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Echo: linux: security update to 6.1.176-1

high Tenable Self-Hosted Container Security Plugin ID 463254

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: ocfs2: fix use-after-free in
 ocfs2_fault() when VM_FAULT_RETRY filemap_fault() may drop the mmap_lock before returning VM_FAULT_RETRY,
 as documented in mm/filemap.c: "If our return value has VM_FAULT_RETRY set, it's because the mmap_lock may
 be dropped before doing I/O or by lock_folio_maybe_drop_mmap()." When this happens, a concurrent munmap()
 can call remove_vma() and free the vm_area_struct via RCU. The saved 'vma' pointer in ocfs2_fault() then
 becomes a dangling pointer, and the subsequent trace_ocfs2_fault() call dereferences it -- a use-after-
 free. Fix this by saving ip_blkno as a plain integer before calling filemap_fault(), and removing vma from
 the trace event. Since ip_blkno is copied by value before the lock can be dropped, it remains valid
 regardless of what happens to the vma or inode afterward. (CVE-2026-31597)

Solution

Update the linux library and its related packages to version 6.1.176-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-31597

Plugin Details

Severity: High

ID: 463254

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.76

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-2026-31597

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

Patch Publication Date: 5/1/2026

Vulnerability Publication Date: 4/24/2026

Reference Information

CVE: CVE-2026-31597