Red Hat Security Advisory: glibc security update
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: 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.
AI Analysis
Technical Summary
The glibc packages in Red Hat Enterprise Linux 8 and 10 contain a denial of service vulnerability identified as CVE-2026-4046. This flaw occurs in the iconv() function when handling certain character sets, which can cause the process or system to hang or crash. The vulnerability affects standard C libraries, POSIX thread libraries, math libraries, and the name service cache daemon, all vital for system functionality. Red Hat has issued security advisories RHSA-2026:20587 and RHSA-2026:20594 providing updated glibc packages that fix this issue. The vulnerability is rated as moderate severity by Red Hat Product Security.
Potential Impact
Successful exploitation of this vulnerability can cause denial of service conditions on affected systems by triggering a hang or crash in the iconv() function of glibc. This can disrupt normal operation of multiple programs relying on these libraries, potentially leading to system instability or unavailability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released official security updates for glibc to address CVE-2026-4046. Users should apply the provided patches for their respective Red Hat Enterprise Linux 8 and 10 versions as detailed in advisories RHSA-2026:20587 and RHSA-2026:20594. Refer to https://access.redhat.com/articles/11258 for update instructions. Applying these updates will remediate the vulnerability. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: glibc security update
Description
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: 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.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The glibc packages in Red Hat Enterprise Linux 8 and 10 contain a denial of service vulnerability identified as CVE-2026-4046. This flaw occurs in the iconv() function when handling certain character sets, which can cause the process or system to hang or crash. The vulnerability affects standard C libraries, POSIX thread libraries, math libraries, and the name service cache daemon, all vital for system functionality. Red Hat has issued security advisories RHSA-2026:20587 and RHSA-2026:20594 providing updated glibc packages that fix this issue. The vulnerability is rated as moderate severity by Red Hat Product Security.
Potential Impact
Successful exploitation of this vulnerability can cause denial of service conditions on affected systems by triggering a hang or crash in the iconv() function of glibc. This can disrupt normal operation of multiple programs relying on these libraries, potentially leading to system instability or unavailability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released official security updates for glibc to address CVE-2026-4046. Users should apply the provided patches for their respective Red Hat Enterprise Linux 8 and 10 versions as detailed in advisories RHSA-2026:20587 and RHSA-2026:20594. Refer to https://access.redhat.com/articles/11258 for update instructions. Applying these updates will remediate the vulnerability. No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:20594
- Cve Count
- 1
- State
- PUBLISHED
Threat ID: 6a160976e29bf47b50641d77
Added to database: 05/26/2026, 20:58:30 UTC
Last enriched: 08/16/2026, 18:32:20 UTC
Last updated: 09/15/2026, 04:34:04 UTC
Views: 351
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