@@ -20,6 +20,7 @@ SRC_URI = "${KERNELORG_MIRROR}/linux/utils/util-linux/v${MAJOR_VERSION}/util-lin
file://0001-lsfd-mkfds-foreign-sockets-skip-when-lacking-sock_di.patch \
file://0001-ts-kill-decode-use-RTMIN-from-kill-L-instead-of-hard.patch \
file://0001-tests-script-Disable-size-option-test.patch \
+ file://CVE-2026-3184.patch \
"
SRC_URI[sha256sum] = "f586e35d320ff537aab3ffeca37e9ecd482ccbe013590db4429a414d8aa6a728"
new file mode 100644
@@ -0,0 +1,63 @@
+From 8b29aeb081e297e48c4c1ac53d88ae07e1331984 Mon Sep 17 00:00:00 2001
+From: Karel Zak <kzak@redhat.com>
+Date: Thu, 19 Feb 2026 12:20:28 +0100
+Subject: [PATCH] login: use original FQDN for PAM_RHOST
+
+When login -h <remotehost> is invoked, init_remote_info() strips the
+local domain suffix from the hostname (FQDN to short name) before
+storing it in cxt->hostname. This truncated value is then used for
+PAM_RHOST, which can bypass pam_access host deny rules that match on
+the FQDN.
+
+Preserve the original -h hostname in a new cmd_hostname field and use
+it for PAM_RHOST, while keeping the truncated hostname for utmp/wtmp
+and logging unchanged.
+
+Note, the real-world impact is low -- login -h is only used by legacy
+telnet/rlogin daemons, and exploitation requires FQDN-specific
+pam_access rules on a system still using these obsolete services.
+
+Reported-by: Asim Viladi Oglu Manizada <manizada@pm.me>
+Signed-off-by: Karel Zak <kzak@redhat.com>
+
+CVE: CVE-2026-3184
+Upstream-Status: Backport [https://github.com/util-linux/util-linux/commit/8b29aeb081e297e48c4c1ac53d88ae07e1331984]
+
+Signed-off-by: Jakub Szczudlo <jakub.szczudlo@nokia.com>
+---
+ login-utils/login.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/login-utils/login.c b/login-utils/login.c
+index 321f9d6..0c5c805 100644
+--- a/login-utils/login.c
++++ b/login-utils/login.c
+@@ -128,6 +128,7 @@ struct login_context {
+ char *thishost; /* this machine */
+ char *thisdomain; /* this machine's domain */
+ char *hostname; /* remote machine */
++ char *cmd_hostname; /* remote machine as specified on command line */
+ char hostaddress[16]; /* remote address */
+
+ pid_t pid;
+@@ -906,7 +907,7 @@ static pam_handle_t *init_loginpam(struct login_context *cxt)
+
+ /* hostname & tty are either set to NULL or their correct values,
+ * depending on how much we know. */
+- rc = pam_set_item(pamh, PAM_RHOST, cxt->hostname);
++ rc = pam_set_item(pamh, PAM_RHOST, cxt->cmd_hostname);
+ if (is_pam_failure(rc))
+ loginpam_err(pamh, rc);
+
+@@ -1249,6 +1250,8 @@ static void init_remote_info(struct login_context *cxt, char *remotehost)
+
+ get_thishost(cxt, &domain);
+
++ cxt->cmd_hostname = xstrdup(remotehost);
++
+ if (domain && (p = strchr(remotehost, '.')) &&
+ strcasecmp(p + 1, domain) == 0)
+ *p = '\0';
+--
+2.34.1
+
Backport patch to fix CVE-2026-3184. References: https://nvd.nist.gov/vuln/detail/CVE-2026-3184 Upstream fix: https://github.com/util-linux/util-linux/commit/8b29aeb081e297e48c4c1ac53d88ae07e1331984 Tested with ptest Signed-off-by: Jakub Szczudlo <jakub.szczudlo@nokia.com> --- meta/recipes-core/util-linux/util-linux.inc | 1 + .../util-linux/util-linux/CVE-2026-3184.patch | 63 +++++++++++++++++++ 2 files changed, 64 insertions(+) create mode 100644 meta/recipes-core/util-linux/util-linux/CVE-2026-3184.patch