Medium exploit reference

CVE-2019-1010023 — GNU Libc current is affected by: Re-mapping current loaded libray with malicious ELF file. The...

GNU Libc current is affected by: Re-mapping current loaded library with malicious ELF file. The impact is: In worst case attacker may evaluate privileges. The component is: libld. The attack vector is: Attacker sends 2 ELF files to victim and asks to run ldd on it. ldd execute code. NOTE: Upstream comments indicate "this is being treated as a non-security bug and no real threat.

Published Jul 15, 2019 · Updated Oct 14, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: dwf

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 3.1% (30-day exploitation probability)+13
Technical severity (medium)+3
CISA SSVC: exploitation "poc"+5

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

3.07%

ahead of 87% of scored CVEs · Oct 14, 2026

Affects

Gnu

Glibc

CVSS base

5.4

Medium · 4 source(s)

Prioritization reference: 8.8 provisional

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

Proof of concept

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Gnu Glibc, GNU Libc Glibc).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Exploitation requires user interaction: tighten email/web filtering and warn affected users.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Gnu	Glibc	versions not specified by the source	Vulnerable	NIST National Vulnerability Database
GNU Libc	Glibc	version current (At least as of 2018-02-16)	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

None

User interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
5.4	CVSS 3.1	Medium	2.8	2.5	134c704f-9b21-4f2e-91b3-4a467353bcc0 via NIST National Vulnerability Database
5.4	CVSS 3.1	Medium	—	—	CISA-ADP via CVE Program (cve.org) e CISA ADP
8.8	CVSS 3.0	High	2.8	5.9	nvd@nist.gov via NIST National Vulnerability Database
8.8	CVSS 3.0	High	—	—	GitHub, Inc. via GitHub Security Advisories
6.8	CVSS 2.0	Medium	8.6	6.4	nvd@nist.gov via NIST National Vulnerability Database

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N (score shown at the top: 134c704f-9b21-4f2e-91b3-4a467353bcc0)

Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 8.8 (NVD (NIST)) as a conservative provisional reference — not a definitive official score.

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 3.07%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
Affected products added · gnu libc/glibc
Oct 14, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 14, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 14, 2026
Affected products added · gnu/glibc
Oct 14, 2026 · NIST National Vulnerability Database
CVSS changed · 5.4
Oct 14, 2026 · NIST National Vulnerability Database
Source status changed · → Modified
Oct 14, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 14, 2026 · Alertas do Telegram
2019
CVE published
Jul 15, 2019 · dwf

Source activity

Repeated readings are counted rather than listed.

2× References added · Oct 14, 2026 – Oct 14, 2026
1× Official description updated · Oct 14, 2026 – Oct 14, 2026

References

9 on the record

nvd.nist.gov/vuln/detail/CVE-2019-1010023
GitHub Security Advisories
www.securityfocus.com/bid/109167
Third Party Advisory, VDB Entry, vdb-entry, x_refsource_BID, NIST National Vulnerability Database
support.f5.com/csp/article/K11932200
GitHub Security Advisories
ubuntu.com/security/CVE-2019-1010023
vendor-advisory, x_refsource_UBUNTU, NIST National Vulnerability Database
cert-portal.siemens.com/productcert/html/ssa-398330.html
NIST National Vulnerability Database
security-tracker.debian.org/tracker/CVE-2019-1010023
vendor-advisory, x_refsource_DEBIAN, NIST National Vulnerability Database
support.f5.com/csp/article/K11932200
x_refsource_CONFIRM, NIST National Vulnerability Database
sourceware.org/bugzilla/show_bug.cgi
Exploit, Issue Tracking, Third Party Advisory, x_refsource_MISC, NIST National Vulnerability Database
github.com/advisories/GHSA-x8wp-c333-hv92
GitHub Security Advisories

Elsewhere on this site

Gnu
every CVE for this vendor

Related CVEs (same products)

Medium CVE-2026-6238 Buffer overread in ns_printrrf with corrupted RDATA field Apr 28, 2026
High CVE-2026-5435 Potential buffer overflow in ns_sprintrrf TSIG handling path Apr 28, 2026
High CVE-2026-5928 Potential buffer under-read in ungetwc Apr 20, 2026
Critical CVE-2026-5450 scanf %mc off-by-one heap buffer overflow Apr 20, 2026
High CVE-2026-4046 iconv crash due to assertion failure with untrusted input Mar 30, 2026
Medium CVE-2026-4438 gethostbyaddr and gethostbyaddr_r return invalid DNS hostnames Mar 20, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2019-1010023 is "GNU Libc current is affected by: Re-mapping current loaded libray with malicious ELF file. The...", rated Medium. It affects Glibc (Gnu); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.4 describes technical severity. EPSS 3.07% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

Comments

Moderated technical discussion. Read the community guidelines.

No comments yet.