CVE-2025-63396Public exploit

Process crash or hang via unstopped profiler

Published Nov 12, 2025 · Updated Jul 5, 2026

Denial of service in PyTorch 2.5 and 2.7.1 allows local users to crash or hang a profiling process during result finalization. Accessing profiler.key_averages().table() before profiler.stop() leaves PythonTracer finalization without an orderly stop, causing a crash in 2.5 or a hang in 2.7.1. Local users must be able to run or influence profiling code, and the demonstrated consequence is limited to interruption of the affected process.

CVSS severity3.3
Low
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in PyTorch 2.5 and 2.7.1 allows local users to crash or hang a profiling process during result finalization. Accessing profiler.key_averages().table() before profiler.stop() leaves PythonTracer finalization without an orderly stop, causing a crash in 2.5 or a hang in 2.7.1. Local users must be able to run or influence profiling code, and the demonstrated consequence is limited to interruption of the affected process.

The record

CVE
CVE-2025-63396
Published
Nov 12, 2025
Updated
Jul 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-667, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 2026Record 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 vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.3CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-667Improper Locking
T1499Endpoint Denial of Service

Public exploit references

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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