Buffer overflow in Gphoto Libgphoto2
CVE-2026-120451
libgphoto2 through 2.5.34 contains stack-based and heap-based buffer overflow vulnerabilities in jl2005c_init() that allow malicious USB devices to corrupt memory by supplying an unbounded allocation table entry count. Attackers can connect a spoofed Jeilin JL2005B/C/D camera reporting 1022 or more entries to overwrite the saved return address and heap data, potentially achieving code execution.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/gphoto/libgphoto2/issues/1326 (issue-tracking)
- github.com/gphoto/libgphoto2/commit/af3b8e9c542cda863fb5f2f3cfeb261bd78e4442 (patch)
- github.com/gphoto/libgphoto2/commit/6a3393dd996502457ab965432cf0b2035278825e (patch)
- github.com/gphoto/libgphoto2/blob/v2.5.34/camlibs/jl2005c/jl2005c.c (technical-description)
- hackmd.io/@haindpwn/libgphoto2-jl2005c-init-alloc-table-buffer-overflow (technical-description)
- www.vulncheck.com/advisories/libgphoto2-through-2.5.34-buffer-overflow-via-jl20… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-120451?
- CVE-2026-120451 is a medium-severity vulnerability in Gphoto Libgphoto2, classified under Out-of-bounds Write. CVSS score: 6.8/10. Published 2026-11-02.
- How severe is CVE-2026-120451?
- Medium severity. CVSS v3 base score is 6.8 out of 10.