glibc security update
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.
OESA-2026-4152
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:OESA-2026-4152
glibc
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 2.34-186.oe2203sp4
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.34-186.oe2203sp4"
}
]
}
],
"package": {
"name": "glibc",
"purl": "pkg:rpm/openEuler/glibc&distro=openEuler-22.03-LTS-SP4",
"ecosystem": "openEuler:22.03-LTS-SP4"
},
"database_specific": {
"source": "https://repo.openeuler.org/security/data/osv/OESA-2026-4152.json"
},
"ecosystem_specific": {
"src": [
"glibc-2.34-186.oe2203sp4.src.rpm"
],
"noarch": [
"glibc-help-2.34-186.oe2203sp4.noarch.rpm"
],
"x86_64": [
"glibc-2.34-186.oe2203sp4.x86_64.rpm",
"glibc-all-langpacks-2.34-186.oe2203sp4.x86_64.rpm",
"glibc-common-2.34-186.oe2203sp4.x86_64.rpm",
"glibc-compat-2.17-2.34-186.oe2203sp4.x86_64.rpm",
"glibc-debuginfo-2.34-186.oe2203sp4.x86_64.rpm",
"glibc-debugsource-2.34-186.oe2203sp4.x86_64.rpm",
"glibc-debugutils-2.34-186.oe2203sp4.x86_64.rpm",
"glibc-devel-2.34-186.oe2203sp4.x86_64.rpm",
"glibc-locale-archive-2.34-186.oe2203sp4.x86_64.rpm",
"glibc-locale-source-2.34-186.oe2203sp4.x86_64.rpm",
"glibc-nss-devel-2.34-186.oe2203sp4.x86_64.rpm",
"libnsl-2.34-186.oe2203sp4.x86_64.rpm",
"nscd-2.34-186.oe2203sp4.x86_64.rpm",
"nss_modules-2.34-186.oe2203sp4.x86_64.rpm"
],
"aarch64": [
"glibc-2.34-186.oe2203sp4.aarch64.rpm",
"glibc-all-langpacks-2.34-186.oe2203sp4.aarch64.rpm",
"glibc-common-2.34-186.oe2203sp4.aarch64.rpm",
"glibc-compat-2.17-2.34-186.oe2203sp4.aarch64.rpm",
"glibc-debuginfo-2.34-186.oe2203sp4.aarch64.rpm",
"glibc-debugsource-2.34-186.oe2203sp4.aarch64.rpm",
"glibc-debugutils-2.34-186.oe2203sp4.aarch64.rpm",
"glibc-devel-2.34-186.oe2203sp4.aarch64.rpm",
"glibc-locale-archive-2.34-186.oe2203sp4.aarch64.rpm",
"glibc-locale-source-2.34-186.oe2203sp4.aarch64.rpm",
"glibc-nss-devel-2.34-186.oe2203sp4.aarch64.rpm",
"libnsl-2.34-186.oe2203sp4.aarch64.rpm",
"nscd-2.34-186.oe2203sp4.aarch64.rpm",
"nss_modules-2.34-186.oe2203sp4.aarch64.rpm"
]
}
}
]Publisher severity
medium
Source reference: /database_specific/severity
- Event
- #52082 · Revision 1
- Added to Heist Feed
- Publisher date