Medium 5.5Published May 8, 2026

CVE-2026-43302drm/v3d: Set DMA segment size to avoid debug warnings

Updated under an hour ago (Oct 27, 2026, 1:23 PM ET)

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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

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	57692c94dcbe99a1e0444409a3da13fb3443562c builds before 14d0d6c8b4504a60cfeea74775ab2e0164019e65; from 57692c94dcbe99a1e0444409a3da13fb3443562c before 225023e3619b81af6d8d0e680503fc2d68633023; 57692c94dcbe99a1e0444409a3da13fb3443562c builds before 2663ef70c6123b2232190f917275e5c3175f97d0; from 57692c94dcbe99a1e0444409a3da13fb3443562c before cf510785f74e74c54de40a43a955b7f844857487; from 57692c94dcbe99a1e0444409a3da13fb3443562c before 0290934d30abe7c88e18140fd5184c3f386b1e44; from 57692c94dcbe99a1e0444409a3da13fb3443562c before db15f469a88d3bbeeaa9f8c9f5e74d856ba5d7d2; 57692c94dcbe99a1e0444409a3da13fb3443562c builds before 9eb018828b1b30dfba689c060735c50fc5b9f704	CNA record
linux linux_kernel linux:linux_kernel	from 4.18 before 5.15.202; from 5.16 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.16; from 6.19 before 6.19.6	NVD

References

References

https://git.kernel.org/stable/c/14d0d6c8b4504a60cfeea74775ab2e0164019e65	patch
https://git.kernel.org/stable/c/225023e3619b81af6d8d0e680503fc2d68633023	patch
https://git.kernel.org/stable/c/2663ef70c6123b2232190f917275e5c3175f97d0	patch
https://git.kernel.org/stable/c/cf510785f74e74c54de40a43a955b7f844857487	patch
https://git.kernel.org/stable/c/0290934d30abe7c88e18140fd5184c3f386b1e44	patch
https://git.kernel.org/stable/c/db15f469a88d3bbeeaa9f8c9f5e74d856ba5d7d2	patch
https://git.kernel.org/stable/c/9eb018828b1b30dfba689c060735c50fc5b9f704	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.