Echo: linux: security update to 6.1.137-1

medium Tenable Cloud Security Plugin ID 455622

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: LoongArch: Return NULL from
huge_pte_offset() for invalid PMD LoongArch's huge_pte_offset() currently returns a pointer to a PMD slot
even if the underlying entry points to invalid_pte_table (indicating no mapping). Callers like
smaps_hugetlb_range() fetch this invalid entry value (the address of invalid_pte_table) via this pointer.
The generic is_swap_pte() check then incorrectly identifies this address as a swap entry on LoongArch,
because it satisfies the "!pte_present() && !pte_none()" conditions. This misinterpretation, combined with
a coincidental match by is_migration_entry() on the address bits, leads to kernel crashes in
pfn_swap_entry_to_page(). Fix this at the architecture level by modifying huge_pte_offset() to check the
PMD entry's content using pmd_none() before returning. If the entry is invalid (i.e., it points to
invalid_pte_table), return NULL instead of the pointer to the slot. (CVE-2025-37818)

Solution

Update the linux library and its related packages to version 6.1.137-1 or later.

Plugin Details

Severity: Medium

ID: 455622

Version: Revision 1.1

Type: Local

Family: Echo Local Security Checks

Published: 10/1/2026

Updated: 10/1/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.24

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-2025-37818

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

Patch Publication Date: 9/15/2025

Vulnerability Publication Date: 5/8/2025

Reference Information

CVE: CVE-2025-37818

Detections

Analytics