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Echo: linux: security update to 6.1.176-1

medium Tenable Cloud Security Plugin ID 457827

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: batman-adv: frag: disallow unicast
 fragment in fragment batadv_frag_skb_buffer() is called by batadv_batman_skb_recv() when a
 BATADV_UNICAST_FRAG packet is received. Once all fragments are collected and the packet is reassembled,
 batadv_recv_frag_packet() calls batadv_batman_skb_recv() again to process the defragmented payload. A
 malicious sender can craft a BATADV_UNICAST_FRAG packet whose reassembled payload is itself a
 BATADV_UNICAST_FRAG packet (matryoshka-style nesting). Each nesting level recurses through
 batadv_batman_skb_recv() without bound, growing the kernel stack until it is exhausted. Since
 refragmentation or fragments in fragments are not actually allowed, discard all packets which are still
 BATADV_UNICAST_FRAG packets after the defragmentation process. (CVE-2026-52916)

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-2026-52916

Plugin Details

Severity: Medium

ID: 457827

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

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-2026-52916

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: 6/25/2026

Vulnerability Publication Date: 6/3/2026

Reference Information

CVE: CVE-2026-52916