diff --git a/musl_src.gni b/musl_src.gni
index ef600af8a5e5bd1838f6a9c8864a3d3d4b85f5fc..86008dea2aba565eacb3f10fc40158da7336c4b2 100644
--- a/musl_src.gni
+++ b/musl_src.gni
@@ -2190,6 +2190,7 @@ musl_src_porting_file = [
   "src/stdio/stderr.c",
   "src/stdio/fgets.c",
   "src/stdio/vsnprintf.c",
+  "src/stdio/vsscanf.c",
   "src/internal/stdio_impl.h",
   "src/internal/vdso.c",
   "src/time/clock_gettime.c",
diff --git a/porting/linux/user/src/stdio/vsscanf.c b/porting/linux/user/src/stdio/vsscanf.c
new file mode 100644
index 0000000000000000000000000000000000000000..f0c4a7d01d35e7e91c3f7dc7399b820e8b54a799
--- /dev/null
+++ b/porting/linux/user/src/stdio/vsscanf.c
@@ -0,0 +1,21 @@
+#include "stdio_impl.h"
+#include <string.h>
+
+// Empty implementation because vfscanf operates rpos directly.
+static size_t string_read(FILE *f, unsigned char *buf, size_t len)
+{
+	return 0;
+}
+
+int vsscanf(const char *restrict s, const char *restrict fmt, va_list ap)
+{
+	size_t s_len = strlen(s);
+	FILE f = {
+		.buf = (void *)s, .cookie = (void *)s,
+		.read = string_read, .lock = -1,
+		.buf_size = s_len, .rpos = s, .rend = s + s_len,
+	};
+	return vfscanf(&f, fmt, ap);
+}
+
+weak_alias(vsscanf,__isoc99_vsscanf);