CVE-2022-34300Network attack vector

Memory disclosure and crash via stride miscalculation

Published Jun 22, 2022 · Updated Aug 3, 2024

Heap-based buffer over-read in TinyEXR 1.0.1 allows context-dependent attackers to read memory or crash applications via crafted EXR files. For FLOAT channels, DecodePixelData calculates input row offsets with x_stride instead of width, permitting reads beyond the allocated heap buffer. A user or consuming application must process an attacker-supplied EXR file; successful access can disclose adjacent heap data or terminate the process.

CVSS severity8.8
High
EPSS probability1.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer over-read in TinyEXR 1.0.1 allows context-dependent attackers to read memory or crash applications via crafted EXR files. For FLOAT channels, DecodePixelData calculates input row offsets with x_stride instead of width, permitting reads beyond the allocated heap buffer. A user or consuming application must process an attacker-supplied EXR file; successful access can disclose adjacent heap data or terminate the process.

The record

CVE
CVE-2022-34300
Published
Jun 22, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A: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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1204.002Malicious File

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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