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CVE-2026-40339— libgphoto2 has OOB read in ptp_unpack_Sony_DPD() FormFlag parsing in ptp-pack.c

CVSS 5.2 · Medium EPSS 0.01% · P1
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I. Basic Information for CVE-2026-40339

Vulnerability Information
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Vulnerability Title
libgphoto2 has OOB read in ptp_unpack_Sony_DPD() FormFlag parsing in ptp-pack.c
Source: NVD (National Vulnerability Database)
Vulnerability Description
libgphoto2 is a camera access and control library. Versions up to and including 2.5.33 have an out-of-bounds read in `ptp_unpack_Sony_DPD()` in `camlibs/ptp2/ptp-pack.c` (line 842). The function reads the FormFlag byte via `dtoh8o(data, *poffset)` without a prior bounds check. The standard `ptp_unpack_DPD()` at lines 686–687 correctly validates `*offset + sizeof(uint8_t) > dpdlen` before this same read, but the Sony variant omits this check entirely. Commit 09f8a940b1e418b5693f5c11e3016a1ad2cea62d fixes the issue.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存读
Source: NVD (National Vulnerability Database)
Vulnerability Title
libgphoto2 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libgphoto2是gPhoto开源的一个数码相机访问与控制库。 libgphoto2 2.5.33及之前版本存在安全漏洞，该漏洞源于camlibs/ptp2/ptp-pack.c文件中ptp_unpack_Sony_DPD函数读取FormFlag字节前缺少边界检查，可能导致越界读取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
gphotolibgphoto2 <= 2.5.33 -

II. Public POCs for CVE-2026-40339

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III. Intelligence Information for CVE-2026-40339

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Same Patch Batch · gphoto · 2026-04-17 · 8 CVEs total

CVE-2026-403406.1 MEDIUMlibgphoto2 has OOB read in ptp_unpack_OI() in ptp-pack.c via malicious PTP ObjectInfo resp
CVE-2026-403336.1 MEDIUMlibgphoto2 has OOB read in ptp_unpack_EOS_ImageFormat() and ptp_unpack_EOS_CustomFuncEx()
CVE-2026-403385.2 MEDIUMlibgphoto2 has OOB read in ptp_unpack_Sony_DPD() enumeration count parsing in ptp-pack.c
CVE-2026-403355.2 MEDIUMlibgphoto2 has OOB read in ptp_unpack_DPV() UINT128/INT128 handling in ptp-pack.c
CVE-2026-403343.5 LOWlibgphoto2 missing null termination in ptp_unpack_Canon_FE() filename buffer in ptp-pack.c
CVE-2026-403413.5 LOWlibgphoto2 has an OOB Read in ptp_unpack_EOS_FocusInfoEx
CVE-2026-403362.4 LOWlibgphoto2 has memory leak in ptp_unpack_Sony_DPD() secondary enumeration list in ptp-pack

IV. Related Vulnerabilities

Same product: libgphoto2
Same vendor: gphoto
Same weakness: CWE-125

V. Comments for CVE-2026-40339

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