--- a/sandbox-seccomp-filter.c
+++ b/sandbox-seccomp-filter.c
@@ -257,6 +257,15 @@ static const struct sock_filter preauth_insns[] = {
 #ifdef __NR_statx
 	SC_DENY(__NR_statx, EACCES),
 #endif
+#ifdef __NR_shmget
+	SC_DENY(__NR_shmget, EACCES),
+#endif
+#ifdef __NR_shmat
+	SC_DENY(__NR_shmat, EACCES),
+#endif
+#ifdef __NR_shmdt
+	SC_DENY(__NR_shmdt, EACCES),
+#endif
 
 	/* Syscalls to permit */
 #ifdef __NR_brk