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

high Tenable Cloud Security Plugin ID 473075

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: riscv: Fix register corruption from
 uninitialized cregs on error compat_riscv_gpr_set() calls cregs_to_regs() unconditionally, even when
 user_regset_copyin() fails. Since cregs is an uninitialized stack variable, a copyin failure causes
 uninitialized stack data to be written into the target task's pt_regs, corrupting its register state and
 potentially leaking kernel stack contents. compat_restore_sigcontext() has the same issue: it calls
 cregs_to_regs() even when __copy_from_user() fails, leading to the same corruption of the signal-returning
 task's register state on error. Only call cregs_to_regs() when the user copy succeeds. (CVE-2026-64082)

Solution

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

Plugin Details

Severity: High

ID: 473075

Version: Revision 1.2

Type: Local

Published: 10/6/2026

Updated: 10/8/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

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-2026-64082

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: 7/19/2026

Reference Information

CVE: CVE-2026-64082