Vulnerability-Lookup

GHSA-4CVW-QWJ9-XJC2

Vulnerability from github – Published: 2026-11-02 15:31 – Updated: 2026-11-02 15:31

Details

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.

Severity

5.4 (Medium)


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

5.2 (Medium)


                  
                    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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-120452"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-11-02T15:17:28Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-4cvw-qwj9-xjc2",
  "modified": "2026-11-02T15:31:43Z",
  "published": "2026-11-02T15:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-120452"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gphoto/libgphoto2/issues/1326"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gphoto/libgphoto2/commit/30bf7ace6d47cfe1232ea73bde2aceb95aba4bfb"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gphoto/libgphoto2/commit/af3b8e9c542cda863fb5f2f3cfeb261bd78e4442"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gphoto/libgphoto2/blob/v2.5.34/camlibs/jl2005c/jl2005bcd_decompress.c#L127-L130"
    },
    {
      "type": "WEB",
      "url": "https://hackmd.io/@haindpwn/libgphoto2-jl2005c-init-alloc-table-buffer-overflow"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/libgphoto2-through-2.5.34-heap-out-of-bounds-read-write-via-jl2005c-thumbnail-conversion"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-120452 (GCVE-0-2026-120452)

Vulnerability from cvelistv5 – Published: 2026-11-02 14:29 – Updated: 2026-11-02 17:32

Title

libgphoto2 through 2.5.34 Heap Out-of-Bounds Read/Write via jl2005c Thumbnail Conversion

Summary

Severity

5.2 (Medium)


                        
                          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

5.4 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-02 17:04 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 7433 records in the last 180 days details

References

6 references

URL	Tags
https://github.com/gphoto/libgphoto2/issues/1326	issue-tracking
https://github.com/gphoto/libgphoto2/commit/af3b8…	patch
https://github.com/gphoto/libgphoto2/commit/30bf7…	patch
https://github.com/gphoto/libgphoto2/blob/v2.5.34…	technical-description
https://hackmd.io/@haindpwn/libgphoto2-jl2005c-in…	technical-description
https://www.vulncheck.com/advisories/libgphoto2-t…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
gPhoto	libgphoto2	Affected: 0 , ≤ 2.5.34 (semver)

Date Public

2026-10-22 00:00

Credits

HaiND from the Post and Telecommunication Institute of Technology TheProtagonist07

Show details on NVD website

JSON

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  "containers": {
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        "metrics": [
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                "id": "CVE-2026-120452",
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-02T17:04:36.935838Z",
                "version": "2.0.3"
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          "shortName": "CISA-ADP"
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    "cna": {
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          "repo": "https://github.com/gphoto/libgphoto2",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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