CVE-2026-98946— V3D 驱动运行时挂起中断禁用漏洞
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。
在 Linux 内核中，以下漏洞已得到修复： drm/vc4：在运行时挂起期间禁用 V3D 中断 函数会屏蔽 V3D 的中断源，随后在关闭 V3D 电源之前调用 。然而，仅凭这些操作并不足以让中断处理程序完全停止运行。 会等待那些已设置 标志的处理程序，以及那些报告 状态的中断控制器（irqchip）。GIC 中断控制器可以在 CPU 确认中断后立即将中断标记为“活跃”，因此上述检查能够覆盖整个中断分发路径。但在树莓派（RPi）0 至 3 系列设备上，中断控制器为 ARMCTRL，它不具备“活跃状态”的概念。如果某
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一、 漏洞 CVE-2026-98946 基础信息
漏洞信息
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Vulnerability Title
drm/vc4: Disable the V3D interrupt across runtime suspend
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
drm/vc4: Disable the V3D interrupt across runtime suspend
vc4_irq_disable() masks the V3D interrupt sources and then calls
synchronize_irq() before the V3D is powered down. However, by itself,
this is not enough to quiesce the interrupt handler.
synchronize_irq() waits for handlers that have already set
IRQD_IRQ_INPROGRESS, and for irqchips reporting IRQCHIP_STATE_ACTIVE.
A GIC interrupt chip is able to mark an interrupt active as soon as a
CPU acknowledges it, so there these checks cover the whole dispatch path.
On RPi 0-3, however, the interrupt controller is ARMCTRL, which has no
active state. A CPU that has read the hwirq out of the pending register
but has not yet reached handle_level_irq() stays invisible to
synchronize_irq().
During a power transition, vc4_irq() may therefore run after the power
domain is off, where every V3D register read will return 0xdeadbeef.
0xdeadbeef has FLDONE, FRDONE and OUTOMEM set. This problem doesn't
trigger NULL pointer dereference issues only because the functions
vc4_irq_finish_bin_job() and vc4_irq_finish_render_job() return early
when there is no job pointer, but OUTOMEM is still able to schedule
vc4_overflow_mem_work() after vc4_irq_disable() has already cancelled it.
Therefore, fix the spurious interrupts by disabling the interrupt line
across the PM transition. To preserve the enable/disable balance, move
vc4_irq_install() and request the IRQ line disabled before the first
runtime resume.
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-98946 的公开POC
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CVE-2026-98946 其他参考 (2)
同批安全公告 · Linux · 2026-10-23 · 共 218 条
| CVE-2026-98937 | Linux 内核 perf 远程代码执行漏洞 | |
| CVE-2026-98951 | Linux RISC-V 内核 ptrace 缓冲区未初始化漏洞 | |
| CVE-2026-98950 | Linux kernel flow_dissector 整数截断漏洞 | |
| CVE-2026-98949 | Imagination DRM 驱动 remap() 函数引用及 vm_bo 处理漏洞 | |
| CVE-2026-98948 | Mellanox mlxsw 端口范围寄存器泄漏漏洞 | |
| CVE-2026-98947 | vsock 内存泄漏漏洞 | |
| CVE-2026-98945 | Steam HID 驱动解绑顺序漏洞 | |
| CVE-2026-98944 | Steam HID 注册重构漏洞 | |
| CVE-2026-98943 | Steam HID 驱动锁清理 | |
| CVE-2026-98942 | Linux 内核 sched_ext 远程代码执行漏洞 | |
| CVE-2026-98941 | ext4 加密 inode 大页启用逻辑漏洞 | |
| CVE-2026-98940 | Linux 内核 ASoC 组件越界读取漏洞 | |
| CVE-2026-98939 | Linux x86/mm 内存管理逻辑缺陷 | |
| CVE-2026-98938 | Rust IRQ 请求机制参数传递漏洞 | |
| CVE-2026-98926 | AMD Display 驱动 DPMS 电源管理漏洞 | |
| CVE-2026-98929 | macsec 在注册前初始化 SecY 的竞态条件漏洞 | |
| CVE-2026-98928 | KVM arm64 信息泄露漏洞 | |
| CVE-2026-98927 | KVM arm64 嵌套 MMU 数组生命周期漏洞 | |
| CVE-2026-98930 | KVM s390 中断注入漏洞 | |
| CVE-2026-98925 | Linux bpf sockmap 序列号重复计数漏洞 |
显示前 20 条，共 218 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-98946
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