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

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

[daniel.turull]

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

Tested with ptest:
Before: PASSED: 5, FAILED: 0, SKIPPED: 0
After: PASSED: 5, FAILED: 0, SKIPPED: 0

Signed-off-by: Daniel Turull <daniel.turull@ericsson.com>
---
 .../libarchive/CVE-2026-14164.patch           | 53 +++++++++++++++++++
 .../libarchive/libarchive_3.8.7.bb            |  1 +
 2 files changed, 54 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 0000000000..b734fc448f
--- /dev/null
+++ b/meta/recipes-extended/libarchive/libarchive/CVE-2026-14164.patch
@@ -0,0 +1,53 @@
+From edbac77e8e544286fe7581bc398781c949ee5a22 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):
+- The stable branch's init_unpack() already unconditionally NULLs
+  rar->cstate.window_buf and rar->cstate.filtered_buf right after free()
+  (the core CVE fix), but still retained the redundant else-branch that
+  re-NULLed them when window_size <= 0. Removed that dead else-branch to
+  match the upstream fix, and omitted upstream's added
+  `if(...== NULL) return ARCHIVE_FATAL;` calloc failure checks, since
+  init_unpack() is void-returning in this stable version and predates
+  that hardening.
+
+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 63dd97b3..271aa0cb 100644
+--- a/libarchive/archive_read_support_format_rar5.c
++++ b/libarchive/archive_read_support_format_rar5.c
+@@ -2568,12 +2568,12 @@ 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_3.8.7.bb b/meta/recipes-extended/libarchive/libarchive_3.8.7.bb
index e8c3a3bfe3..ecb13a6772 100644
--- a/meta/recipes-extended/libarchive/libarchive_3.8.7.bb
+++ b/meta/recipes-extended/libarchive/libarchive_3.8.7.bb
@@ -31,6 +31,7 @@ EXTRA_OECONF += "--enable-largefile --without-iconv"
 
 SRC_URI = "https://libarchive.org/downloads/libarchive-${PV}.tar.gz \
            file://run-ptest \
+           file://CVE-2026-14164.patch \
           "
 UPSTREAM_CHECK_URI = "https://www.libarchive.org/"