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Echo: linux: security update to 6.1.176-1

high Tenable Self-Hosted Container Security Plugin ID 461549

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: net: ks8851: Reinstate disabling of
 BHs around IRQ handler If the driver executes ks8851_irq() AND a TX packet has been sent, then the driver
 enables TX queue via netif_wake_queue() which schedules TX softirq to queue packets for this device. If
 CONFIG_PREEMPT_RT=y is set AND a packet has also been received by the MAC, then ks8851_rx_pkts() calls
 netdev_alloc_skb_ip_align() to allocate SKBs for the received packets. If netdev_alloc_skb_ip_align() is
 called with BH enabled, then local_bh_enable() at the end of netdev_alloc_skb_ip_align() will trigger the
 pending softirq processing, which may ultimately call the .xmit callback ks8851_start_xmit_par(). The
 ks8851_start_xmit_par() will try to lock struct ks8851_net_par .lock spinlock, which is already locked by
 ks8851_irq() from which ks8851_start_xmit_par() was called. This leads to a deadlock, which is reported by
 the kernel, including a trace listed below. If CONFIG_PREEMPT_RT is not set, then since commit
 0913ec336a6c0 ("net: ks8851: Fix deadlock with the SPI chip variant") the deadlock can also be triggered
 without received packet in the RX FIFO. The pending softirqs will be processed on return from
 spin_unlock_bh(&ks->statelock) in ks8851_irq(), which triggers the deadlock as well. Fix the problem by
 disabling BH around critical sections, including the IRQ handler, thus preventing the net_tx_action()
 softirq from triggering during these critical sections. The net_tx_action() softirq is triggered once BH
 are re-enabled and at the end of the IRQ handler, once all the other IRQ handler actions have been
 completed. __schedule from schedule_rtlock+0x1c/0x34 schedule_rtlock from
 rtlock_slowlock_locked+0x548/0x904 rtlock_slowlock_locked from rt_spin_lock+0x60/0x9c rt_spin_lock from
 ks8851_start_xmit_par+0x74/0x1a8 ks8851_start_xmit_par from netdev_start_xmit+0x20/0x44 netdev_start_xmit
 from dev_hard_start_xmit+0xd0/0x188 dev_hard_start_xmit from sch_direct_xmit+0xb8/0x25c sch_direct_xmit
 from __qdisc_run+0x1f8/0x4ec __qdisc_run from qdisc_run+0x1c/0x28 qdisc_run from net_tx_action+0x1f0/0x268
 net_tx_action from handle_softirqs+0x1a4/0x270 handle_softirqs from __local_bh_enable_ip+0xcc/0xe0
 __local_bh_enable_ip from __alloc_skb+0xd8/0x128 __alloc_skb from __netdev_alloc_skb+0x3c/0x19c
 __netdev_alloc_skb from ks8851_irq+0x388/0x4d4 ks8851_irq from irq_thread_fn+0x24/0x64 irq_thread_fn from
 irq_thread+0x178/0x28c irq_thread from kthread+0x12c/0x138 kthread from ret_from_fork+0x14/0x28
 (CVE-2026-46031)

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-2026-46031

Plugin Details

Severity: High

ID: 461549

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: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-46031

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/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: 5/28/2026

Vulnerability Publication Date: 5/27/2026

Reference Information

CVE: CVE-2026-46031