3443562c to before db15f469a88d3bbeeaa9f8c9f5e74d856ba5d7d2Affected
57692c94dcbe99a1e0444409a3da13fb3443562c to before 9eb018828b1b30dfba689c060735c50fc5b9f704Affected

LinuxLinux

4.18Affected
before 4.18Not affected
5.15.202 through 5.15.*Not affected
6.1.165 through 6.1.*Not affected
6.6.128 through 6.6.*Not affected
6.12.75 through 6.12.*Not affected
6.18.16 through 6.18.*Not affected
6.19.6 through 6.19.*Not affected
7.0 and laterNot affected

References

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