[scarthgap][PATCH] libarchive: fix CVE-2026-14164

[<daniel.turull@ericsson.com>]

From: Daniel Turull <daniel.turull@ericsson.com>

Backport patch to fix CVE-2026-14164.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2026-14164

Upstream fix:
  https://github.com/libarchive/libarchive/commit/f774f03b40cb109348e5c6d52b59c864e3cfa8e8

Signed-off-by: Daniel Turull <daniel.turull@ericsson.com>
---
 .../libarchive/CVE-2026-14164.patch           | 52 +++++++++++++++++++
 .../libarchive/libarchive_3.7.9.bb            |  1 +
 2 files changed, 53 insertions(+)
 create mode 100644 meta/recipes-extended/libarchive/libarchive/CVE-2026-14164.patch

diff --git a/meta/recipes-extended/libarchive/libarchive/CVE-2026-14164.patch b/meta/recipes-extended/libarchive/libarchive/CVE-2026-14164.patch
new file mode 100644
index 00000000000..c94764acf29
--- /dev/null
+++ b/meta/recipes-extended/libarchive/libarchive/CVE-2026-14164.patch
@@ -0,0 +1,52 @@
+From 5efdd23ea2569314d62492bdc0b078f4dad1f75a Mon Sep 17 00:00:00 2001
+From: "Dustin L. Howett" <dustin@howett.net>
+Date: Sun, 24 May 2026 12:43:00 -0500
+Subject: [PATCH] Merge pull request #3071 from stoeckmann/rar5_doublefree
+
+rar5: Avoid dangling pointers in init_unpack
+(cherry picked from commit 42453cf16255800726b4efedab25138639ceef20)
+
+Conflicts Resolved:
+
+libarchive/archive_read_support_format_rar5.c (1 conflict):
+- Stable's init_unpack() is a void function without the calloc failure
+  checks (`if(...== NULL) return ARCHIVE_FATAL;`) that exist upstream,
+  since it predates that hardening. Kept the CVE fix logic (unconditionally
+  setting rar->cstate.window_buf and rar->cstate.filtered_buf to NULL right
+  after free(), and removing the redundant else-branch that only NULLed
+  them when window_size <= 0) and omitted the ARCHIVE_FATAL return checks,
+  which don't apply to this void-returning stable version.
+
+Assisted-by: kiro:claude-sonnet-5
+
+Changes from upstream commit f774f03b40cb:
+  - libarchive/archive_read_support_format_rar5.c: adapted from upstream
+
+CVE: CVE-2026-14164
+Upstream-Status: Backport [https://github.com/libarchive/libarchive/commit/f774f03b40cb109348e5c6d52b59c864e3cfa8e8]
+
+Signed-off-by: Daniel Turull <daniel.turull@ericsson.com>
+---
+ libarchive/archive_read_support_format_rar5.c | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/libarchive/archive_read_support_format_rar5.c b/libarchive/archive_read_support_format_rar5.c
+index 736c95a6..098cd6f7 100644
+--- a/libarchive/archive_read_support_format_rar5.c
++++ b/libarchive/archive_read_support_format_rar5.c
+@@ -2489,12 +2489,12 @@ static void init_unpack(struct rar5* rar) {
+ 	free(rar->cstate.window_buf);
+ 	free(rar->cstate.filtered_buf);
+ 
++	rar->cstate.window_buf = NULL;
++	rar->cstate.filtered_buf = NULL;
++
+ 	if(rar->cstate.window_size > 0) {
+ 		rar->cstate.window_buf = calloc(1, rar->cstate.window_size);
+ 		rar->cstate.filtered_buf = calloc(1, rar->cstate.window_size);
+-	} else {
+-		rar->cstate.window_buf = NULL;
+-		rar->cstate.filtered_buf = NULL;
+ 	}
+ 
+ 	clear_data_ready_stack(rar);
diff --git a/meta/recipes-extended/libarchive/libarchive_3.7.9.bb b/meta/recipes-extended/libarchive/libarchive_3.7.9.bb
index c167b164b4b..d08350e2b47 100644
--- a/meta/recipes-extended/libarchive/libarchive_3.7.9.bb
+++ b/meta/recipes-extended/libarchive/libarchive_3.7.9.bb
@@ -49,6 +49,7 @@ SRC_URI = "http://libarchive.org/downloads/libarchive-${PV}.tar.gz \
            file://CVE-2026-4426.patch \
            file://CVE-2026-4424-1.patch \
            file://CVE-2026-4424-2.patch \
+           file://CVE-2026-14164.patch \
            "
 UPSTREAM_CHECK_URI = "http://libarchive.org/"