Description

Lightroom Classic is affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-11T18:17:30.627Z",
  "pubdate": "2026-08-11T18:17:30.627Z",
  "executiveSummary": "Adobe Lightroom Classic is impacted by a memory corruption flaw specifically categorized as an out-of-bounds write vulnerability. This security deficiency poses significant risk to system integrity and confidentiality by potentially allowing an adversary to achieve arbitrary code execution within the security context of the currently logged-in user. The existence of this vulnerability threatens end-user systems processing untrusted imagery and project files. Successful exploitation enables threat actors to execute arbitrary payloads with the privileges of the victim user, potentially compromising the entire workstation depending on user privilege configurations and system hardening measures. The primary operational prerequisite for successful exploitation is active user interaction, specifically requiring the victim to open a maliciously crafted file using the vulnerable application. Without this user-assisted ingestion vector, the attack vector remains unexploited. Organizations and individual users utilizing Lightroom Classic must understand that malicious file parsing routines represent a critical attack surface, necessitating strict adherence to safe file handling practices and prompt application of vendor-supplied software updates as soon as they become publicly available.",
  "technicalDetails": "The vulnerability resides in the file parsing subsystem of Lightroom Classic, specifically within routines responsible for handling structural data inside input files. The root cause is an out-of-bounds write condition, indicative of improper bounds checking during the parsing and processing of specially crafted file formats. When Lightroom Classic ingests a malicious file, the application allocates memory buffers based on internal size indicators derived directly from the untrusted file headers without adequately validating these boundaries against actual physical buffer allocations.\nDuring the parsing workflow, the application attempts to write data beyond the boundaries of the designated heap or stack buffer. This improper memory management operation leads to adjacent memory corruption, overwriting critical internal application structures, function pointers, or control data. If an attacker meticulously crafts the malicious file layout, they can control the overwritten memory contents to redirect execution flow to arbitrary shellcode or malicious payload constructs embedded within the file structure.\nThe attack vector requires local user interaction, as the victim must manually or automatically open the malicious file through Lightroom Classic. Network exposure is indirect, relying on social engineering or drive-by downloads to deliver the exploit file to the local filesystem. Authentication is not required, and the exploitation executes locally within the standard privilege level of the user running the application. Post-exploitation impact includes complete application compromise and arbitrary code execution under the current user's security context, potentially allowing data exfiltration, installation of persistent backdoors, or lateral movement within the local environment if the user possesses elevated system privileges."
}