CVE-2020-24822Public exploit

Process crash via out-of-bounds ULEB128 read

Published Aug 4, 2021 · Updated Aug 4, 2024

Out-of-bounds read in dwarf::cursor::uleb in Libelfin 0.3 allows local users to crash a consuming process via a crafted ELF file. The ULEB128 decoder reads outside mapped ELF data while dwarf::die::read resolves a malformed reference. Processing attacker-controlled ELF or DWARF data is required, and the resulting SIGSEGV terminates the affected process.

CVSS severity5.5
Medium
EPSS probability0.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in dwarf::cursor::uleb in Libelfin 0.3 allows local users to crash a consuming process via a crafted ELF file. The ULEB128 decoder reads outside mapped ELF data while dwarf::die::read resolves a malformed reference. Processing attacker-controlled ELF or DWARF data is required, and the resulting SIGSEGV terminates the affected process.

The record

CVE
CVE-2020-24822
Published
Aug 4, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-74, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 4, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.3NVDAV:N/AC:M/Au:N/C:N/I:N/A:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1204.002User Execution: Malicious File

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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