CVE-2026-120452
libgphoto2 through 2.5.34 Heap Out-of-Bounds Read/Write via jl2005c Thumbnail Conversion
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
libgphoto2 through 2.5.34 contains a heap out-of-bounds read and write vulnerability in jl2005bcd_decompress() that allows malicious USB cameras to corrupt heap memory via oversized thumbnail processing. Attackers can supply small allocation-table values and a thumbnail header byte so in-place byte-swapping exceeds the buffer by about 30 KB, leaking heap contents in preview images.
| CWE | CWE-787 |
| Vendor | gphoto |
| Product | libgphoto2 |
| Published | Nov 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H Attack Vector
Physical
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High
Affected Versions
gPhoto / libgphoto2
0 ≤ 2.5.34
References
github.com: https://github.com/gphoto/libgphoto2/issues/1326 github.com: https://github.com/gphoto/libgphoto2/commit/af3b8e9c542cda863fb5f2f3cfeb261bd78e4442 github.com: https://github.com/gphoto/libgphoto2/commit/30bf7ace6d47cfe1232ea73bde2aceb95aba4bfb github.com: https://github.com/gphoto/libgphoto2/blob/v2.5.34/camlibs/jl2005c/jl2005bcd_decompress.c#L127-L130 hackmd.io: https://hackmd.io/@haindpwn/libgphoto2-jl2005c-init-alloc-table-buffer-overflow vulncheck.com: https://www.vulncheck.com/advisories/libgphoto2-through-2.5.34-heap-out-of-bounds-read-write-via-jl2005c-thumbnail-conversion
Credits
HaiND from the Post and Telecommunication Institute of Technology TheProtagonist07