Bug 2459370 (CVE-2026-40336)

Summary: CVE-2026-40336 libgphoto2: libgphoto2: Memory leak in ptp_unpack_Sony_DPD() can lead to denial of service
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: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in libgphoto2, a camera access and control library. When processing a secondary enumeration list from certain Sony cameras, the `ptp_unpack_Sony_DPD()` function improperly handles memory allocation. This oversight causes a memory leak, which can lead to resource exhaustion and potentially result in a Denial of Service (DoS) for applications utilizing the library.
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Description OSIDB Bzimport 2026-04-18 00:02:05 UTC 
libgphoto2 is a camera access and control library. Versions up to and including 2.5.33 have a memory leak in `ptp_unpack_Sony_DPD()` in `camlibs/ptp2/ptp-pack.c` (lines 884–885). When processing a secondary enumeration list (introduced in 2024+ Sony cameras), the function overwrites dpd->FORM.Enum.SupportedValue with a new calloc() without freeing the previous allocation from line 857. The original array and any string values it contains are leaked on every property descriptor parse. Commit 404ff02c75f3cb280196fc260a63c4d26cf1a8f6 fixes the issue.