ALSA-2026%3A20597
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: Incorrect DNS response parsing via crafted DNS server response (CVE-2026-4437) * glibc: glibc: Invalid DNS hostname returned via gethostbyaddr functions (CVE-2026-4438) * glibc: glibc: Denial of Service via iconv() function with specific character sets (CVE-2026-4046) 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.
Risk Scores
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| AlmaLinux:9 | glibc-langpack-tpi | 0 |
| AlmaLinux:9 | glibc-langpack-en | 0 |
| AlmaLinux:9 | glibc-langpack-af | 0 |
| AlmaLinux:9 | glibc-langpack-kab | 0 |
| AlmaLinux:9 | glibc-langpack-mai | 0 |
| AlmaLinux:9 | glibc-langpack-gv | 0 |
| AlmaLinux:9 | glibc | 0 |
| AlmaLinux:9 | glibc-langpack-et | 0 |
| AlmaLinux:9 | glibc-langpack-ce | 0 |
| AlmaLinux:9 | glibc-langpack-tl | 0 |
| AlmaLinux:9 | glibc-langpack-ja | 0 |
| AlmaLinux:9 | libnsl | 0 |
| AlmaLinux:9 | glibc-utils | 0 |
| AlmaLinux:9 | glibc-langpack-ne | 0 |
| AlmaLinux:9 | glibc-langpack-cy | 0 |
| AlmaLinux:9 | nscd | 0 |
| AlmaLinux:9 | glibc-langpack-nn | 0 |
| AlmaLinux:9 | glibc-langpack-dz | 0 |
| AlmaLinux:9 | glibc-langpack-tcy | 0 |
| AlmaLinux:9 | glibc-langpack-es | 0 |
…and 196 more
Timeline
- May 26, 2026 CVE Published
- Jun 30, 2026 CVE Updated
- Jul 1, 2026 Distribution Patch
- Jul 1, 2026 Distribution Patch
- Jul 1, 2026 Security Advisory
References
- https://access.redhat.com/errata/RHSA-2026:20597 advisory
- https://access.redhat.com/security/cve/CVE-2026-4046 report
- https://access.redhat.com/security/cve/CVE-2026-4437 report
- https://access.redhat.com/security/cve/CVE-2026-4438 report
- https://bugzilla.redhat.com/2449777 report
- https://bugzilla.redhat.com/2449783 report
- https://bugzilla.redhat.com/2453117 report
- https://errata.almalinux.org/9/ALSA-2026-20597.html advisory