Google: sys-kernel/csql-kernel-6_1, sys-kernel/lakitu-kernel-6_1: security update to 18244.448.43

high Tenable Self-Hosted Container Security Plugin ID 450919

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: smb: client: fix use-after-free in
cifs_oplock_break A race condition can occur in cifs_oplock_break() leading to a use-after-free of the
cinode structure when unmounting: cifs_oplock_break() _cifsFileInfo_put(cfile) cifsFileInfo_put_final()
cifs_sb_deactive() [last ref, start releasing sb] kill_sb() kill_anon_super() generic_shutdown_super()
evict_inodes() dispose_list() evict() destroy_inode() call_rcu(&inode->i_rcu, i_callback)
spin_lock(&cinode->open_file_lock) <- OK [later] i_callback() cifs_free_inode() kmem_cache_free(cinode)
spin_unlock(&cinode->open_file_lock) <- UAF cifs_done_oplock_break(cinode) <- UAF The issue occurs when
umount has already released its reference to the superblock. When _cifsFileInfo_put() calls
cifs_sb_deactive(), this releases the last reference, triggering the immediate cleanup of all inodes under
RCU. However, cifs_oplock_break() continues to access the cinode after this point, resulting in use-after-
free. Fix this by holding an extra reference to the superblock during the entire oplock break operation.
This ensures that the superblock and its inodes remain valid until the oplock break completes.
(CVE-2025-38527)

Solution

Update the sys-kernel/csql-kernel-6_1 library and its related packages to version 18244.448.43 or later.

Plugin Details

Severity: High

ID: 450919

Version: Revision 1.3

Type: Local

Family: Google COS Security Checks

Published: 10/1/2026

Updated: 10/2/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.16

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2025-38527

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Reference Information

CVE: CVE-2025-38527

Detections

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