OESA-2026-4154

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Source

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-4154

Import Source

https://repo.openeuler.org/security/data/osv/OESA-2026-4154.json

JSON Data

https://api.osv.dev/v1/vulns/OESA-2026-4154

Upstream

CVE (2)

Published

2026-09-30T13:47:07Z

Modified

2026-10-01T02:00:03Z

Severity

6.3 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/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):

A time-of-check to time-of-use (TOCTOU) race condition in the dynamic loader (ld.so) of the GNU C Library (glibc) versions 2.14 through 2.44 allows a local attacker to escalate privileges. When expanding $ORIGIN in DT_RPATH for setuid/setgid (AT_SECURE) programs, glibc validates the lexically normalized search path against the trusted directories but then opens the raw, un-normalized path. On systems where the Linux fs.protected_hardlinks sysctl is disabled, a local attacker who hard-links such a program into an attacker-controlled directory and wins a race to replace an intermediate path component with a symbolic link can direct the loader outside the trusted directory, causing it to load an attacker-controlled shared object and execute arbitrary code with the elevated privileges of the program.

Exploitation requires an installed setuid or setgid binary whose DT_RPATH uses $ORIGIN followed by ".." traversal that normalizes into a trusted directory, and the ability to hard-link that binary and win the race by swapping a path component for a symbolic link. Major Linux-based OS distributions ship with fs.protected_hardlinks enabled by default and mitigate the vulnerability.(CVE-2026-86805)

A stack-based buffer overflow in the dynamic loader (ld.so) of the GNU C Library (glibc) versions 2.14 through 2.44 allows a local attacker to crash or corrupt the memory of setuid/setgid (AT_SECURE) programs.

When such a program's DT_RPATH or DT_RUNPATH begins with $ORIGIN and is followed by NUL or '/' the loader both reads past the end of the path buffer and writes past the end of a stack-allocated internal buffer. The corrupted loader stack can lead to a loader crash (denial of service) and limited disclosure of process memory.(CVE-2026-95818)

Database specific

{
    "severity": "Medium"
}

References

Affected packages

openEuler:24.03-LTS-SP3 / glibc

Package

Name: glibc
Purl: pkg:rpm/openEuler/glibc&distro=openEuler-24.03-LTS-SP3

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

2.38-128.oe2403sp3

Ecosystem specific

{
    "aarch64": [
        "glibc-2.38-128.oe2403sp3.aarch64.rpm",
        "glibc-all-langpacks-2.38-128.oe2403sp3.aarch64.rpm",
        "glibc-common-2.38-128.oe2403sp3.aarch64.rpm",
        "glibc-debuginfo-2.38-128.oe2403sp3.aarch64.rpm",
        "glibc-debugsource-2.38-128.oe2403sp3.aarch64.rpm",
        "glibc-debugutils-2.38-128.oe2403sp3.aarch64.rpm",
        "glibc-devel-2.38-128.oe2403sp3.aarch64.rpm",
        "glibc-locale-archive-2.38-128.oe2403sp3.aarch64.rpm",
        "glibc-locale-source-2.38-128.oe2403sp3.aarch64.rpm",
        "glibc-nss-devel-2.38-128.oe2403sp3.aarch64.rpm",
        "libnsl-2.38-128.oe2403sp3.aarch64.rpm",
        "nscd-2.38-128.oe2403sp3.aarch64.rpm",
        "nss_modules-2.38-128.oe2403sp3.aarch64.rpm"
    ],
    "noarch": [
        "glibc-help-2.38-128.oe2403sp3.noarch.rpm"
    ],
    "src": [
        "glibc-2.38-128.oe2403sp3.src.rpm"
    ],
    "x86_64": [
        "glibc-2.38-128.oe2403sp3.x86_64.rpm",
        "glibc-all-langpacks-2.38-128.oe2403sp3.x86_64.rpm",
        "glibc-common-2.38-128.oe2403sp3.x86_64.rpm",
        "glibc-debuginfo-2.38-128.oe2403sp3.x86_64.rpm",
        "glibc-debugsource-2.38-128.oe2403sp3.x86_64.rpm",
        "glibc-debugutils-2.38-128.oe2403sp3.x86_64.rpm",
        "glibc-devel-2.38-128.oe2403sp3.x86_64.rpm",
        "glibc-locale-archive-2.38-128.oe2403sp3.x86_64.rpm",
        "glibc-locale-source-2.38-128.oe2403sp3.x86_64.rpm",
        "glibc-nss-devel-2.38-128.oe2403sp3.x86_64.rpm",
        "libnsl-2.38-128.oe2403sp3.x86_64.rpm",
        "nscd-2.38-128.oe2403sp3.x86_64.rpm",
        "nss_modules-2.38-128.oe2403sp3.x86_64.rpm"
    ]
}

Database specific

source

"https://repo.openeuler.org/security/data/osv/OESA-2026-4154.json"