CVE-2024-2961
Out-of-bounds Write
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Description
The iconv() function in the GNU C Library versions 2.39 and older may overflow the output buffer passed to it by up to 4 bytes when converting strings to the ISO-2022-CN-EXT character set, which may be used to crash an application or overwrite a neighbouring variable.
Official description from the CVE record, published by glibc. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org
Key data
CVSS 3.1 High 7.3
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Attack vector: Local
The attacker needs local access to the system, or to trick a user into running something.
Attack complexity: Low
No special conditions are needed. The attack can be repeated at will.
Privileges required: None
No account or privileges are needed.
User interaction: None
No action from any user is needed.
Scope: Unchanged
The impact stays within the vulnerable component.
Confidentiality impact: Low
Limited effect on the secrecy of data.
Integrity impact: Low
Limited effect on the trustworthiness of data.
Availability impact: High
Serious or total effect on availability.
| Metric | Value | What it means |
|---|---|---|
| Attack vector | Local | The attacker needs local access to the system, or to trick a user into running something. |
| Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. |
| Privileges required | None | No account or privileges are needed. |
| User interaction | None | No action from any user is needed. |
| Scope | Unchanged | The impact stays within the vulnerable component. |
| Confidentiality impact | Low | Limited effect on the secrecy of data. |
| Integrity impact | Low | Limited effect on the trustworthiness of data. |
| Availability impact | High | Serious or total effect on availability. |
CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.
EPSS
- Score
- 0.88330 (88.3% probability)
- Percentile
- 99.8%
- Scores of
- Nov 10, 2026
- Model
- v2026.06.15
CISA assessment as of Oct 30, 2025
- Exploitation
- Public proof of concept recorded by CISA
- Automatable
- no
- Technical impact
- partial
Weakness (CWE)
- CWE-787Out-of-bounds Write
Affected products
The GNU C Library glibc
- affected: 2.1.93 up to before 2.40
References
- sourceware.org/git/?p=glibc.git;a=blob;f=advisories/GLIBC-S…
- lists.fedoraproject.org/archives/list/package-announce@list…
- lists.fedoraproject.org/archives/list/package-announce@list…
- lists.fedoraproject.org/archives/list/package-announce@list…
- openwall.com/lists/oss-security/2024/04/24/2
- openwall.com/lists/oss-security/2024/04/17/9
- openwall.com/lists/oss-security/2024/04/18/4
- lists.debian.org/debian-lts-announce/2024/05/msg00001.html
- openwall.com/lists/oss-security/2024/05/27/2
- openwall.com/lists/oss-security/2024/05/27/6
- openwall.com/lists/oss-security/2024/05/27/1
- openwall.com/lists/oss-security/2024/05/27/4
- openwall.com/lists/oss-security/2024/05/27/5
- openwall.com/lists/oss-security/2024/05/27/3
- security.netapp.com/advisory/ntap-20240531-0002
- openwall.com/lists/oss-security/2024/07/22/5
- ambionics.io/blog/iconv-cve-2024-2961-p1
- ambionics.io/blog/iconv-cve-2024-2961-p2
- ambionics.io/blog/iconv-cve-2024-2961-p3
Timeline
- ID reserved
- Record published
- Record last updated
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About CubePath
Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:51 UTC. Sources and licenses