What’s Vulnerable › Vulnerabilities

CVE-2026-63865: bpf: Drop task_to_inode and inet_conn_established from lsm sleepable hooks

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-19 · updated 2026-10-26

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.

Affected products

• Linux kernel: from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.141; from 6.7 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10 — fixed in 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10
• Linux kernel: 5.11 — fixed in 7.1

How to fix

Upgrade to a fixed version: Linux kernel 5.15.209, 6.1.175, 6.6.141, 6.12.91; Linux kernel 7.1. Check the vendor advisory for mitigations.

References

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

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