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 18613.613.40

high Tenable Cloud Security Plugin ID 466080

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 negative CO-RE accessor
indices in bpf_core_parse_spec() CO-RE accessor strings are colon-separated indices that describe a path
from a root BTF type to a target field, e.g. "0:1:2" walks through nested struct members.
bpf_core_parse_spec() parses each component with sscanf("%d"), so negative values like -1 are silently
accepted. The subsequent bounds checks (access_idx >= btf_vlen(t)) only guard the upper bound and always
pass for negative values because C integer promotion converts the __u16 btf_vlen result to int, making the
comparison (int)(-1) >= (int)(N) false for any positive N. When -1 reaches btf_member_bit_offset() it gets
cast to u32 0xffffffff, producing an out-of-bounds read far past the members array. A crafted BPF program
with a negative CO-RE accessor on any struct that exists in vmlinux BTF (e.g. task_struct) crashes the
kernel deterministically during BPF_PROG_LOAD on any system with CONFIG_DEBUG_INFO_BTF=y (default on major
distributions). The bug is reachable with CAP_BPF: BUG: unable to handle page fault for address:
ffffed11818b6626 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page
Oops: Oops: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 85 Comm: poc Not tainted 7.0.0-rc6 #18
PREEMPT(full) RIP: 0010:bpf_core_parse_spec (tools/lib/bpf/relo_core.c:354) RAX: 00000000ffffffff Call
Trace: <TASK> bpf_core_calc_relo_insn (tools/lib/bpf/relo_core.c:1321) bpf_core_apply
(kernel/bpf/btf.c:9507) check_core_relo (kernel/bpf/verifier.c:19475) bpf_check
(kernel/bpf/verifier.c:26031) bpf_prog_load (kernel/bpf/syscall.c:3089) __sys_bpf
(kernel/bpf/syscall.c:6228) </TASK> CO-RE accessor indices are inherently non-negative (struct member
index, array element index, or enumerator index), so reject them immediately after parsing.
(CVE-2026-45839)

Solution

Update the sys-kernel/csql-kernel-6_1 library and its related packages to version 18613.613.40 or later.

Plugin Details

Severity: High

ID: 466080

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.14

Vendor

Vendor Severity: HIGH

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-2026-45839

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

Vulnerability Publication Date: 5/27/2026

Reference Information

CVE: CVE-2026-45839

Detections

Analytics