EUVD-2026-76770
GHSA-4hj2-h365-qx39
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable via file upload with no auth or interaction required in server contexts; availability high from crash, limited integrity from heap corruption, no confidentiality impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
stb_vorbis through 1.22 contains a heap buffer overflow in start_decoder() where the codebook multiplicands allocation size is truncated from size_t to int. Attackers can craft a malicious Ogg Vorbis file with large entries and dimensions values to trigger out-of-bounds writes, causing process crashes or heap corruption.
AnalysisAI
Heap buffer overflow in stb_vorbis through 1.22 allows remote attackers to crash or corrupt the heap of any application that parses attacker-supplied Ogg Vorbis audio. The root cause is an integer truncation bug in start_decoder() where the codebook multiplicands allocation size is computed as a size_t but narrowed to int before being passed to the allocator, enabling a heap undersizing condition triggerable by crafting codebook entries and dimensions values that overflow the int range. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that an attacker can supply a malicious Ogg Vorbis file to a process that parses it using stb_vorbis ≤1.22. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.8 (AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H) accurately captures the core risk for server-side deployments: a single malformed Ogg Vorbis file delivered over the network is sufficient to crash or heap-corrupt the consuming process without any authentication. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released tagged patch version is confirmed from available data; consumers should monitor the upstream repository at https://github.com/nothings/stb for a commit that widens the allocation size variable from int to size_t in start_decoder(). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems and applications using stb_vorbis versions ≤1.22 and their exposure to untrusted Ogg Vorbis input; disable Ogg Vorbis support or restrict file uploads where feasible until patching is complete. …
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Use of uninitialized stack variables in the start_decoder function in stb_vorbis through 2019-03-04 allows an attacker t
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A NULL pointer dereference in the get_window function in stb_vorbis through 2019-03-04 allows an attacker to cause a den
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Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today