Detections
Analytics

Echo: linux: security update to 6.1.176-1

medium Tenable Cloud Security Plugin ID 460454

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: usb: gadget: f_phonet: fix skb frags[]
 overflow in pn_rx_complete() A broken/bored/mean USB host can overflow the skb_shared_info->frags[] array
 on a Linux gadget exposing a Phonet function by sending an unbounded sequence of full-page OUT transfers.
 pn_rx_complete() finalizes the skb only when req->actual < req->length, where req->length is set to
 PAGE_SIZE by the gadget. If the host always sends exactly PAGE_SIZE bytes per transfer, fp->rx.skb will
 never be reset and each completion will add another fragment via skb_add_rx_frag(). Once nr_frags exceeds
 MAX_SKB_FRAGS (default 17), subsequent frag stores overwrite memory adjacent to the shinfo on the heap.
 Drop the skb and account a length error when the frag limit is reached, matching the fix applied in t7xx
 by commit f0813bcd2d9d ("net: wwan: t7xx: fix potential skb->frags overflow in RX path"). (CVE-2026-31616)

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-2026-31616

Plugin Details

Severity: Medium

ID: 460454

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-2026-31616

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: 5/1/2026

Vulnerability Publication Date: 4/24/2026

Reference Information

CVE: CVE-2026-31616