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libgphoto2: patch CVE-2026-40335

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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>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>
This commit is contained in:
Gyorgy Sarvari
2026-04-20 08:27:43 +02:00
committed by Khem Raj
parent ce3fa8ad2a
commit f735ea20b1
2 changed files with 44 additions and 0 deletions
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meta-oe/recipes-graphics/gphoto2/libgphoto2/CVE-2026-40335.patch
+43
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@@ -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;
meta-oe/recipes-graphics/gphoto2/libgphoto2_2.5.33.bb
+1
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@@ -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"