[OE-core][scarthgap][PATCH 2/8] openssh: Fix CVE-2026-59997

["Devansh Patel -X (devanshp - E INFOCHIPS PRIVATE LIMITED at Cisco)" <devanshp@cisco.com>]

From: Devansh Patel <devanshp@cisco.com>

This patch applies the upstream OpenSSH 10.4 backport for
CVE-2026-59997. The upstream fix commit is referenced in [1],
and the public CVE advisory is referenced in [2].

[1] https://github.com/openssh/openssh-portable/commit/e9916c44c1324ab9ab022719e4df08a390a83014
[2] https://nvd.nist.gov/vuln/detail/CVE-2026-59997

Signed-off-by: Devansh Patel <devanshp@cisco.com>
---
 .../openssh/openssh/CVE-2026-59997.patch      | 58 +++++++++++++++++++
 .../openssh/openssh_9.6p1.bb                  |  1 +
 2 files changed, 59 insertions(+)
 create mode 100644 meta/recipes-connectivity/openssh/openssh/CVE-2026-59997.patch

diff --git a/meta/recipes-connectivity/openssh/openssh/CVE-2026-59997.patch b/meta/recipes-connectivity/openssh/openssh/CVE-2026-59997.patch
new file mode 100644
index 0000000000..aa171def01
--- /dev/null
+++ b/meta/recipes-connectivity/openssh/openssh/CVE-2026-59997.patch
@@ -0,0 +1,58 @@
+From 3011cbb6bb73f3f3dc90fa1d48736803fa407509 Mon Sep 17 00:00:00 2001
+From: "djm@openbsd.org" <djm@openbsd.org>
+Date: Fri, 5 Jun 2026 08:53:07 +0000
+Subject: [PATCH] upstream: pass >9 commandline arguments to the internal-sftp
+ server,
+
+previously they were silently dropped; reported by Steve Caffrey ok deraadt@
+
+CVE: CVE-2026-59997
+Upstream-Status: Backport [https://github.com/openssh/openssh-portable/commit/e9916c44c1324ab9ab022719e4df08a390a83014]
+
+Backport Changes:
+- Retained the Scarthgap session.c OpenBSD revision identifier because the
+  10.4 identifier does not describe the older source baseline.
+
+OpenBSD-Commit-ID: ee6cd5430a3ca027c3223af54b58ad3cc7ccd624
+(cherry picked from commit e9916c44c1324ab9ab022719e4df08a390a83014)
+Signed-off-by: Devansh Patel <devanshp@cisco.com>
+---
+ session.c | 19 ++++++++++---------
+ 1 file changed, 10 insertions(+), 9 deletions(-)
+
+diff --git a/session.c b/session.c
+index eb932b8bf..1a01ecf74 100644
+--- a/session.c
++++ b/session.c
+@@ -1650,21 +1650,22 @@ do_child(struct ssh *ssh, Session *s, const char *command)
+ 		exit(1);
+ 	} else if (s->is_subsystem == SUBSYSTEM_INT_SFTP) {
+ 		extern int optind, optreset;
+-		int i;
+-		char *p, *args;
++		int sftp_argc;
++		char **sftp_argv;
+ 
+ 		setproctitle("%s@%s", s->pw->pw_name, INTERNAL_SFTP_NAME);
+-		args = xstrdup(command ? command : "sftp-server");
+-		for (i = 0, (p = strtok(args, " ")); p; (p = strtok(NULL, " ")))
+-			if (i < ARGV_MAX - 1)
+-				argv[i++] = p;
+-		argv[i] = NULL;
++		if (argv_split(command == NULL ? "sftp-server" : command,
++		    &sftp_argc, &sftp_argv, 1) != 0) {
++			error("internal error: can't split internal-sftp "
++			    "arguments");
++			exit(1);
++		}
+ 		optind = optreset = 1;
+-		__progname = argv[0];
++		__progname = sftp_argv[0];
+ #ifdef WITH_SELINUX
+ 		ssh_selinux_change_context("sftpd_t");
+ #endif
+-		exit(sftp_server_main(i, argv, s->pw));
++		exit(sftp_server_main(sftp_argc, sftp_argv, s->pw));
+ 	}
+ 
+ 	fflush(NULL);
diff --git a/meta/recipes-connectivity/openssh/openssh_9.6p1.bb b/meta/recipes-connectivity/openssh/openssh_9.6p1.bb
index efb89d45d7..3c706b00ae 100644
--- a/meta/recipes-connectivity/openssh/openssh_9.6p1.bb
+++ b/meta/recipes-connectivity/openssh/openssh_9.6p1.bb
@@ -38,6 +38,7 @@ SRC_URI = "http://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-${PV}.tar
            file://CVE-2026-35414-CVE-2026-35387.patch \
            file://CVE-2026-35388.patch \
            file://CVE-2026-59999.patch \
+           file://CVE-2026-59997.patch \
            "
 SRC_URI[sha256sum] = "910211c07255a8c5ad654391b40ee59800710dd8119dd5362de09385aa7a777c"
 
-- 
2.44.4