Google: sys-kernel/csql-kernel-6_1, sys-kernel/csql-kernel-6_6, sys-kernel/lakitu-kernel-6_1, sys-kernel/lakitu-kernel-6_6, sys-kernel/lakitu-nc-kernel-6_6, sys-kernel/lakitu-vgpu-kernel-6_6, sys-kernel/tpusev-kernel-6_6: security update to 18613.731.2

medium Tenable Cloud Security Plugin ID 466392

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: net/sched: cls_bpf: prevent unbounded
recursion in offload rollback Quan Sun reported [1] a stack overflow in cls_bpf_offload_cmd(). Reproducer
on netdevsim: add a skip_sw cls_bpf filter, set the bpf_tc_accept debugfs knob to 0, then `tc filter
replace`. The replace calls tc_setup_cb_replace() which fails. cls_bpf_offload_cmd() then swaps
prog/oldprog and recursively calls itself to roll back. But bpf_tc_accept=0 makes the rollback fail too,
which triggers yet another rollback frame with the same arguments, and so on until the stack is exhausted.
bpf_tc_accept is just a convenient knob for the reproducer. Any driver whose tc_setup_cb_replace() fails
twice in a row can hit the same loop, so this is not a netdevsim-only issue. Two ways to fix it: 1) Have
the rollback call tc_setup_cb_add() on oldprog instead of re-entering cls_bpf_offload_cmd(). 2) Mark the
rollback frame with a flag and skip a second-level rollback from inside it. Go with (2). It is the smaller
change and keeps the original behaviour: the rollback still goes through tc_setup_cb_replace(), so the
driver gets one real chance to restore its state. If that attempt also fails, we just return the original
error instead of recursing. [1]:
https://lore.kernel.org/bpf/[email protected]/T/#u (CVE-2026-74382)

Solution

Update the sys-kernel/csql-kernel-6_1 library and its related packages to version 18613.731.2 or later.

Plugin Details

Severity: Medium

ID: 466392

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.61

Vendor

Vendor Severity: LOW

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-2026-74382

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: 8/11/2026

Reference Information

CVE: CVE-2026-74382

Detections

Analytics