CVE-2026-53705 Overview
CVE-2026-53705 is an integer overflow vulnerability in the WavPack audio decoder shipped with GStreamer's gst-plugins-good package. The flaw resides in the gst_wavpack_dec_handle_frame() function, where the buffer size calculation 4 * block_samples * channels overflows when processing a crafted WavPack file. The undersized heap allocation is then overrun by the WavPack library as it writes decoded audio samples, producing heap memory corruption. A remote attacker can trigger the condition by convincing a user to open a malicious WavPack file, leading to application crashes or potential arbitrary code execution. The issue is tracked under [CWE-190] and affects both 32-bit and 64-bit systems because the arithmetic executes in 32-bit integers before promotion.
Critical Impact
Processing a crafted WavPack audio file can corrupt heap memory in any GStreamer-based application, enabling denial of service or arbitrary code execution.
Affected Products
- GStreamer gst-plugins-good WavPack decoder element
- Applications and media frameworks that link gst-plugins-good for audio playback
- Linux distributions packaging vulnerable gst-plugins-good builds (see Red Hat advisory)
Discovery Timeline
- 2026-06-15 - CVE-2026-53705 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-53705
Vulnerability Analysis
The vulnerability lives in gst_wavpack_dec_handle_frame() within the GStreamer WavPack decoder element. The function computes the destination buffer size as 4 * block_samples * channels using 32-bit integer arithmetic. Attacker-controlled values of block_samples and channels in the WavPack frame header cause this expression to wrap around, producing a small allocation size before the result is promoted to the size type used by the allocator.
The decoder then invokes the WavPack library, which writes the full decoded sample stream into the undersized heap buffer. The out-of-bounds write corrupts adjacent heap metadata and chunks, an exploitation primitive well documented for media parsers. The EPSS data indicates a low current exploitation probability, but the user-interaction requirement is minimal because GStreamer is commonly invoked through file managers, browsers, and chat clients that auto-preview media.
Root Cause
The root cause is missing overflow validation prior to allocation. The product of three attacker-influenced 32-bit values is not checked against INT_MAX or against the eventual allocation size, so wraparound produces a buffer that is smaller than the data the decoder will write into it.
Attack Vector
The attacker delivers a malicious .wv file through any vector that ultimately reaches a GStreamer pipeline: a download link, an email attachment, an embedded <audio> tag, or a thumbnailer that probes audio metadata. When the file is opened or previewed, the decoder allocates the undersized buffer and the subsequent decode loop corrupts the heap.
No verified public exploit is available for CVE-2026-53705. Technical details are described in the Red Hat CVE-2026-53705 Advisory and Red Hat Bugzilla 2487615.
Detection Methods for CVE-2026-53705
Indicators of Compromise
- Unexpected crashes of GStreamer-backed applications such as totem, rhythmbox, gst-launch-1.0, or browser media stacks after opening .wv files.
- Heap corruption signatures in core dumps referencing gst_wavpack_dec_handle_frame or symbols from libwavpack.
- Inbound or downloaded WavPack files originating from untrusted sources, particularly with unusual block_samples or channel-count headers.
Detection Strategies
- Inventory installed gst-plugins-good package versions across Linux endpoints and flag hosts that have not received the vendor-patched build.
- Hunt for process crashes of media applications correlated with WavPack file access in audit logs (execve of media players, open on *.wv).
- Enable glibc heap protections such as MALLOC_CHECK_ or AddressSanitizer in test environments to surface the corruption deterministically.
Monitoring Recommendations
- Centralize Linux audit and coredumpctl data to identify repeated faults in GStreamer worker processes.
- Alert on browser or thumbnailer child processes terminating with SIGSEGV or SIGABRT immediately after WavPack content is fetched.
- Track package versions of gst-plugins-good and libwavpack against vendor advisories to confirm patch propagation.
How to Mitigate CVE-2026-53705
Immediate Actions Required
- Update gst-plugins-good to the fixed version published by your Linux distribution as soon as it is available.
- Restrict execution of untrusted WavPack files until patches are deployed, including disabling automatic media previews where feasible.
- Audit applications that embed GStreamer to confirm they pick up the patched shared library after upgrade.
Patch Information
No fixed version is enumerated in NVD at publication time. Consult the Red Hat CVE-2026-53705 Advisory and your distribution's security tracker for patched gst-plugins-good builds. Restart applications that load the library after upgrading so the corrected code path is in use.
Workarounds
- Remove or disable the WavPack decoder element by uninstalling the optional plugin or blocklisting it via GST_PLUGIN_FEATURE_RANK so the pipeline refuses to instantiate it.
- Block delivery of .wv files at the email gateway and web proxy until the patch is installed.
- Run media-handling applications under a sandbox such as bubblewrap, Flatpak, or firejail to contain heap corruption to a restricted process.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
