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Chainguard: linux-qemu-melange: security update to 6.18.49-r2

high Tenable Cloud Security Plugin ID 472544

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: hsr: defer node table free until
 after RCU readers HSR node-list and node-status generic-netlink operations run under rcu_read_lock(). They
 walk hsr->node_db through hsr_get_next_node() and hsr_get_node_data(), but RTM_DELLINK teardown removes
 the same node table with plain list_del() and frees each node immediately. That lets a generic-netlink
 reader hold a struct hsr_node pointer across hsr_dellink(). In a KASAN build, widening the reader window
 after hsr_get_next_node() obtains the node reproduces a slab-use-after-free when the reader copies
 node->macaddress_A; the freeing stack is hsr_del_nodes() from hsr_dellink(). Use list_del_rcu() and defer
 the free through the existing hsr_free_node_rcu() callback. This matches the lifetime rule used by the HSR
 prune paths, which already delete nodes with list_del_rcu() and call_rcu(). (CVE-2026-64123)

Solution

Update the linux-qemu-melange library and its related packages to version 6.18.49-r2 or later.

Plugin Details

Severity: High

ID: 472544

Version: Revision 1.1

Type: Local

Published: 10/3/2026

Updated: 10/3/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.11

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-2026-64123

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: 6/25/2026

Reference Information

CVE: CVE-2026-64123