[meta-oe][wrynose][PATCH] jq: fix CVE-2026-39956

From: Tugrul Kukul <[email protected]>

Backport patch to fix CVE-2026-39956.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2026-39956
  https://www.cve.org/CVERecord?id=CVE-2026-39956
  https://security-tracker.debian.org/tracker/CVE-2026-39956
  https://osv.dev/list?q=CVE-2026-39956

Upstream fix:
  https://github.com/jqlang/jq/commit/fdf8ef0f0810e3d365cdd5160de43db46f57ed03 [nvd]

Tested with ptest:
Before: PASSED: 7, FAILED: 0, SKIPPED: 0
After: PASSED: 7, FAILED: 0, SKIPPED: 0

Signed-off-by: Tugrul Kukul <[email protected]>
---
 .../jq/jq/CVE-2026-39956.patch                | 50 +++++++++++++++++++
 meta-oe/recipes-devtools/jq/jq_1.8.1.bb       |  1 +
 2 files changed, 51 insertions(+)
 create mode 100644 meta-oe/recipes-devtools/jq/jq/CVE-2026-39956.patch

diff --git a/meta-oe/recipes-devtools/jq/jq/CVE-2026-39956.patch b/meta-oe/recipes-devtools/jq/jq/CVE-2026-39956.patch
new file mode 100644
index 0000000000..da41b1168f
--- /dev/null
+++ b/meta-oe/recipes-devtools/jq/jq/CVE-2026-39956.patch
@@ -0,0 +1,50 @@
+From 8e7a4a3c01da36e0b9509b0e93a005649318e0f7 Mon Sep 17 00:00:00 2001
+From: tlsbollei <[email protected]>
+Date: Wed, 8 Apr 2026 21:43:46 +0200
+Subject: [PATCH] Add runtime type checks to f_string_indexes
+
+This fixes CVE-2026-39956.
+---
+ src/builtin.c | 8 ++++++++
+ tests/jq.test | 9 +++++++++
+ 2 files changed, 17 insertions(+)
+
+diff --git a/src/builtin.c b/src/builtin.c
+index 52fe77c..ac56f9f 100644
+--- a/src/builtin.c
++++ b/src/builtin.c
+@@ -1286,6 +1286,14 @@ static jv f_string_explode(jq_state *jq, jv a) {
+ }
+ 
+ static jv f_string_indexes(jq_state *jq, jv a, jv b) {
++  if (jv_get_kind(a) != JV_KIND_STRING) {
++    jv_free(b);
++    return type_error(a, "cannot be searched, as it is not a string");
++  }
++  if (jv_get_kind(b) != JV_KIND_STRING) {
++    jv_free(a);
++    return type_error(b, "is not a string");
++  }
+   return jv_string_indexes(a, b);
+ }
+ 
+diff --git a/tests/jq.test b/tests/jq.test
+index 4ecf72f..07aa0cf 100644
+--- a/tests/jq.test
++++ b/tests/jq.test
+@@ -1520,6 +1520,15 @@ split("")
+ "xababababax"
+ [1,7,[1,3,5,7]]
+ 
++# _strindices is used by indices/1 but is callable
++try _strindices("abc") catch .
++123
++"number (123) cannot be searched, as it is not a string"
++
++try _strindices(123) catch .
++"abc"
++"number (123) is not a string"
++
+ # trim
+ # \u000b is vertical tab (\v not supported by json)
+ map(trim), map(ltrim), map(rtrim)
diff --git a/meta-oe/recipes-devtools/jq/jq_1.8.1.bb b/meta-oe/recipes-devtools/jq/jq_1.8.1.bb
index b213e21c57..5d2a1be398 100644
--- a/meta-oe/recipes-devtools/jq/jq_1.8.1.bb
+++ b/meta-oe/recipes-devtools/jq/jq_1.8.1.bb
@@ -27,6 +27,7 @@ SRC_URI = "git://github.com/jqlang/jq.git;protocol=https;branch=master;tag=jq-${
            file://CVE-2026-43895.patch \
            file://CVE-2026-49839.patch \
            file://CVE-2026-54679.patch \
+           file://CVE-2026-39956.patch \
            "
 
 inherit autotools ptest