CVE-2025-37917

net: ethernet: mtk-star-emac: fix spinlock recursion issues on rx/tx poll

MEDIUM

5.5

CVSS Score

Published: May 20, 2025 at 03:21 PM UTC

Updated: October 15, 2026 at 02:17 AM UTC

5 products affected across 3 vendorsLinux KernelDebian LinuxSIMATIC S7-1500 CPU 1518-4 Pn /dp MFP Firmware

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.6%

Description

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: mtk-star-emac: fix spinlock recursion issues on rx/tx poll Use spin_lock_irqsave and spin_unlock_irqrestore instead of spin_lock and spin_unlock in mtk_star_emac driver to avoid spinlock recursion occurrence that can happen when enabling the DMA interrupts again in rx/tx poll. ``` BUG: spinlock recursion on CPU#0, swapper/0/0 lock: 0xffff00000db9cf20, .magic: dead4ead, .owner: swapper/0/0, .owner_cpu: 0 CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.15.0-rc2-next-20250417-00001-gf6a27738686c-dirty #28 PREEMPT Hardware name: MediaTek MT8365 Open Platform EVK (DT) Call trace: show_stack+0x18/0x24 (C) dump_stack_lvl+0x60/0x80 dump_stack+0x18/0x24 spin_dump+0x78/0x88 do_raw_spin_lock+0x11c/0x120 _raw_spin_lock+0x20/0x2c mtk_star_handle_irq+0xc0/0x22c [mtk_star_emac] __handle_irq_event_percpu+0x48/0x140 handle_irq_event+0x4c/0xb0 handle_fasteoi_irq+0xa0/0x1bc handle_irq_desc+0x34/0x58 generic_handle_domain_irq+0x1c/0x28 gic_handle_irq+0x4c/0x120 do_interrupt_handler+0x50/0x84 el1_interrupt+0x34/0x68 el1h_64_irq_handler+0x18/0x24 el1h_64_irq+0x6c/0x70 regmap_mmio_read32le+0xc/0x20 (P) _regmap_bus_reg_read+0x6c/0xac _regmap_read+0x60/0xdc regmap_read+0x4c/0x80 mtk_star_rx_poll+0x2f4/0x39c [mtk_star_emac] __napi_poll+0x38/0x188 net_rx_action+0x164/0x2c0 handle_softirqs+0x100/0x244 __do_softirq+0x14/0x20 ____do_softirq+0x10/0x20 call_on_irq_stack+0x24/0x64 do_softirq_own_stack+0x1c/0x40 __irq_exit_rcu+0xd4/0x10c irq_exit_rcu+0x10/0x1c el1_interrupt+0x38/0x68 el1h_64_irq_handler+0x18/0x24 el1h_64_irq+0x6c/0x70 cpuidle_enter_state+0xac/0x320 (P) cpuidle_enter+0x38/0x50 do_idle+0x1e4/0x260 cpu_startup_entry+0x34/0x3c rest_init+0xdc/0xe0 console_on_rootfs+0x0/0x6c __primary_switched+0x88/0x90 ```

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

11.0

Linux Kernel · Linux

95%

6.0 ≤ v < 6.1.1386.13 ≤ v < 6.14.66.2 ≤ v < 6.6.906.7 ≤ v < 6.12.280a8bd81fd6aaace14979152e0540da8ff158a00a6.15 6.15 rc1 6.15 rc2 6.15 rc3 6.15 rc497da99868573b8861de83f7126a5981d896c1d6c

Vendor states this is fixed in 6fe0866014486736cc3ba1c6fd4606d3dbe55c9c (fixed)

Vendor states this is fixed in 7cb10f17bddc415f30fbc00a4e2b490e0d94c462 (fixed)

Vendor states this is fixed in 8d40bf73fa7f31eac2b0a7c9d85de67df82ee7f3 (fixed)

Vendor states this is fixed in 94107259f972d2fd896dbbcaa176b3b2451ff9e5 (fixed)

Vendor states this is fixed in bedd287fdd3142dffad7ae2ac6ef15f4a2ad0629 (fixed)

Vendor states this is fixed in d886f8d85494d12b2752fd7c6c32162d982d5dd5 (fixed)

Vendor states this is fixed in 6.0 (unaffected)

Vendor states this is fixed in 6.1.138 (unaffected)

Vendor states this is fixed in 6.12.28 (unaffected)

Vendor states this is fixed in 6.14.6 (unaffected)

Vendor states this is fixed in 6.15 (unaffected)

Vendor states this is fixed in 6.6.90 (unaffected)