CVE-2024-33602

Memory corruption via out-of-buffer NSS strings

Published May 6, 2024 · Updated Jul 14, 2026

Memory corruption in glibc 2.15 through 2.39 allows local users to corrupt nscd memory through crafted netgroup lookups. The addgetnetgrentX buffer-resizing path assumes every NSS callback string points into its supplied buffer, so an external pointer becomes invalid when that buffer is resized. Reachability requires the nscd binary, netgroup caching, and an NSS callback that returns an out-of-buffer string; Siemens embeds the affected code in the additional GNU/Linux subsystem of listed controller firmware.

CVSS severity7.4
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in glibc 2.15 through 2.39 allows local users to corrupt nscd memory through crafted netgroup lookups. The addgetnetgrentX buffer-resizing path assumes every NSS callback string points into its supplied buffer, so an external pointer becomes invalid when that buffer is resized. Reachability requires the nscd binary, netgroup caching, and an NSS callback that returns an out-of-buffer string; Siemens embeds the affected code in the additional GNU/Linux subsystem of listed controller firmware.

The record

CVE
CVE-2024-33602
Published
May 6, 2024
Updated
Jul 14, 2026
Vendor
The GnuPG Project
Product
glibc
Classifications
CWE-466, CAPEC-129
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 6, 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=2.15 <2.40

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The GnuPG Project · glibcversion=2.15 <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

7.4SiemensCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
7.4CISACVSS:3.1/AV:L/AC:H/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-466Return of Pointer Value Outside of Expected Range
CAPEC-129Pointer Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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