Host process exhaustion via overwritten enumeration allocation
Published Apr 17, 2026 · Updated Apr 17, 2026
Memory leak in gPhoto libgphoto2 2.5.33 and earlier allows physically proximate attackers to exhaust host-process memory via crafted Sony responses. ptp_unpack_Sony_DPD overwrites dpd->FORM.Enum.SupportedValue with a second allocation while parsing a secondary enumeration list, without releasing the original array or its strings. Exploitation requires a malicious physically connected camera to return repeated property descriptors; heap growth can interrupt only the host process.
Summary
What happened
Memory leak in gPhoto libgphoto2 2.5.33 and earlier allows physically proximate attackers to exhaust host-process memory via crafted Sony responses. ptp_unpack_Sony_DPD overwrites dpd->FORM.Enum.SupportedValue with a second allocation while parsing a secondary enumeration list, without releasing the original array or its strings. Exploitation requires a malicious physically connected camera to return repeated property descriptors; heap growth can interrupt only the host process.
The record
- CVE
- CVE-2026-40336
- Published
- Apr 17, 2026
- Updated
- Apr 17, 2026
- Vendor
- gPhoto
- Product
- libgphoto2
- Classifications
- CWE-401, T1499.004
- Attack vector
- physical
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 17, 2026CVE publishedPublication date reported by the CVE source.
- Apr 17, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=<= 2.5.33
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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