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CVE-2025-4802· NVD / CVE Program· CNA glibc

Untrusted LD_LIBRARY_PATH environment variable vulnerability in the GNU C Library version 2.27 to 2.38 allows attacker controlled loading of

Noroxi assessment

Priority: Monitor (action score 31/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.59% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: azl3 glibc 2.38-12 on Azure Linux 3.0 2.38-12; cbl2 glibc 2.35-10 2.35-8; cbl2 glibc 2.35-10 on CBL Mariner 2.0 2.35-8.

Low priority for now. Upgrade to azl3 glibc 2.38-12 on Azure Linux 3.0 2.38-12; cbl2 glibc 2.35-10 2.35-8; cbl2 glibc 2.35-10 on CBL Mariner 2.0 2.35-8 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Untrusted LD_LIBRARY_PATH environment variable vulnerability in the GNU C Library version 2.27 to 2.38 allows attacker controlled loading of dynamically shared library in statically compiled setuid binaries that call dlopen (including internal dlopen calls after setlocale or calls to NSS functions such as getaddrinfo).

HighCVSS 7.8 · v3.1—Proof of concept Fix available
Published
May 16, 2025
Updated
Jun 17, 2026
EPSS
0.6% · 47th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-4802

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
gnuglibc

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • gnu glibc2.27 and later · up to 2.38 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (glibc). Independent of NVD's CPE analysis and usually ahead of it.

  • The GNU C Library glibc

    • 2.27 and later · before 2.39affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8compat-libpthread-nonsharedbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibcbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-all-langpacksbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-benchtestsbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-commonbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-develbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-docbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-gconv-extrabefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-headersbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-aabefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-afbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-agrbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-akbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-ambefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-anbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-anpbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-arbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-asbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-astbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-aycbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-azbefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-bebefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-bembefore 2.28-251.el8_10.222.28-251.el8_10.22
AlmaLinux:8glibc-langpack-berbefore 2.28-251.el8_10.222.28-251.el8_10.22

+96

Same product

gnu: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-4911Glibc: buffer overflow in ld.so leading to privilege escalationKEV
    80Now
  • CVE-2015-0235Heap-based buffer overflow in the __nss_hostname_digits_dots function in glibc 2.2, and other 2.x versions before 2.18, allows context-depen
    68This week
  • CVE-2015-7547Multiple stack-based buffer overflows in the (1) send_dg and (2) send_vc functions in the libresolv library in the GNU C Library (aka glibc
    59Plan
  • CVE-2024-2961The iconv() function in the GNU C Library versions 2.39 and older may overflow the output buffer passed to it by up to 4 bytes when converti
    55Plan
  • CVE-2018-11236stdlib/canonicalize.c in the GNU C Library (aka glibc or libc6) 2.27 and earlier, when processing very long pathname arguments to the realpa
    41Plan
  • CVE-2015-8779Stack-based buffer overflow in the catopen function in the GNU C Library (aka glibc or libc6) before 2.23 allows context-dependent attackers
    41Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 glibc 2.38-12 on Azure Linux 3.02.38-12 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 glibc 2.35-102.35-8 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 glibc 2.35-10 on CBL Mariner 2.02.35-8 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 glibc 2.35-10 on CBL-Mariner 2.02.35-8 · Release NotesMicrosoft (MSRC)
cbl2 glibc 2.35-7 on CBL Mariner 2.02.35-8 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 glibc 2.35-9 on CBL Mariner 2.02.35-8 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:glibc2.34-168.el9_6.19 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-all-langpacks2.34-168.el9_6.19 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-benchtests2.34-168.el9_6.19 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-common2.34-168.el9_6.19 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-devel2.34-168.el9_6.19 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-doc2.34-168.el9_6.19 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-gconv-extra2.34-168.el9_6.19 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-headers2.34-168.el9_6.19 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-langpack-aa2.34-168.el9_6.19 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-langpack-af2.34-168.el9_6.19 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-langpack-agr2.34-168.el9_6.19 · AlmaLinux:9Package registry (OSV)
almalinux:glibc-langpack-ak2.34-168.el9_6.19 · AlmaLinux:9Package registry (OSV)
debian:glibc2.36-9+deb12u11 · Debian:12Package registry (OSV)
opensuse:glibc2.38-150600.14.32.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:kumactl2.12.3-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:glibc0:2.17-326.el7_9.5 · Red Hat:rhel_els:7Package registry (OSV)
red hat:glibc-benchtests-debuginfo0:2.34-168.el9_6.19 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:glibc-common0:2.17-326.el7_9.5 · Red Hat:rhel_els:7Package registry (OSV)
red hat:glibc-common-debuginfo0:2.34-168.el9_6.19 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:glibc-debuginfo0:2.17-326.el7_9.5 · Red Hat:rhel_els:7Package registry (OSV)
red hat:glibc-debuginfo-common0:2.17-326.el7_9.5 · Red Hat:rhel_els:7Package registry (OSV)
red hat:glibc-debugsource0:2.34-168.el9_6.19 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:glibc-devel0:2.17-326.el7_9.5 · Red Hat:rhel_els:7Package registry (OSV)
red hat:glibc-headers0:2.17-326.el7_9.5 · Red Hat:rhel_els:7Package registry (OSV)

+5

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:22026-01-09

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+237 d
  3. TodayOct 13, 2026+515 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-426 · Untrusted Search Path

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records