igc: fix PTM cycle trigger logic

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CVE-2025-37875

CVE-25-37875 concerns the Linux kernel igc/PTM logic. The issue arose from writing to clear the PTM status 'valid' bit while a PTM cycle was in progress, causing unreliablePTM operation. The fix disables PTM trigger most of the time and limits triggering to very brief windows (roughly 10–100 μs) ...

CVE-2025-37875 igc: fix PTM cycle trigger logic

In the Linux kernel, the following vulnerability has been resolved: igc: fix PTM cycle trigger logic Writing to clear the PTM status 'valid' bit while the PTM cycle is triggered results in unreliable PTM operation. To fix this, clear the PTM 'trigger' and status after each PTM transaction. The...

CVE-2025-37875

In the Linux kernel, the following vulnerability has been resolved: igc: fix PTM cycle trigger logic Writing to clear the PTM status 'valid' bit while the PTM cycle is triggered results in unreliable PTM operation. To fix this, clear the PTM 'trigger' and status after each PTM transaction. The...