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Google: sys-kernel/csql-kernel-6_1, sys-kernel/csql-kernel-6_6: security update to 18613.534.95

high Tenable Self-Hosted Container Security Plugin ID 472294

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: ACPI: EC: clean up handlers on probe
 failure in acpi_ec_setup() When ec_install_handlers() returns -EPROBE_DEFER on reduced-hardware platforms,
 it has already started the EC and installed the address space handler with the struct acpi_ec pointer as
 handler context. However, acpi_ec_setup() propagates the error without any cleanup. The caller
 acpi_ec_add() then frees the struct acpi_ec for non-boot instances, leaving a dangling handler context in
 ACPICA. Any subsequent AML evaluation that accesses an EC OpRegion field dispatches into
 acpi_ec_space_handler() with the freed pointer, causing a use-after-free: BUG: KASAN: slab-use-after-free
 in mutex_lock (kernel/locking/mutex.c:289) Write of size 8 at addr ffff88800721de38 by task init/1 Call
 Trace: <TASK> mutex_lock (kernel/locking/mutex.c:289) acpi_ec_space_handler (drivers/acpi/ec.c:1362)
 acpi_ev_address_space_dispatch (drivers/acpi/acpica/evregion.c:293) acpi_ex_access_region
 (drivers/acpi/acpica/exfldio.c:246) acpi_ex_field_datum_io (drivers/acpi/acpica/exfldio.c:509)
 acpi_ex_extract_from_field (drivers/acpi/acpica/exfldio.c:700) acpi_ex_read_data_from_field
 (drivers/acpi/acpica/exfield.c:327) acpi_ex_resolve_node_to_value (drivers/acpi/acpica/exresolv.c:392)
 </TASK> Allocated by task 1: acpi_ec_alloc (drivers/acpi/ec.c:1424) acpi_ec_add (drivers/acpi/ec.c:1692)
 Freed by task 1: kfree (mm/slub.c:6876) acpi_ec_add (drivers/acpi/ec.c:1751) The bug triggers on reduced-
 hardware EC platforms (ec->gpe < 0) when the GPIO IRQ provider defers probing. Once the stale handler
 exists, any unprivileged sysfs read that causes AML to touch an EC OpRegion (battery, thermal, backlight)
 exercises the dangling pointer. Fix this by calling ec_remove_handlers() in the error path of
 acpi_ec_setup() before clearing first_ec. ec_remove_handlers() checks each EC_FLAGS_* bit before acting,
 so it is safe to call regardless of how far ec_install_handlers() progressed: -ENODEV (handler not
 installed): only calls acpi_ec_stop() -EPROBE_DEFER (handler installed): removes handler, stops EC
 (CVE-2026-31426)

Solution

Update the sys-kernel/csql-kernel-6_1 library and its related packages to version 18613.534.95 or later.

See Also

https://storage.googleapis.com/cos-oval-vulnerability-feed/cos-117.oval.xml.tar.gz

Plugin Details

Severity: High

ID: 472294

Version: Revision 1.1

Type: Local

Published: 10/3/2026

Updated: 10/3/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.03

Vendor

Vendor Severity: LOW

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 4.4

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

CVSS Score Source: CVE-2026-31426

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.1

Vector: CVSS:3.0/AV:L/AC:H/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: 4/13/2026

Reference Information

CVE: CVE-2026-31426