CVE-2026-43302 (GCVE-0-2026-43302)

Vulnerability from cvelistv5 – Published: 2026-05-08 13:11 – Updated: 2026-05-11 22:21
VLAI
Title
drm/v3d: Set DMA segment size to avoid debug warnings
Summary
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
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 57692c94dcbe99a1e0444409a3da13fb3443562c , < 14d0d6c8b4504a60cfeea74775ab2e0164019e65 (git)
Affected: 57692c94dcbe99a1e0444409a3da13fb3443562c , < 225023e3619b81af6d8d0e680503fc2d68633023 (git)
Affected: 57692c94dcbe99a1e0444409a3da13fb3443562c , < 2663ef70c6123b2232190f917275e5c3175f97d0 (git)
Affected: 57692c94dcbe99a1e0444409a3da13fb3443562c , < cf510785f74e74c54de40a43a955b7f844857487 (git)
Affected: 57692c94dcbe99a1e0444409a3da13fb3443562c , < 0290934d30abe7c88e18140fd5184c3f386b1e44 (git)
Affected: 57692c94dcbe99a1e0444409a3da13fb3443562c , < db15f469a88d3bbeeaa9f8c9f5e74d856ba5d7d2 (git)
Affected: 57692c94dcbe99a1e0444409a3da13fb3443562c , < 9eb018828b1b30dfba689c060735c50fc5b9f704 (git)
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Linux Linux Affected: 4.18
Unaffected: 0 , < 4.18 (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "dateReserved": "2026-05-01T14:12:56.000Z",
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The kernel defaults to 64K. setting\\n\u0027max_seg_size\u0027 to the maximum will prevent \u0027debug_dma_map_sg()\u0027\\nfrom complaining about the over-mapping of the V3D segment length.\\n\\nDMA-API: v3d 1002000000.v3d: mapping sg segment longer than device\\n claims to support [len=8290304] [max=65536]\\nWARNING: CPU: 0 PID: 493 at kernel/dma/debug.c:1179 debug_dma_map_sg+0x330/0x388\\nCPU: 0 UID: 0 PID: 493 Comm: Xorg Not tainted 6.12.53-yocto-standard #1\\nHardware name: Raspberry Pi 5 Model B Rev 1.0 (DT)\\npstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\\npc : debug_dma_map_sg+0x330/0x388\\nlr : debug_dma_map_sg+0x330/0x388\\nsp : ffff8000829a3ac0\\nx29: ffff8000829a3ac0 x28: 0000000000000001 x27: ffff8000813fe000\\nx26: ffffc1ffc0000000 x25: ffff00010fdeb760 x24: 0000000000000000\\nx23: ffff8000816a9bf0 x22: 0000000000000001 x21: 0000000000000002\\nx20: 0000000000000002 x19: ffff00010185e810 x18: ffffffffffffffff\\nx17: 69766564206e6168 x16: 74207265676e6f6c x15: 20746e656d676573\\nx14: 20677320676e6970 x13: 5d34303334393134 x12: 0000000000000000\\nx11: 00000000000000c0 x10: 00000000000009c0 x9 : ffff8000800e0b7c\\nx8 : ffff00010a315ca0 x7 : ffff8000816a5110 x6 : 0000000000000001\\nx5 : 000000000000002b x4 : 0000000000000002 x3 : 0000000000000008\\nx2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff00010a315280\\nCall trace:\\n debug_dma_map_sg+0x330/0x388\\n __dma_map_sg_attrs+0xc0/0x278\\n dma_map_sgtable+0x30/0x58\\n drm_gem_shmem_get_pages_sgt+0xb4/0x140\\n v3d_bo_create_finish+0x28/0x130 [v3d]\\n v3d_create_bo_ioctl+0x54/0x180 [v3d]\\n drm_ioctl_kernel+0xc8/0x140\\n 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\":\"https://git.kernel.org/stable/c/225023e3619b81af6d8d0e680503fc2d68633023\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2663ef70c6123b2232190f917275e5c3175f97d0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9eb018828b1b30dfba689c060735c50fc5b9f704\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cf510785f74e74c54de40a43a955b7f844857487\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/db15f469a88d3bbeeaa9f8c9f5e74d856ba5d7d2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T11:36:25+00:00",
      "cve": "CVE-2026-43302",
      "id": "CVE-2026-43302",
      "initial_release_date": "2026-05-08T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/v3d: Set DMA segment size to avoid debug warnings",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43302.json",
      "version": "3"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.