diff --git a/0020-fix-CVE-2025-24528.patch b/0020-fix-CVE-2025-24528.patch
new file mode 100644
index 0000000000000000000000000000000000000000..0fd22dd11c897bbaaa943fa2cda8397618ae4213
--- /dev/null
+++ b/0020-fix-CVE-2025-24528.patch
@@ -0,0 +1,59 @@
+From 78ceba024b64d49612375be4a12d1c066b0bfbd0 Mon Sep 17 00:00:00 2001
+From: Zoltan Borbely <Zoltan.Borbely@morganstanley.com>
+Date: Tue, 28 Jan 2025 16:39:25 -0500
+Subject: [PATCH] Prevent overflow when calculating ulog block size
+
+In kdb_log.c:resize(), log an error and fail if the update size is
+larger than the largest possible block size (2^16-1).
+
+CVE-2025-24528:
+
+In MIT krb5 release 1.7 and later with incremental propagation
+enabled, an authenticated attacker can cause kadmind to write beyond
+the end of the mapped region for the iprop log file, likely causing a
+process crash.
+
+[ghudson@mit.edu: edited commit message and added CVE description]
+
+ticket: 9159 (new)
+tags: pullup
+target_version: 1.21-next
+---
+ src/lib/kdb/kdb_log.c | 10 ++++++++--
+ 1 file changed, 8 insertions(+), 2 deletions(-)
+
+diff --git a/src/lib/kdb/kdb_log.c b/src/lib/kdb/kdb_log.c
+index 2659a250187..68fae919a52 100644
+--- a/src/lib/kdb/kdb_log.c
++++ b/src/lib/kdb/kdb_log.c
+@@ -183,7 +183,7 @@ extend_file_to(int fd, unsigned int new_size)
+  */
+ static krb5_error_code
+ resize(kdb_hlog_t *ulog, uint32_t ulogentries, int ulogfd,
+-       unsigned int recsize)
++       unsigned int recsize, const kdb_incr_update_t *upd)
+ {
+     unsigned int new_block, new_size;
+ 
+@@ -195,6 +195,12 @@ resize(kdb_hlog_t *ulog, uint32_t ulogentries, int ulogfd,
+     new_block *= ULOG_BLOCK;
+     new_size += ulogentries * new_block;
+ 
++    if (new_block > UINT16_MAX) {
++        syslog(LOG_ERR, _("ulog overflow caused by principal %.*s"),
++               upd->kdb_princ_name.utf8str_t_len,
++               upd->kdb_princ_name.utf8str_t_val);
++        return KRB5_LOG_ERROR;
++    }
+     if (new_size > MAXLOGLEN)
+         return KRB5_LOG_ERROR;
+ 
+@@ -291,7 +297,7 @@ store_update(kdb_log_context *log_ctx, kdb_incr_update_t *upd)
+     recsize = sizeof(kdb_ent_header_t) + upd_size;
+ 
+     if (recsize > ulog->kdb_block) {
+-        retval = resize(ulog, ulogentries, log_ctx->ulogfd, recsize);
++        retval = resize(ulog, ulogentries, log_ctx->ulogfd, recsize, upd);
+         if (retval)
+             return retval;
+     }
diff --git a/krb5.spec b/krb5.spec
index 318a1e52079dbefef1f3d943353c2615085fe16c..c2102202332fd2f745809d28e0e06afcaf2d4110 100644
--- a/krb5.spec
+++ b/krb5.spec
@@ -1,4 +1,4 @@
-%define anolis_release 4
+%define anolis_release 5
 
 # Set this so that find-lang.sh will recognize the .po files.
 %global gettext_domain mit-krb5
@@ -48,6 +48,8 @@ Patch17: 0017-fix-CVE-2024-26462.patch
 Patch18: 0018-fix-CVE-2024-26461-CVE-2024-26458.patch
 #https://github.com/krb5/krb5/commit/55fbf435edbe2e92dd8101669b1ce7144bc96fef
 Patch19: 0019-fix-cve-2024-37370-and-cve-2024-37371.patch
+# https://github.com/krb5/krb5/commit/78ceba024b64d49612375be4a12d1c066b0bfbd0
+Patch20: 0020-fix-CVE-2025-24528.patch
 
 License: MIT
 URL: https://web.mit.edu/kerberos/www/
@@ -683,6 +685,9 @@ exit 0
 %{_datarootdir}/%{name}-tests/
 
 %changelog
+* Thu Aug 14 2025 Bo Ren <rb01097748@alibaba-inc.com> - 1.21.2-5
+- fix CVE-2025-24528
+
 * Tue Jan 14 2025 yangxinyu <yangxinyu@nfschina.com> - 1.21.2-4
 - fix CVE-2024-37370 CVE-2024-37371