OESA-2026-4283

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Source

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-4283

Import Source

https://repo.openeuler.org/security/data/osv/OESA-2026-4283.json

JSON Data

https://api.osv.dev/v1/vulns/OESA-2026-4283

Upstream

CVE-2026-89092

Published

2026-10-16T11:58:55Z

Modified

2026-10-16T12:15:08Z

Severity

4.2 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L CVSS Calculator

Summary

glibc security update

Details

The GNU C Library project provides the core libraries for the GNU system and GNU/Linux systems, as well as many other systems that use Linux as the kernel. These libraries provide critical APIs including ISO C11, POSIX.1-2008, BSD, OS-specific APIs and more. These APIs include such foundational facilities as open, read, write, malloc, printf, getaddrinfo, dlopen, pthread_create, crypt, login, exit and more.

Security Fix(es):

The nscd service in the GNU C Library 2.3.4 onwards may crash due to a stack overflow when a malicious DNS server returns too large a response for a DNS query, resulting in degraded DNS resolution for the system.

Exploitation of this bug needs a system that has nscd enabled and using an untrusted DNS server for name resolution, with the compromised DNS server being capable of processing records large enough to result in a stack overflow in an nscd thread stack. During experimentation, bind 9 was unable to handle large records, but that could change in future or with a different name server. In typical installations, nscd is executed in an isolated context as its own user without a shell, due to which any compromise of that service is isolated.

There is a remote possibility of nscd cache corruption if an attacker manages to get the stack pointer into a desired point in the heap, potentially resulting in other caches in nscd being overwritten with corrupt data through the stack overflow, until the buggy code path eventually results in a crash.

Finally, a crash in nscd may result in performance degradation when resolving names, but it does not result in a denial of service.(CVE-2026-89092)

Database specific

{
    "severity":  "Medium"
}

References

Affected packages

openEuler:24.03-LTS-SP4 / glibc

Package

Name: glibc
Purl: pkg:rpm/openEuler/glibc&distro=openEuler-24.03-LTS-SP4

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

2.38-130.oe2403sp4

Ecosystem specific

{
    "aarch64":  [
        "glibc-2.38-130.oe2403sp4.aarch64.rpm",
        "glibc-all-langpacks-2.38-130.oe2403sp4.aarch64.rpm",
        "glibc-common-2.38-130.oe2403sp4.aarch64.rpm",
        "glibc-debuginfo-2.38-130.oe2403sp4.aarch64.rpm",
        "glibc-debugsource-2.38-130.oe2403sp4.aarch64.rpm",
        "glibc-debugutils-2.38-130.oe2403sp4.aarch64.rpm",
        "glibc-devel-2.38-130.oe2403sp4.aarch64.rpm",
        "glibc-locale-archive-2.38-130.oe2403sp4.aarch64.rpm",
        "glibc-locale-source-2.38-130.oe2403sp4.aarch64.rpm",
        "glibc-nss-devel-2.38-130.oe2403sp4.aarch64.rpm",
        "libnsl-2.38-130.oe2403sp4.aarch64.rpm",
        "nscd-2.38-130.oe2403sp4.aarch64.rpm",
        "nss_modules-2.38-130.oe2403sp4.aarch64.rpm"
    ],
    "noarch":  [
        "glibc-help-2.38-130.oe2403sp4.noarch.rpm"
    ],
    "src":  [
        "glibc-2.38-130.oe2403sp4.src.rpm"
    ],
    "x86_64":  [
        "glibc-2.38-130.oe2403sp4.x86_64.rpm",
        "glibc-all-langpacks-2.38-130.oe2403sp4.x86_64.rpm",
        "glibc-common-2.38-130.oe2403sp4.x86_64.rpm",
        "glibc-debuginfo-2.38-130.oe2403sp4.x86_64.rpm",
        "glibc-debugsource-2.38-130.oe2403sp4.x86_64.rpm",
        "glibc-debugutils-2.38-130.oe2403sp4.x86_64.rpm",
        "glibc-devel-2.38-130.oe2403sp4.x86_64.rpm",
        "glibc-locale-archive-2.38-130.oe2403sp4.x86_64.rpm",
        "glibc-locale-source-2.38-130.oe2403sp4.x86_64.rpm",
        "glibc-nss-devel-2.38-130.oe2403sp4.x86_64.rpm",
        "libnsl-2.38-130.oe2403sp4.x86_64.rpm",
        "nscd-2.38-130.oe2403sp4.x86_64.rpm",
        "nss_modules-2.38-130.oe2403sp4.x86_64.rpm"
    ]
}

Database specific

source

"https://repo.openeuler.org/security/data/osv/OESA-2026-4283.json"