Glibc Security Update — AlmaLinux 9 (ALSA-2026:42952)
This is a security release for AlmaLinux 9. Update the product on every affected server to the patched release — there is no workaround, and unpatched servers remain exposed until updated.
Fix Commands
EL8+ (AlmaLinux/CloudLinux/Rocky)
sudo dnf updateWhat this means under a SharedLicense license
Your SharedLicense license itself is not affected — this is a change in AlmaLinux 9 software, not in licensing. Update the product through its standard update channel. Licenses keep working through updates; nothing needs re-issuing or re-activating.
The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the name service cache daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly.
Security Fix(es):
* glibc: gl…
The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the name service cache daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. Security Fix(es): * glibc: glibc: Information disclosure or denial of service via ungetwc function with specific wide character encodings (CVE-2026-5928) * glibc: glibc: Out-of-bounds write via TSIG record processing (CVE-2026-5435) * glibc: glibc: Application crash or uninitialized memory read via crafted DNS response (CVE-2026-6238) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References
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