Add UPDATING entries and bump versionrelease/15.1.0-p4

Approved by:	so

2 files changed, 25 insertions, 1 deletions

diff --git a/UPDATING b/UPDATING
index f14568ba2c75..139b1f3d0fbf 100644
--- a/UPDATING
+++ b/UPDATING
@@ -12,6 +12,30 @@ Items affecting the ports and packages system can be found in
 /usr/ports/UPDATING.  Please read that file before updating system packages
 and/or ports.
 
+20260928:
+	15.1-RELEASE-p4	EN-26:23.syslogd
+			EN-26:24.tzdata
+			SA-26:64.sysvsem
+			SA-26:65.kqueue
+			SA-26:66.jail
+			SA-26:67.ktls
+			SA-26:68.openssl
+			SA-26:69.udp
+
+	Timezone database information update. [EN-26:24.tzdata]
+
+	Heap out-of-bounds access in semop(2). [SA-26:64.sysvsem]
+
+	Memory safety bugs in kqueue copy-on-fork implementation. [SA-26:65.kqueue]
+
+	Multiple jail filesystem root escapes. [SA-26:66.jail]
+
+	Remote DOS via receive-side kernel TLS. [SA-26:67.ktls]
+
+	OpenSSL CVE-2026-84782. [SA-268:68.openssl]
+
+	UDP sendto(2) bypasses jail network isolation. [SA-26:69.udp]
+
 20260825:
 	15.1-RELEASE-p3	EN-26:20.microcode
 			SA-26:56.hwpmc
diff --git a/sys/conf/newvers.sh b/sys/conf/newvers.sh
index 5a366075b5c8..63eadb4874df 100644
--- a/sys/conf/newvers.sh
+++ b/sys/conf/newvers.sh
@@ -51,7 +51,7 @@
 
 TYPE="FreeBSD"
 REVISION="15.1"
-BRANCH="RELEASE-p3"
+BRANCH="RELEASE-p4"
 if [ -n "${BRANCH_OVERRIDE}" ]; then
 	BRANCH=${BRANCH_OVERRIDE}
 fi