CVE-2024-23310Public exploitNetwork attack vector

Arbitrary code execution via FAMOS use-after-free

Published Feb 20, 2024 · Updated Nov 4, 2025

Use-after-free in libbiosig 2.5.0 and master ab0ee111 allows attackers to execute arbitrary code via a crafted .famos file. Within sopen_FAMOS_read, FAMOS parsing dereferences memory after it has been freed; public sources do not identify the freed allocation or later access. Triggering requires a consuming application to parse the file, and version 2.6.0 disables FAMOS by default unless BIOSIG_FAMOS_TRUST_INPUT is set.

CVSS severity9.8
Critical
EPSS probability1.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in libbiosig 2.5.0 and master ab0ee111 allows attackers to execute arbitrary code via a crafted .famos file. Within sopen_FAMOS_read, FAMOS parsing dereferences memory after it has been freed; public sources do not identify the freed allocation or later access. Triggering requires a consuming application to parse the file, and version 2.6.0 disables FAMOS by default unless BIOSIG_FAMOS_TRUST_INPUT is set.

The record

CVE
CVE-2024-23310
Published
Feb 20, 2024
Updated
Nov 4, 2025
Vendor
Fedora Project
Product
Fedora Linux
Classifications
CWE-825
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 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?

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  1. Affected versionversion=40

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fedora Project · Fedora Linuxversion=40
The BioSig Project · libbiosigversion=2.5.0; version=Master Branch (ab0ee111)

Published CVSS scores

9.8Cisco TalosCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 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 exploitPublished

Weakness, pattern, technique

CWE-825Expired Pointer Dereference

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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