ncurses: patch CVE-2025-6141

Pick relevant part of snapshot commit 20250329, see [1].

That has:
add a buffer-limit check in postprocess_termcap (report/testcase by
Yifan Zhang).

[1] https://invisible-island.net/ncurses/NEWS.html#index-t20250329

(From OE-Core rev: 408f1d820616d2bf73cbd319b911885d79d3ca9d)

Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 26 insertions, 0 deletions

diff --git a/meta/recipes-core/ncurses/files/CVE-2025-6141.patch b/meta/recipes-core/ncurses/files/CVE-2025-6141.patch
new file mode 100644
index 0000000000..ec7e8a94e4
--- /dev/null
+++ b/meta/recipes-core/ncurses/files/CVE-2025-6141.patch
@@ -0,0 +1,25 @@
+From 27d1493340d714e7be6e08c0a8f43e48276149c4 Mon Sep 17 00:00:00 2001
+From: "Thomas E. Dickey" <dickey@invisible-island.net>
+Date: Sat, 29 Mar 2025 22:52:37 +0000
+Subject: [PATCH] snapshot of project "ncurses", label v6_5_20250329
+
+CVE: CVE-2025-6141
+Upstream-Status: Backport [https://github.com/ThomasDickey/ncurses-snapshots/commit/27d1493340d714e7be6e08c0a8f43e48276149c4]
+Signed-off-by: Peter Marko <peter.marko@siemens.com>
+---
+ ncurses/tinfo/parse_entry.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/ncurses/tinfo/parse_entry.c b/ncurses/tinfo/parse_entry.c
+index a2278c07..c551c780 100644
+--- a/ncurses/tinfo/parse_entry.c
++++ b/ncurses/tinfo/parse_entry.c
+@@ -985,6 +985,8 @@ postprocess_termcap(TERMTYPE2 *tp, bool has_base)
+            bp = tp->Strings[from_ptr->nte_index];
+            if (VALID_STRING(bp)) {
+                for (dp = buf2; *bp; bp++) {
++                   if ((size_t) (dp - buf2) >= (sizeof(buf2) - sizeof(TERMTYPE2)))
++                         break;
+                    if (bp[0] == '$' && bp[1] == '<') {
+                        while (*bp && *bp != '>') {
+                            ++bp;
diff --git a/meta/recipes-core/ncurses/ncurses_6.5.bb b/meta/recipes-core/ncurses/ncurses_6.5.bb
index 2e3ee337ea..83de792d89 100644
--- a/meta/recipes-core/ncurses/ncurses_6.5.bb
+++ b/meta/recipes-core/ncurses/ncurses_6.5.bb
@@ -4,6 +4,7 @@ SRC_URI += "file://0001-tic-hang.patch \
            file://0002-configure-reproducible.patch \
            file://0003-gen-pkgconfig.in-Do-not-include-LDFLAGS-in-generated.patch \
            file://exit_prototype.patch \
+           file://CVE-2025-6141.patch \
            "
 # commit id corresponds to the revision in package version
 SRCREV = "1c55d64d9d3e00399a21f04e9cac1e472ab5f70a"