diff mbox series

[meta-oe,11/17] libgphoto2: patch CVE-2026-40335

Message ID 20260420062750.3795917-11-skandigraun@gmail.com
State Accepted
Headers show
Series [meta-oe,01/17] fio: upgrade 3.41 -> 3.42 | expand

Commit Message

Gyorgy Sarvari April 20, 2026, 6:27 a.m. UTC 
Details: https://nvd.nist.gov/vuln/detail/CVE-2026-40335

Backport the patch that is referenced by the NVD advisory.

Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
---
 .../gphoto2/libgphoto2/CVE-2026-40335.patch   | 43 +++++++++++++++++++
 .../gphoto2/libgphoto2_2.5.33.bb              |  1 +
 2 files changed, 44 insertions(+)
 create mode 100644 meta-oe/recipes-graphics/gphoto2/libgphoto2/CVE-2026-40335.patch
diff mbox series

Patch

diff --git a/meta-oe/recipes-graphics/gphoto2/libgphoto2/CVE-2026-40335.patch b/meta-oe/recipes-graphics/gphoto2/libgphoto2/CVE-2026-40335.patch
new file mode 100644
index 0000000000..dfe832e6c8
--- /dev/null
+++ b/meta-oe/recipes-graphics/gphoto2/libgphoto2/CVE-2026-40335.patch
@@ -0,0 +1,43 @@ 
+From edcdf804662eb4340fdc371af4853d6579e969ab Mon Sep 17 00:00:00 2001
+From: Marcus Meissner <marcus@jet.franken.de>
+Date: Wed, 8 Apr 2026 15:07:38 +0200
+Subject: [PATCH] =?UTF-8?q?Fixed=20UINT128/INT128=20Unchecked=20Offset=20A?=
+ =?UTF-8?q?dvance=20(CWE-125)=20=E2=80=94=20MEDIUM?=
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Finding 5: UINT128/INT128 Unchecked Offset Advance (CWE-125) — MEDIUM
+
+In ptp_unpack_DPV(), the PTP_DTC_UINT128 and PTP_DTC_INT128 cases advance *offset += 16 without verifying 16 bytes remain. The entry check at line 609 only guarantees *offset < total (at least 1 byte available). After the unchecked advance, *offset can exceed total, and the CTVAL macro's bounds check (total - *offset < sizeof(target)) wraps due to unsigned arithmetic.
+
+CVE-2026-40335
+
+Reported-By: Sebastián Alba <sebasjosue84@gmail.com>
+
+CVE: CVE-2026-40335
+Upstream-Status: Backport [https://github.com/gphoto/libgphoto2/commit/433bde9888d70aa726e32744cd751d7dbe94379a]
+Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
+---
+ camlibs/ptp2/ptp-pack.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/camlibs/ptp2/ptp-pack.c b/camlibs/ptp2/ptp-pack.c
+index 982b4f4..7fc120d 100644
+--- a/camlibs/ptp2/ptp-pack.c
++++ b/camlibs/ptp2/ptp-pack.c
+@@ -614,10 +614,14 @@ ptp_unpack_DPV (
+ 	case PTP_DTC_UINT64: CTVAL(value->u64,dtoh64a); break;
+ 
+ 	case PTP_DTC_UINT128:
++		if (total - *offset < 16)
++			return 0;
+ 		*offset += 16;
+ 		/*fprintf(stderr,"unhandled unpack of uint128n");*/
+ 		break;
+ 	case PTP_DTC_INT128:
++		if (total - *offset < 16)
++			return 0;
+ 		*offset += 16;
+ 		/*fprintf(stderr,"unhandled unpack of int128n");*/
+ 		break;
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 e8e56171a1..269731731b 100644
--- a/meta-oe/recipes-graphics/gphoto2/libgphoto2_2.5.33.bb
+++ b/meta-oe/recipes-graphics/gphoto2/libgphoto2_2.5.33.bb
@@ -15,6 +15,7 @@  SRC_URI = "${SOURCEFORGE_MIRROR}/gphoto/${BP}.tar.xz;name=libgphoto2 \
            file://0001-libgphoto2-fix-const-correctness-for-c23-builds.patch \
            file://CVE-2026-40333.patch \
            file://CVE-2026-40334.patch \
+           file://CVE-2026-40335.patch \
            "
 SRC_URI[libgphoto2.sha256sum] = "28825f767a85544cb58f6e15028f8e53a5bb37a62148b3f1708b524781c3bef2"