libssh: Fix CVE-2026-0964

Pick commit according to [1]

[1] https://security-tracker.debian.org/tracker/CVE-2026-0964
[2] https://www.libssh.org/security/advisories/CVE-2026-0964.txt

Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>

meta-oe/recipes-support/libssh/libssh/CVE-2026-0964.patch

@@ -0,0 +1,46 @@
+From a5e4b12090b0c939d85af4f29280e40c5b6600aa Mon Sep 17 00:00:00 2001
+From: Jakub Jelen <jjelen@redhat.com>
+Date: Mon, 22 Dec 2025 19:16:44 +0100
+Subject: [PATCH] CVE-2026-0964 scp: Reject invalid paths received through scp
+
+Signed-off-by: Jakub Jelen <jjelen@redhat.com>
+Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
+(cherry picked from commit daa80818f89347b4d80b0c5b80659f9a9e55e8cc)
+
+Upstream-Status: Backport [https://git.libssh.org/projects/libssh.git/commit/?id=a5e4b12090b0c939d85af4f29280e40c5b6600aa]
+CVE: CVE-2026-0964
+Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
+---
+ src/scp.c | 16 ++++++++++++++++
+ 1 file changed, 16 insertions(+)
+
+diff --git a/src/scp.c b/src/scp.c
+index 652551e3..4590cf79 100644
+--- a/src/scp.c
++++ b/src/scp.c
+@@ -738,6 +738,22 @@ int ssh_scp_pull_request(ssh_scp scp)
+         size = strtoull(tmp, NULL, 10);
+         p++;
+         name = strdup(p);
++	/* Catch invalid name:
++	 *  - empty ones
++	 *  - containing any forward slash -- directory traversal handled
++	 *    differently
++	 *  - special names "." and ".." referring to the current and parent
++	 *    directories -- they are not expected either
++	 */
++	if (name == NULL || name[0] == '\0' || strchr(name, '/') ||
++	    strcmp(name, ".") == 0 || strcmp(name, "..") == 0) {
++	    ssh_set_error(scp->session,
++			  SSH_FATAL,
++			  "Received invalid filename: %s",
++			  name == NULL ? "<NULL>" : name);
++	    SAFE_FREE(name);
++	    goto error;
++	}
+         SAFE_FREE(scp->request_name);
+         scp->request_name = name;
+         if (buffer[0] == 'C') {
+-- 
+2.25.1
+

meta-oe/recipes-support/libssh/libssh_0.8.9.bb

@@ -31,6 +31,7 @@ SRC_URI = "git://git.libssh.org/projects/libssh.git;protocol=https;branch=stable
            file://CVE-2026-3731.patch \
            file://CVE-2026-0966-1.patch \
            file://CVE-2026-0966-2.patch \
+           file://CVE-2026-0964.patch \
           "
 SRCREV = "04685a74df9ce1db1bc116a83a0da78b4f4fa1f8"