Google: sys-kernel/csql-kernel-6_1, sys-kernel/csql-kernel-6_6: security update to 18613.263.4

medium Tenable Cloud Security Plugin ID 471685

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: efi: Don't map the entire mokvar table
to determine its size Currently, when validating the mokvar table, we (re)map the entire table on each
iteration of the loop, adding space as we discover new entries. If the table grows over a certain size,
this fails due to limitations of early_memmap(), and we get a failure and traceback: ------------[ cut
here ]------------ WARNING: CPU: 0 PID: 0 at mm/early_ioremap.c:139 __early_ioremap+0xef/0x220 ... Call
Trace: <TASK> ? __early_ioremap+0xef/0x220 ? __warn.cold+0x93/0xfa ? __early_ioremap+0xef/0x220 ?
report_bug+0xff/0x140 ? early_fixup_exception+0x5d/0xb0 ? early_idt_handler_common+0x2f/0x3a ?
__early_ioremap+0xef/0x220 ? efi_mokvar_table_init+0xce/0x1d0 ? setup_arch+0x864/0xc10 ?
start_kernel+0x6b/0xa10 ? x86_64_start_reservations+0x24/0x30 ? x86_64_start_kernel+0xed/0xf0 ?
common_startup_64+0x13e/0x141 </TASK> ---[ end trace 0000000000000000 ]--- mokvar: Failed to map EFI
MOKvar config table pa=0x7c4c3000, size=265187. Mapping the entire structure isn't actually necessary, as
we don't ever need more than one entry header mapped at once. Changes efi_mokvar_table_init() to only map
each entry header, not the entire table, when determining the table size. Since we're not mapping any data
past the variable name, it also changes the code to enforce that each variable name is NUL terminated,
rather than attempting to verify it in place. (CVE-2025-21872)

Solution

Update the sys-kernel/csql-kernel-6_1 library and its related packages to version 18613.263.4 or later.

Plugin Details

Severity: Medium

ID: 471685

Version: Revision 1.1

Type: Local

Family: Google COS Security Checks

Published: 10/3/2026

Updated: 10/3/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

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-2025-21872

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: 3/20/2025

Reference Information

CVE: CVE-2025-21872

Detections

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