src/internal/cpu/cpu_x86_netbsd.go | 32 ++++++++++++++++++++++++++++++++
 src/internal/cpu/cpu_x86_other.go  |  2 +-

diff --git a/src/internal/cpu/cpu_x86_netbsd.go b/src/internal/cpu/cpu_x86_netbsd.go
new file mode 100644
index 0000000000000000000000000000000000000000..eca3540bb21a65cf18bf648f44ffe83696ed399a
--- /dev/null
+++ b/src/internal/cpu/cpu_x86_netbsd.go
@@ -0,0 +1,32 @@
+// Copyright 2026 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build (386 || amd64) && netbsd
+
+package cpu
+
+func osInit() {
+	// NetBSD corrupts avx registers when receiving signals.
+	// See issue 80285.
+	// TODO: when NetBSD fixes the bug, add a version
+	// check and skip here.
+	X86.HasAVX = false
+	X86.HasAVX2 = false
+	// Set these also, just to be safe
+	X86.HasAVXVNNI = false
+	X86.HasAVX512 = false
+	X86.HasAVX512F = false
+	X86.HasAVX512CD = false
+	X86.HasAVX512BW = false
+	X86.HasAVX512DQ = false
+	X86.HasAVX512VL = false
+	X86.HasAVX512GFNI = false
+	X86.HasAVX512VAES = false
+	X86.HasAVX512VNNI = false
+	X86.HasAVX512VBMI = false
+	X86.HasAVX512VBMI2 = false
+	X86.HasAVX512BITALG = false
+	X86.HasAVX512VPOPCNTDQ = false
+	X86.HasAVX512VPCLMULQDQ = false
+}
diff --git a/src/internal/cpu/cpu_x86_other.go b/src/internal/cpu/cpu_x86_other.go
index 824131226c643ecc5cf3bebdda7174af63ea6bee..5b46300e2712a9379f17be0668980b27b2dd1ee6 100644
--- a/src/internal/cpu/cpu_x86_other.go
+++ b/src/internal/cpu/cpu_x86_other.go
@@ -2,7 +2,7 @@ // Copyright 2025 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (386 || amd64) && (!darwin || ios)
+//go:build (386 || amd64) && (!darwin || ios) && !netbsd
 
 package cpu