[OE-core][scarthgap][PATCH 3/8] openssh: Fix CVE-2026-59998

["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-2026-59998. 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/8058c5bdb507591b79ec926221fbe6fcc296d432
[2] https://nvd.nist.gov/vuln/detail/CVE-2026-59998

Signed-off-by: Devansh Patel <devanshp@cisco.com>
---
 .../openssh/openssh/CVE-2026-59998.patch      | 34 +++++++++++++++++++
 .../openssh/openssh_9.6p1.bb                  |  1 +
 2 files changed, 35 insertions(+)
 create mode 100644 meta/recipes-connectivity/openssh/openssh/CVE-2026-59998.patch

diff --git a/meta/recipes-connectivity/openssh/openssh/CVE-2026-59998.patch b/meta/recipes-connectivity/openssh/openssh/CVE-2026-59998.patch
new file mode 100644
index 0000000000..a9a13aa70e
--- /dev/null
+++ b/meta/recipes-connectivity/openssh/openssh/CVE-2026-59998.patch
@@ -0,0 +1,34 @@
+From f1fd8585548735bcba25faa13073aafb5f8686ca Mon Sep 17 00:00:00 2001
+From: "djm@openbsd.org" <djm@openbsd.org>
+Date: Wed, 24 Jun 2026 06:55:12 +0000
+Subject: [PATCH] upstream: mention a caveat regarding
+ GSSAPIStrictAcceptorCheck in
+
+some environments
+
+CVE: CVE-2026-59998
+Upstream-Status: Backport [https://github.com/openssh/openssh-portable/commit/8058c5bdb507591b79ec926221fbe6fcc296d432]
+
+Backport Changes:
+- Retained the Scarthgap sshd_config.5 OpenBSD revision identifier and
+  Mdocdate because the 10.4 values do not describe the older manual page.
+
+OpenBSD-Commit-ID: aa7158d8f22cb34063c1c2d3cbcf30a9489847c2
+(cherry picked from commit 8058c5bdb507591b79ec926221fbe6fcc296d432)
+Signed-off-by: Devansh Patel <devanshp@cisco.com>
+---
+ sshd_config.5 | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/sshd_config.5 b/sshd_config.5
+index 7e1a56cd0..e1c8dcaa2 100644
+--- a/sshd_config.5
++++ b/sshd_config.5
+@@ -745,6 +745,7 @@ machine's default store.
+ This facility is provided to assist with operation on multi homed machines.
+ The default is
+ .Cm yes .
++This option may not be effective in Windows Active Directory environments.
+ .It Cm HostbasedAcceptedAlgorithms
+ Specifies the signature algorithms that will be accepted for hostbased
+ authentication as a list of comma-separated patterns.
diff --git a/meta/recipes-connectivity/openssh/openssh_9.6p1.bb b/meta/recipes-connectivity/openssh/openssh_9.6p1.bb
index 3c706b00ae..256d90e7bd 100644
--- a/meta/recipes-connectivity/openssh/openssh_9.6p1.bb
+++ b/meta/recipes-connectivity/openssh/openssh_9.6p1.bb
@@ -39,6 +39,7 @@ SRC_URI = "http://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-${PV}.tar
            file://CVE-2026-35388.patch \
            file://CVE-2026-59999.patch \
            file://CVE-2026-59997.patch \
+           file://CVE-2026-59998.patch \
            "
 SRC_URI[sha256sum] = "910211c07255a8c5ad654391b40ee59800710dd8119dd5362de09385aa7a777c"
 
-- 
2.44.4