GNU GNU C Library
YES - ON THE CISA KEV LIST
CVE-2023-4911
GNU C Library Buffer Overflow Vulnerability
overdue since 2023-12-12
GNU: 5 entries (0.3% of all KEV entries are from this vendor); 1 added in 2026.
BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.
Your BOD 26-04 window (SSVC tier helper)
Your remediation window ends:
Description
GNU C Library's dynamic loader ld.so contains a buffer overflow vulnerability when processing the GLIBC_TUNABLES environment variable, allowing a local attacker to execute code with elevated privileges.
Required action (CISA)
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes
This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=1056e5b4c3f2d90ed2b4a55f96add28da2f4c8fa, https://access.redhat.com/security/cve/cve-2023-4911, https://www.debian.org/security/2023/dsa-5514 ; https://nvd.nist.gov/vuln/detail/CVE-2023-4911
References
Other KEV entries for this vendor: GNU
- CVE-2026-24061 - InetUtils (2026-01-26)
- CVE-2014-6278 - GNU Bash (2025-10-02)
- CVE-2014-6271 - Bourne-Again Shell (Bash) (2022-01-28)
- CVE-2014-7169 - Bourne-Again Shell (Bash) (2022-01-28)
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