CVE-2022-39170Public exploitNetwork attack vector

Application crash via stale frame-instruction pointer

Published Sep 2, 2022 · Updated Aug 3, 2024

Double free in libdwarf 0.4.1 allows context-dependent attackers to crash a calling application via a crafted object file. _dwarf_exec_frame_instr retains a stale dfi pointer after linking it into the instruction list, so error cleanup frees the same allocation twice. The application must process attacker-controlled corrupt frame data, and the documented consequence is process termination rather than code execution.

CVSS severity8.8
High
EPSS probability1.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double free in libdwarf 0.4.1 allows context-dependent attackers to crash a calling application via a crafted object file. _dwarf_exec_frame_instr retains a stale dfi pointer after linking it into the instruction list, so error cleanup frees the same allocation twice. The application must process attacker-controlled corrupt frame data, and the documented consequence is process termination rather than code execution.

The record

CVE
CVE-2022-39170
Published
Sep 2, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-415, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 2, 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

8.8CanonicalCVSS: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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-415Double Free
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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