EUVD-2026-74906
GHSA-35jx-w2j3-h2m2
Severity by source
CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/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
AV:L and UI:R because the user must open a local or downloaded file; AC:L because the overflow is deterministic given attacker-chosen IHDR dimensions; full C/I/A:H for heap OOB write with attacker-controlled content enabling potential RCE.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
5DescriptionCVE.org
VLC media player computes the size of a picture buffer with 32-bit arithmetic and allocates from the wrapped result. In AllocatePicture in src/misc/picture.c the running total is accumulated as i_bytes += p->i_pitch * p->i_lines, and both plane_t fields are declared int in include/vlc_picture.h, so the multiplication is evaluated at 32 bits and wraps before it is widened to the size_t accumulator. The overflow check that precedes it divides in 64-bit arithmetic and therefore does not constrain the product, and the subsequent comparison against PICTURE_SW_SIZE_MAX examines the already wrapped value, so both guards pass. aligned_alloc then reserves the small wrapped size while the decoder writes scanlines sized from the original dimensions. A crafted PNG whose IHDR declares large width and height reaches this path through the image demuxer, whose only size guard is on the input file's byte count rather than the declared dimensions, and the decoder in modules/codec/png.c writes past the end of the allocation with attacker-influenced length and content. Opening the file directly or through a playlist entry is sufficient, with no non-default settings.
AnalysisAI
Heap out-of-bounds write in VLC Media Player 3.0.0 through 3.0.23 allows a local attacker to corrupt memory by tricking a user into opening a crafted PNG file with attacker-controlled dimensions. The root cause is a 32-bit integer overflow in AllocatePicture() where plane pitch-times-lines multiplication wraps before widening to the size_t accumulator, causing both overflow guards to pass on the already-corrupted value; aligned_alloc then reserves a small wrapped buffer while the PNG decoder writes full-dimension scanlines past its end. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The only prerequisite is that the victim opens a crafted PNG file in VLC 3.0.0-3.0.23 - either directly or via a playlist entry containing the PNG. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Real-world exploitation risk is moderate-low despite the severity of the primitive. … 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 patched version has been independently confirmed from the available references at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit systems running VLC Media Player 3.0.0 through 3.0.23 and notify users to avoid opening PNG files from untrusted sources; assess feasibility of disabling PNG codec support as an interim control. …
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External POC / Exploit Code
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