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Vulnerability record · CVE-2021-3326 · published 27 January 2021

CVE-2021-3326: Gnu glibc vulnerability

Gnu · Glibc

The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier, when processing invalid input sequences in the ISO-2022-JP-3 encoding, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.

7.5 CVSS 3.1 High EPSS 3.1% · top 12.8% CWE-617 · CWE-617
7.5CVSS 3.1 base score, v2 5.0
3.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
11Affected product versions listed by NVD
16References
17 Jun 2026Last modified by NVD

Description

The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier, when processing invalid input sequences in the ISO-2022-JP-3 encoding, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

11 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2021/01/28/2 Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202107-07 Third Party Advisory
https://security.netapp.com/advisory/ntap-20210304-0007/ Third Party Advisory
https://sourceware.org/bugzilla/show_bug.cgi?id=27256 Issue TrackingThird Party Advisory
https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=7d88c6142c6efc160c0ee5e4f85cde382c072888
https://www.oracle.com/security-alerts/cpuapr2022.html Not Applicable
https://www.oracle.com/security-alerts/cpujan2022.html PatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/01/28/2 Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202107-07 Third Party Advisory
https://security.netapp.com/advisory/ntap-20210304-0007/ Third Party Advisory
https://sourceware.org/bugzilla/show_bug.cgi?id=27256 Issue TrackingThird Party Advisory
https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=7d88c6142c6efc160c0ee5e4f85cde382c072888
https://www.oracle.com/security-alerts/cpuapr2022.html Not Applicable
https://www.oracle.com/security-alerts/cpujan2022.html PatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-3326), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.