CVE-2026-46031— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ks8851驱动在IRQ处理程序中未禁用下半部，可能导致死锁。
可能的 ATT&CK 技术 1 AI
T1496 · Resource Hijacking影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 8a3ff43dcbab7c96f9e8cf2bd1049ab8d6e59545< 1962027a6d223f90df8b372929f9d1a8d321ad6a |
affected |
ae87f661f3c1a3134a7ed86ab69bf9f12af88993< 640a7631d31db87d5fa1b34cea44a99b6e78854b |
affected | ||
e0863634bf9f7cf36291ebb5bfa2d16632f79c49< 518040324067d8efaa2da1992297b7e7bf5640f4 |
affected | ||
e0863634bf9f7cf36291ebb5bfa2d16632f79c49< be8aad558b4675f45b43080f81a9ffdeddea73a5 |
affected | ||
e0863634bf9f7cf36291ebb5bfa2d16632f79c49< 21f1707a8e978558dcb11b053855521e32ac0eec |
affected | ||
e0863634bf9f7cf36291ebb5bfa2d16632f79c49< 5c9fcac3c872224316714d0d8914d9af16c76a6d |
affected | ||
7e2901a2a9195da76111f351584bf77552a038f0 |
affected | ||
6.1.91< 6.1.175 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-46031 基础信息
漏洞信息
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Vulnerability Title
net: ks8851: Reinstate disabling of BHs around IRQ handler
来源: CVE Program / CVE List V5
Vulnerability Description
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
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ks8851驱动在IRQ处理程序中未禁用下半部，可能导致死锁。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-46031 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-46031 补丁与修复 (5)
同批安全公告 · Linux · 2026-05-27 · 共 275 条
| CVE-2026-45972 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-45988 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46039 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-45898 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46043 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-46056 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-45945 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-71311 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-45843 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46037 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46099 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46010 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46076 | 7.9 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-45909 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46015 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46036 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46062 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-46065 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-45878 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-45894 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 275 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-46031
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