CVE-2025-46333

Memory corruption via negative-offset stride overflow

Published Apr 25, 2025 · Updated Apr 28, 2025

Memory corruption in z2d after 0.5.1 through 0.6.0 allows local users to corrupt process memory via negative surface offsets. StrideCompositor.run converts a fully out-of-bounds negative x offset into an overflowing stride length and then uses that length for surface composition. The flaw is reachable through direct composition or default-antialiasing fill and stroke operations in ReleaseFast or ReleaseSmall builds, where safety checks do not stop invalid memory access.

CVSS severity7.3
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in z2d after 0.5.1 through 0.6.0 allows local users to corrupt process memory via negative surface offsets. StrideCompositor.run converts a fully out-of-bounds negative x offset into an overflowing stride length and then uses that length for surface composition. The flaw is reachable through direct composition or default-antialiasing fill and stroke operations in ReleaseFast or ReleaseSmall builds, where safety checks do not stop invalid memory access.

The record

CVE
CVE-2025-46333
Published
Apr 25, 2025
Updated
Apr 28, 2025
Vendor
Chris Marchesi
Product
z2d
Classifications
CWE-119, CWE-190, CWE-122
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=> 0.5.1, <= 0.6.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Chris Marchesi · z2dversion=> 0.5.1, <= 0.6.0

Published CVSS scores

7.3GitHubCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-190Integer Overflow or Wraparound
CWE-122Heap-based Buffer Overflow

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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