CVE-2026-120452

medium

Description

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.

References

https://www.vulncheck.com/advisories/libgphoto2-through-2.5.34-heap-out-of-bounds-read-write-via-jl2005c-thumbnail-conversion

https://hackmd.io/@haindpwn/libgphoto2-jl2005c-init-alloc-table-buffer-overflow

https://github.com/gphoto/libgphoto2/issues/1326

https://github.com/gphoto/libgphoto2/commit/af3b8e9c542cda863fb5f2f3cfeb261bd78e4442

https://github.com/gphoto/libgphoto2/commit/30bf7ace6d47cfe1232ea73bde2aceb95aba4bfb

https://github.com/gphoto/libgphoto2/blob/v2.5.34/camlibs/jl2005c/jl2005bcd_decompress.c#L127-L130

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-115212

Details

Source: Mitre, NVD

Published: 2026-11-02

Updated: 2026-11-02

Risk Information

CVSS v2

Base Score: 6.1

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:C

Severity: Medium

CVSS v3

Base Score: 5.4

Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

Severity: Medium

CVSS v4

Base Score: 5.2

Vector: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00185