ncurses: fix for CVE-2025-69720

Pick relevant part of snapshot commit 20251213, see [1].

That has:
add a limit-check in infocmp -i option (report/example by Yixuan Cao).

[1] https://invisible-island.net/ncurses/NEWS.html#index-t20251213

References:
1. https://github.com/Cao-Wuhui/CVE-2025-69720
2. https://nvd.nist.gov/vuln/detail/CVE-2025-69720
3. https://access.redhat.com/errata/RHSA-2026:5913

(From OE-Core rev: a4364099e0593757bc848dc766843d7651550224)

Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Paul Barker <paul@pbarker.dev>

meta/recipes-core/ncurses/files/CVE-2025-69720.patch

@@ -0,0 +1,42 @@
+From 6f6db0e8fd14e40096a0ee6f8bdf32dedbd3fc9e Mon Sep 17 00:00:00 2001
+From: Hitendra Prajapati <hprajapati@mvista.com>
+Date: Mon, 6 Apr 2026 18:08:09 +0530
+Subject: [PATCH] add limit-check in infocmp
+
+origin : https://invisible-island.net/archives/ncurses/6.5/ncurses-6.5-20251213.patch.gz
+Refer: https://github.com/Cao-Wuhui/CVE-2025-69720
+patch by : Thomas E. Dickey <dickey@invisible-island.net>
+
+CVE: CVE-2025-69720
+Upstream-Status: Backport [https://github.com/ThomasDickey/ncurses-snapshots/commit/6f6db0e8fd14e40096a0ee6f8bdf32dedbd3fc9e]
+Signed-off-by: Hitendra Prajapati <hprajapati@mvista.com>
+---
+ progs/infocmp.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/progs/infocmp.c b/progs/infocmp.c
+index 171d794d..2fc1f035 100644
+--- a/progs/infocmp.c
++++ b/progs/infocmp.c
+@@ -816,7 +816,7 @@ lookup_params(const assoc * table, char *dst, char *src)
+ static void
+ analyze_string(const char *name, const char *cap, TERMTYPE2 *tp)
+ {
+-    char buf2[MAX_TERMINFO_LENGTH];
++    char buf2[MAX_TERMINFO_LENGTH + 1];
+     const char *sp;
+     const assoc *ap;
+     int tp_lines = tp->Numbers[2];
+@@ -846,7 +846,8 @@ analyze_string(const char *name, const char *cap, TERMTYPE2 *tp)
+ 	    if (VALID_STRING(cp) &&
+ 		cp[0] != '\0' &&
+ 		cp != cap) {
+-		len = strlen(cp);
++		if ((len = strlen(cp)) > MAX_TERMINFO_LENGTH)
++		    len = MAX_TERMINFO_LENGTH;
+ 		_nc_STRNCPY(buf2, sp, len);
+ 		buf2[len] = '\0';
+ 
+-- 
+2.50.1
+

meta/recipes-core/ncurses/ncurses_6.4.bb

@@ -9,6 +9,7 @@ SRC_URI += "file://0001-tic-hang.patch \
            file://CVE-2023-50495.patch \
            file://CVE-2023-45918.patch \
            file://CVE-2025-6141.patch \
+           file://CVE-2025-69720.patch \
            "
 # commit id corresponds to the revision in package version
 SRCREV = "1003914e200fd622a27237abca155ce6bf2e6030"