libgphoto2: patch CVE-2026-40339

Details: https://nvd.nist.gov/vuln/detail/CVE-2026-40339

Backport the patch referenced by the NVD advisory.

Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

2 files changed, 42 insertions, 0 deletions

diff --git a/meta-oe/recipes-graphics/gphoto2/libgphoto2/CVE-2026-40339.patch b/meta-oe/recipes-graphics/gphoto2/libgphoto2/CVE-2026-40339.patch
new file mode 100644
index 0000000000..b00ac72772
--- /dev/null
+++ b/meta-oe/recipes-graphics/gphoto2/libgphoto2/CVE-2026-40339.patch
@@ -0,0 +1,41 @@
+From 585e8113b541469347d09c341c2e8b468b431adb Mon Sep 17 00:00:00 2001
+From: Marcus Meissner <marcus@jet.franken.de>
+Date: Sat, 11 Apr 2026 10:50:47 +0200
+Subject: [PATCH] =?UTF-8?q?Fixed=20Sony=20DPD=20FormFlag=20OOB=20Read=20(C?=
+ =?UTF-8?q?WE-125)=20=E2=80=94=20MEDIUM?=
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+ptp_unpack_Sony_DPD() reads the FormFlag byte via dtoh8o(data, *poffset)
+without a prior bounds check. The standard ptp_unpack_DPD() at line
+686–687 correctly validates *offset + sizeof(uint8_t) > dpdlen before
+this same read, but the Sony variant omits this check.
+
+CVE-2026-40339
+
+Reported-By: Sebastián Alba <sebasjosue84@gmail.com>
+
+CVE: CVE-2026-40339
+Upstream-Status: Backport [https://github.com/gphoto/libgphoto2/commit/09f8a940b1e418b5693f5c11e3016a1ad2cea62d]
+Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
+---
+ camlibs/ptp2/ptp-pack.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/camlibs/ptp2/ptp-pack.c b/camlibs/ptp2/ptp-pack.c
+index f90d2a5..28648a5 100644
+--- a/camlibs/ptp2/ptp-pack.c
++++ b/camlibs/ptp2/ptp-pack.c
+@@ -833,9 +833,10 @@ ptp_unpack_Sony_DPD (PTPParams *params, const unsigned char* data, PTPDeviceProp
+           code or the Data Type is a string (with two empty strings as
+           values). In both cases Form Flag should be set to 0x00 and FORM is
+           not present. */
+-
+        if (*poffset==PTP_dpd_Sony_DefaultValue)
+                return 1;
++       if (*poffset + sizeof(uint8_t) > dpdlen)
++               return 1;
+ 
+        dpd->FormFlag = dtoh8o(data, *poffset);
+        ptp_debug (params, "formflag 0x%04x", dpd->FormFlag);
diff --git a/meta-oe/recipes-graphics/gphoto2/libgphoto2_2.5.33.bb b/meta-oe/recipes-graphics/gphoto2/libgphoto2_2.5.33.bb
index df23932535..be761bc940 100644
--- a/meta-oe/recipes-graphics/gphoto2/libgphoto2_2.5.33.bb
+++ b/meta-oe/recipes-graphics/gphoto2/libgphoto2_2.5.33.bb
@@ -18,6 +18,7 @@ SRC_URI = "${SOURCEFORGE_MIRROR}/gphoto/${BP}.tar.xz;name=libgphoto2 \
            file://CVE-2026-40335.patch \
            file://CVE-2026-40336.patch \
            file://CVE-2026-40338.patch \
+           file://CVE-2026-40339.patch \
            "
 SRC_URI[libgphoto2.sha256sum] = "28825f767a85544cb58f6e15028f8e53a5bb37a62148b3f1708b524781c3bef2"