Security readout for executives and security teams
CVE-2021-3326 is a denial-of-service flaw in GNU glibc. When software converts malformed text using the ISO-2022-JP-3 character set, glibc can hit an internal assertion and abort the process. Business impact depends on whether exposed services process attacker-controlled text through iconv. Exposure is most likely on Linux systems using glibc 2.32 or earlier where network-reachable applications convert untrusted character encodings with iconv, especially ISO-2022-JP-3. The source bundle does not enumerate specific affected application products. Prioritize remediation where glibc-backed services process external text, because a malformed input could crash business-facing applications. This is not evidenced as active exploitation, but the low attack complexity and high availability impact justify timely patching. Mitigation focus: Apply vendor glibc or libc6 security updates for affected distributions and appliances.; Confirm updates include the upstream glibc fix for CVE-2021-3326.; Prioritize internet-facing services that process user-supplied text or email content..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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Open ATT&CK lookupCVE-2021-3326 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
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CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://sourceware.org/bugzilla/show_bug.cgi?id=27256CVE reference
- https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=7d88c6142c6efc160c0ee5e4f85cde382c072888CVE reference
- GLSA-202107-07CVE reference · vendor-advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlCVE reference
- https://security.netapp.com/advisory/ntap-20210304-0007/CVE reference
- https://www.oracle.com/security-alerts/cpuapr2022.htmlCVE reference
- [debian-lts-announce] 20221017 [SECURITY] [DLA 3152-1] glibc security updateCVE reference · mailing-list
Products and packages named in the record
CWE details
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Reachable Assertion
Reachable Assertion represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.