{"id":"CVE-2026-120452","title":"libgphoto2 through 2.5.34 Heap Out-of-Bounds Read/Write via jl2005c Thumbnail Conversion","summary":"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 alloca…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","cvssSource":"cna","cwe":["CWE-787"],"vendor":"gPhoto","product":"libgphoto2","affected":["libgphoto2 <= 2.5.34"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-02T17:04:36.935838Z"},"published":"2026-11-02","updated":"2026-11-02","sourceUpdated":"2026-11-02T17:32:13.589Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-120452","references":[{"url":"https://github.com/gphoto/libgphoto2/issues/1326"},{"url":"https://github.com/gphoto/libgphoto2/commit/af3b8e9c542cda863fb5f2f3cfeb261bd78e4442"},{"url":"https://github.com/gphoto/libgphoto2/commit/30bf7ace6d47cfe1232ea73bde2aceb95aba4bfb"},{"url":"https://github.com/gphoto/libgphoto2/blob/v2.5.34/camlibs/jl2005c/jl2005bcd_decompress.c#L127-L130"},{"url":"https://hackmd.io/@haindpwn/libgphoto2-jl2005c-init-alloc-table-buffer-overflow"},{"url":"https://www.vulncheck.com/advisories/libgphoto2-through-2.5.34-heap-out-of-bounds-read-write-via-jl2005c-thumbnail-conversion","label":"VulnCheck Advisory: libgphoto2 through 2.5.34 Heap Out-of-Bounds Read/Write via jl2005c Thumbnail Conversion"}],"tags":["cve.org"],"epss":0.00185,"epssPercentile":0.08133,"ingestedAt":"2026-11-05T19:30:42.731Z","slug":"CVE-2026-120452","body":"## Overview\n\nlibgphoto2 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.\n\n## Affected\n\n- `libgphoto2 <= 2.5.34`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}