CVE-2024-2961Public exploit

Crashes and data corruption via iconv bounds omission

Published Apr 17, 2024 · Updated Jul 14, 2026

Out-of-bounds write in GNU C Library glibc 2.39 and earlier allows attackers to crash applications or corrupt adjacent data through iconv(). The ISO-2022-CN-EXT converter writes SS2 or SS3 escape sequences without first confirming that four output bytes remain. Reachability requires an application, including the GNU/Linux subsystem in affected Siemens MFP controllers, to convert attacker-influenced text to ISO-2022-CN-EXT.

CVSS severity7.3
High
EPSS probability88.33%
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 write in GNU C Library glibc 2.39 and earlier allows attackers to crash applications or corrupt adjacent data through iconv(). The ISO-2022-CN-EXT converter writes SS2 or SS3 escape sequences without first confirming that four output bytes remain. Reachability requires an application, including the GNU/Linux subsystem in affected Siemens MFP controllers, to convert attacker-influenced text to ISO-2022-CN-EXT.

The record

CVE
CVE-2024-2961
Published
Apr 17, 2024
Updated
Jul 14, 2026
Vendor
The GnuPG Project
Product
glibc
Classifications
CWE-787
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 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?

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

  1. Affected versionversion=2.1.93 <2.40

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The GnuPG Project · glibcversion=2.1.93 <2.40
Siemens · SIPLUS S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.5 <*
Siemens · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPversion=V3.1.5 <*
Siemens · SIMATIC S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.5 <*

Published CVSS scores

7.3Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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