Bug 2459356 (CVE-2026-40334)

Summary: CVE-2026-40334 libgphoto2: libgphoto2: Information disclosure and denial of service via missing null terminator
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: low    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in libgphoto2, a camera access and control library. A missing null terminator in the `ptp_unpack_Canon_FE()` function, when processing a specially crafted 13-byte filename, can lead to an out-of-bounds read. This vulnerability may allow a local attacker with physical access to cause information disclosure or a denial of service (DoS).
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Bug Depends On: 2459730    
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Description OSIDB Bzimport 2026-04-18 00:01:21 UTC 
libgphoto2 is a camera access and control library. In versions up to and including 2.5.33, a missing null terminator exists in ptp_unpack_Canon_FE() in camlibs/ptp2/ptp-pack.c (line 1377). The function copies a filename into a 13-byte buffer using strncpy without explicitly null-terminating the result. If the source data is exactly 13 bytes with no null terminator, the buffer is left unterminated, leading to out-of-bounds reads in any subsequent string operation. Commit 259fc7d3bfe534ce4b114c464f55b448670ab873 patches the issue.