Detections
Analytics

Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/csql-kernel-6_6, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-kernel-6_6, sys-kernel/lakitu-nc-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_6, sys-kernel/lakitu-vgpu-kernel-6_6: security update to 19216.655.6

medium Tenable Self-Hosted Container Security Plugin ID 469234

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - In the Linux kernel, the following vulnerability has been resolved: bpf: Reject BPF_MAP_TYPE_INODE_STORAGE
 creation if BPF LSM is uninitialized When CONFIG_BPF_LSM=y is set, BPF inode storage maps
 (BPF_MAP_TYPE_INODE_STORAGE) are compiled into the kernel. However, if the BPF LSM is not explicitly
 enabled at boot time (e.g. omitted from the "lsm=" boot parameter), lsm_prepare() is never executed for
 the BPF LSM. Consequently, the BPF inode security blob offset (bpf_lsm_blob_sizes.lbs_inode) is never
 initialized and remains at its default compiled size of 8 bytes instead of being updated to a valid offset
 past the reserved struct rcu_head (typically 16 bytes or more). When a privileged user creates and updates
 a BPF_MAP_TYPE_INODE_STORAGE map, bpf_inode() evaluates inode->i_security + 8. This erroneously aliases
 the struct rcu_head.func callback pointer at the beginning of the inode->i_security blob. During
 subsequent map element cleanup or inode destruction, writing NULL to owner_storage clears the queued RCU
 callback pointer. When rcu_do_batch() later executes the queued callback, it attempts an instruction fetch
 at address 0x0, triggering an immediate kernel panic. Fix this by introducing a global bpf_lsm_initialized
 boolean flag marked with __ro_after_init. Set this flag to true inside bpf_lsm_init() when the LSM
 framework successfully registers the BPF LSM. Gate map allocation in inode_storage_map_alloc() on this
 flag, returning -EOPNOTSUPP if the BPF LSM is in turn uninitialized. This fail-fast approach prevents
 userspace from allocating inode storage maps when the supporting BPF LSM infrastructure is absent,
 avoiding zombie map states. (CVE-2026-64192)

Solution

Update the sys-kernel/cchost-kernel-6_12 library and its related packages to version 19216.655.6 or later.

See Also

https://storage.googleapis.com/cos-oval-vulnerability-feed/cos-125.oval.xml.tar.gz

Plugin Details

Severity: Medium

ID: 469234

Version: Revision 1.3

Type: Local

Published: 10/3/2026

Updated: 10/3/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.58

Vendor

Vendor Severity: MEDIUM

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

CVSS Score Source: CVE-2026-64192

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 7/20/2026

Reference Information

CVE: CVE-2026-64192