FFmpeg

FFmpeg versions prior to commit acf5d7c contain a heap-based buffer overflow in the hvcC box writer that can be triggered during HEVC file muxing, potentially leading to arbitrary code execution.

FFmpeg versions 0.5 through 8.9 are vulnerable to a signed integer overflow in the DVB subtitle parser that can be triggered via a crafted WTV file to achieve remote code execution.

A heap out-of-bounds write vulnerability exists in the vf_quirc filter of FFmpeg versions 7.0 through 8.1.2, allowing an attacker to corrupt heap memory and potentially achieve arbitrary code execution by supplying a crafted PGS/SUP subtitle file with mismatched frame dimensions.

A signed integer overflow vulnerability, CVE-2026-66039, exists in the MACE6 audio decoder of FFmpeg versions through 8.1.2, allowing attackers to corrupt heap memory and achieve code execution by supplying a crafted CAF file with malicious bytes_per_packet and frames_per_packet values.

A heap out-of-bounds write vulnerability exists in FFmpeg through version 8.1.2, specifically within the vf_hqdn3d filter, allowing attackers to corrupt heap memory by providing a crafted video input where frame resolution increases between frames while filtergraph reinitialization is disabled, leading to undersized buffers and a write beyond allocation boundaries.

A critical out-of-bounds write vulnerability (CVE-2026-65706) exists in FFmpeg versions 3.0 through 8.1.2 within the vf_swaprect video filter, allowing attackers to corrupt heap memory and achieve potential remote code execution by providing a specially crafted NV12 video frame with odd width dimensions.

A critical out-of-bounds write vulnerability exists in FFmpeg versions 3.4 through 8.1.2 within the vf_floodfill video filter, which attackers can exploit by providing a specially crafted, dynamically sized video stream with filtergraph reinitialization disabled via -reinit_filter 0, leading to heap corruption, a process crash, and potentially remote code execution.

FFmpeg versions 0.6.3 through 8.1.2 are vulnerable to a remote denial of service (DoS) via CVE-2026-64834, allowing an attacker to trigger an infinite loop in the `rtp_asf_fix_header` function by sending a crafted RTP/ASF stream, leading to CPU exhaustion and service unavailability.

A high-severity out-of-bounds memory access vulnerability, tracked as CVE-2026-64835, exists in FFmpeg versions 4.4 through 8.1.2 within the ADX audio decoder, allowing attackers to trigger both out-of-bounds reads and writes by supplying a crafted ADX or AAX audio file with a mid-stream channel layout change, potentially leading to denial of service, information disclosure, or arbitrary code execution.

FFmpeg versions 0.7.1 through 8.1.2 contain an out-of-bounds read vulnerability in the S/PDIF muxer, allowing attackers to exploit a missing bounds check in the `spdif_header_dts4` function by supplying a crafted DTS stream with an oversized `core_size` value during S/PDIF re-muxing, leading to unauthorized memory reads beyond the packet buffer and potential information disclosure or denial of service.

FFmpeg versions 4.4 through 8.1.2 are vulnerable to a double-free condition within the NVIDIA NVDEC hardware decoder component (libavcodec/nvdec.c), allowing attackers to trigger memory corruption by providing a specially crafted video file, which occurs when an error path frees memory via `nvdec_fdd_priv_free` due to no decoder surfaces remaining, and a subsequent layer attempts to free the same frame description data, resulting in a double-free of the underlying decoder context in any FFmpeg-based application using NVDEC hardware acceleration.

A stack buffer overflow vulnerability exists in the Vulkan HEVC hardware decoder within FFmpeg versions 8.0 through 8.1.2, allowing remote attackers to achieve arbitrary code execution by crafting a malicious HEVC/H.265 bitstream with an oversized vps_num_hrd_parameters value that overwrites return addresses and adjacent stack frames in the vk_hevc_end_frame function.

FFmpeg versions 2.1 through 8.1.2 contain a heap buffer overflow vulnerability (CVE-2026-64830) in the VobSub subtitle demuxer, allowing attackers to corrupt adjacent heap memory by supplying a malicious .sub/.idx subtitle file, potentially leading to arbitrary code execution in applications using FFmpeg's VobSub demuxer.

A vulnerability in ffmpeg allows an attacker to execute arbitrary program code and potentially conduct a denial of service attack.