CVE-2024-52531Public exploit

Heap corruption via undersized UTF-8 destination

Published Nov 11, 2024 · Updated Nov 3, 2025

Buffer overflow in GNOME libsoup before 3.6.1 allows local users to corrupt heap memory through invalid parameter text. The decode_rfc5987 path copies converted UTF-8 text into the original encoded buffer with strcpy even when conversion requires more bytes. The parser must receive invalid nonnetwork input; published demonstrations crash an instrumented process and overwrite adjacent heap metadata.

CVSS severity6.5
Medium
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in GNOME libsoup before 3.6.1 allows local users to corrupt heap memory through invalid parameter text. The decode_rfc5987 path copies converted UTF-8 text into the original encoded buffer with strcpy even when conversion requires more bytes. The parser must receive invalid nonnetwork input; published demonstrations crash an instrumented process and overwrite adjacent heap metadata.

The record

CVE
CVE-2024-52531
Published
Nov 11, 2024
Updated
Nov 3, 2025
Vendor
GNOME
Product
libsoup
Classifications
CWE-120, CWE-787
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.6.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

GNOME · libsoupversion=0 <3.6.1

Published CVSS scores

6.5UbuntuCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
8.7SUSECVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
8.4Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.4CISA ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.5MITRECVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
7.5SUSECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-787Out-of-bounds Write

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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