From f195e8405070499b069663bfbfa0ed60b2cfcaec Mon Sep 17 00:00:00 2001
From: "Theo Gaige (Schneider Electric)" <tgaige.opensource@witekio.com>
Date: Thu, 21 May 2026 12:09:40 +0200
Subject: [PATCH] go: patch CVE-2026-39819

Backport patch from [1]

[1] https://go.dev/cl/763882

(From OE-Core rev: 791de4922a5b342e3227713b053709a00400e1b5)

Signed-off-by: Theo Gaige (Schneider Electric) <tgaige.opensource@witekio.com>
Reviewed-by: Bruno Vernay <bruno.vernay@se.com>
Signed-off-by: Jeremy Rosen <jeremy.rosen@smile.fr>
Signed-off-by: Paul Barker <paul@pbarker.dev>
---
 meta/recipes-devtools/go/go-1.22.12.inc       |  1 +
 .../go/go/CVE-2026-39819.patch                | 48 +++++++++++++++++++
 2 files changed, 49 insertions(+)
 create mode 100644 meta/recipes-devtools/go/go/CVE-2026-39819.patch

diff --git a/meta/recipes-devtools/go/go-1.22.12.inc b/meta/recipes-devtools/go/go-1.22.12.inc
index f06b974e04..dba826011b 100644
--- a/meta/recipes-devtools/go/go-1.22.12.inc
+++ b/meta/recipes-devtools/go/go-1.22.12.inc
@@ -47,6 +47,7 @@ SRC_URI += "\
     file://CVE-2026-32289.patch \
     file://CVE-2026-33811.patch \
     file://CVE-2026-39817.patch \
+    file://CVE-2026-39819.patch \
 "
 SRC_URI[main.sha256sum] = "012a7e1f37f362c0918c1dfa3334458ac2da1628c4b9cf4d9ca02db986e17d71"
 
diff --git a/meta/recipes-devtools/go/go/CVE-2026-39819.patch b/meta/recipes-devtools/go/go/CVE-2026-39819.patch
new file mode 100644
index 0000000000..cb767e1320
--- /dev/null
+++ b/meta/recipes-devtools/go/go/CVE-2026-39819.patch
@@ -0,0 +1,48 @@
+From db6ceacb046779c763f87060d8a1ba5c936309c9 Mon Sep 17 00:00:00 2001
+From: Damien Neil <dneil@google.com>
+Date: Wed, 8 Apr 2026 09:55:54 -0700
+Subject: [PATCH] cmd/go: use MkdirTemp to create temp directory for "go bug"
+
+Don't use a predictable, potentially attacker-controlled filename in /tmp.
+
+Fixes #78584
+Fixes CVE-2026-39819
+
+Change-Id: I72116aa6dd8fa50f65b6dc0292a15a8c6a6a6964
+Reviewed-on: https://go-review.googlesource.com/c/go/+/763882
+Reviewed-by: Nicholas Husin <husin@google.com>
+Reviewed-by: Nicholas Husin <nsh@golang.org>
+LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
+
+CVE: CVE-2026-39819
+Upstream-Status: Backport [https://github.com/golang/go/commit/5d6aa23e5b6151d25955a512532383c28c745e18]
+Signed-off-by: Theo Gaige (Schneider Electric) <tgaige.opensource@witekio.com>
+---
+ src/cmd/go/internal/bug/bug.go | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/src/cmd/go/internal/bug/bug.go b/src/cmd/go/internal/bug/bug.go
+index ed1813605e..9bf97dd511 100644
+--- a/src/cmd/go/internal/bug/bug.go
++++ b/src/cmd/go/internal/bug/bug.go
+@@ -182,14 +182,14 @@ func firstLine(buf []byte) []byte {
+ // printGlibcVersion prints information about the glibc version.
+ // It ignores failures.
+ func printGlibcVersion(w io.Writer) {
+-	tempdir := os.TempDir()
+-	if tempdir == "" {
++	tempdir, err := os.MkdirTemp("", "")
++	if err != nil {
+ 		return
+ 	}
+ 	src := []byte(`int main() {}`)
+ 	srcfile := filepath.Join(tempdir, "go-bug.c")
+ 	outfile := filepath.Join(tempdir, "go-bug")
+-	err := os.WriteFile(srcfile, src, 0644)
++	err = os.WriteFile(srcfile, src, 0644)
+ 	if err != nil {
+ 		return
+ 	}
+-- 
+2.43.0
+