1 files changed, 14 insertions, 0 deletions

diff --git a/src/firejail/sandbox.c b/src/firejail/sandbox.c
index f26f8b06a..d1557e8b2 100644
--- a/src/firejail/sandbox.c
+++ b/src/firejail/sandbox.c
@@ -742,6 +742,20 @@ int sandbox(void* sandbox_arg) {
                 else {
                         // private-tmp is implemented as a whitelist
                         EUID_USER();
+                        // check XAUTHORITY file, KDE keeps it under /tmp
+                        char *xauth = getenv("XAUTHORITY");
+                        if (xauth) {
+                                char *rp = realpath(xauth, NULL);
+                                if (rp && strncmp(rp, "/tmp/", 5) == 0) {
+                                        char *cmd;
+                                        if (asprintf(&cmd, "whitelist %s", rp) == -1)
+                                                errExit("asprintf");
+                                        profile_add(cmd); // profile_add does not duplicate the string
+                                }
+                                if (rp)
+                                        free(rp);
+                        }
+                        // whitelist x11 directory
                         profile_add("whitelist /tmp/.X11-unix");
                         EUID_ROOT();
                 }