Published : June 28, 2026, 1:32 a.m. | 23 hours, 39 minutes ago
Description :FFmpeg’s RASC video decoder (decode_dlta in libavcodec/rasc.c) performs 32-bit reads and writes at the row cursor before the NEXT_LINE row-boundary check and validates the DLTA region in pixel rather than byte units, so a DLTA run on a PAL8 frame can access several bytes past the row allocation. A crafted media stream using the RASC FourCC, decoded by libavcodec, triggers a bitstream-controlled out-of-bounds heap write and adjacent out-of-bounds read, leading to memory corruption.
Severity: 8.8 | HIGH
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🤖 AI-Generated Patch Solution
Google Gemini (gemini-2.5-flash) • CVE: CVE-2026-58049
N/A
Immediately disconnect or isolate any systems running the vulnerable component from external networks. If possible, shut down the affected service or application to prevent further exploitation. Review all relevant system, application, and network logs for any indicators of compromise (IOCs) such as unusual process execution, unexpected network connections, unauthorized file modifications, or suspicious error messages. Prioritize logs from the period immediately preceding and following the public disclosure of CVE-2026-58049. Create forensic images or backups of affected systems to preserve evidence for later analysis, even if no immediate signs of compromise are found. Notify your organization's incident response team and relevant stakeholders about the potential exposure.
2. PATCH AND UPDATE INFORMATION
As of the current information, there is no official patch or security update available for CVE-2026-58049. It is critical to continuously monitor the official vendor security advisories, mailing lists, and support channels for the immediate release of a patch or a recommended workaround. Do not apply unofficial patches or workarounds from unverified sources, as these may introduce further vulnerabilities or instability. Prepare your update infrastructure and personnel for rapid deployment of the official patch once it becomes available, including planning for testing in a non-production environment if feasible to minimize service disruption.
3. MITIGATION STRATEGIES
Implement strict network segmentation to isolate systems running the vulnerable component, limiting their network access to only essential services and trusted IP ranges. Deploy or update Web Application Firewall (WAF) rules to detect and block exploit attempts targeting the vulnerability. This may involve creating custom rules if specific attack patterns become known. Restrict network access to the vulnerable service using host-based firewalls or network access control lists (ACLs) to only necessary internal systems or specific IP addresses. If the vulnerability is tied to a specific feature or module, disable that functionality if it is not critical for business operations. Ensure that the vulnerable service runs with the principle of least privilege, meaning it has only the minimum necessary permissions to function. Implement robust input validation at the application layer to sanitize or reject any user-supplied data that could be leveraged for exploitation, especially if the vulnerability involves injection or arbitrary command execution. Consider deploying a reverse proxy or load balancer configured to filter or block suspicious requests before they reach the vulnerable application.
4. DETECTION METHODS
Proactively monitor application logs for unusual errors, unexpected stack traces, or any signs of process execution originating from the application process. Scrutinize web server access logs for unusual