From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-cve-announce@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@kernel.org>
Subject: CVE-2026-43302: drm/v3d: Set DMA segment size to avoid debug warnings
Date: Fri, 8 May 2026 15:12:07 +0200 [thread overview]
Message-ID: <2026050856-CVE-2026-43302-a1f7@gregkh> (raw)
From: Greg Kroah-Hartman <gregkh@kernel.org>
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
The Linux kernel CVE team has assigned CVE-2026-43302 to this issue.
Affected and fixed versions
===========================
Fixed in 5.15.202 with commit 14d0d6c8b4504a60cfeea74775ab2e0164019e65
Fixed in 6.1.165 with commit 225023e3619b81af6d8d0e680503fc2d68633023
Fixed in 6.6.128 with commit 2663ef70c6123b2232190f917275e5c3175f97d0
Fixed in 6.12.75 with commit cf510785f74e74c54de40a43a955b7f844857487
Fixed in 6.18.16 with commit 0290934d30abe7c88e18140fd5184c3f386b1e44
Fixed in 6.19.6 with commit db15f469a88d3bbeeaa9f8c9f5e74d856ba5d7d2
Fixed in 7.0 with commit 9eb018828b1b30dfba689c060735c50fc5b9f704
Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.
Unaffected versions might change over time as fixes are backported to
older supported kernel versions. The official CVE entry at
https://cve.org/CVERecord/?id=CVE-2026-43302
will be updated if fixes are backported, please check that for the most
up to date information about this issue.
Affected files
==============
The file(s) affected by this issue are:
drivers/gpu/drm/v3d/v3d_drv.c
Mitigation
==========
The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes. Individual
changes are never tested alone, but rather are part of a larger kernel
release. Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all. If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
https://git.kernel.org/stable/c/14d0d6c8b4504a60cfeea74775ab2e0164019e65
https://git.kernel.org/stable/c/225023e3619b81af6d8d0e680503fc2d68633023
https://git.kernel.org/stable/c/2663ef70c6123b2232190f917275e5c3175f97d0
https://git.kernel.org/stable/c/cf510785f74e74c54de40a43a955b7f844857487
https://git.kernel.org/stable/c/0290934d30abe7c88e18140fd5184c3f386b1e44
https://git.kernel.org/stable/c/db15f469a88d3bbeeaa9f8c9f5e74d856ba5d7d2
https://git.kernel.org/stable/c/9eb018828b1b30dfba689c060735c50fc5b9f704
reply other threads:[~2026-05-08 13:14 UTC|newest]
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