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Chainguard: multiple linux-gcp-6.18-bootc packages: security update to 6.18.38-r2

medium Tenable Cloud Security Plugin ID 473067

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: drm/amd/display: Wrap DCN32 phantom-
 plane allocation in DC_RUN_WITH_PREEMPTION_ENABLED [Why] dcn32_validate_bandwidth() wraps
 dcn32_internal_validate_bw() with DC_FP_START()/DC_FP_END(). In x86 non-RT, DC_FP_START takes
 fpregs_lock(), which disables local softirqs. The DML1 path through dcn32_enable_phantom_plane() calls
 kvzalloc() to allocate ~335 KiB for dc_plane_state. This triggers the vmalloc path, which calls
 BUG_ON(in_interrupt()) because it's invoked within the FPU-enabled (softirq disabled) region, leading to a
 kernel crash. [How] Wrap the dc_state_create_phantom_plane() call with the
 DC_RUN_WITH_PREEMPTION_ENABLED() macro to allow preemption during this memory allocation. (cherry picked
 from commit 885ccbef7b94a8b38f69c4211c679021aa27ad11) (CVE-2026-53285)

Solution

Update the linux-gcp-6.18-bootc library and its related packages to version 6.18.38-r2 or later.

Plugin Details

Severity: Medium

ID: 473067

Version: Revision 1.1

Type: Local

Published: 10/6/2026

Updated: 10/6/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.75

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-2026-53285

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: 6/26/2026

Reference Information

CVE: CVE-2026-53285