CVE-2026-120457Proof of concept (PoC) published · CISA

libaec through 1.1.7 Out-of-Bounds Read via m_se_decode() Second Extension Decoder

CVSS score

5.8

EPSS probability

—

Risk score

0.6

Published

3 h ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

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Vulnerability description

DayBreach AI Explanation

Verified against sources

CVE-2026-120457: libaec m_se_decode() Out-of-Bounds Read Vulnerability

Sources read

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

libaec through version 1.1.7 contains an out-of-bounds read vulnerability in m_se_decode() within src/decode.c, allowing attackers to bypass signed bounds checks and crash the decoder.

Why does it matter?

This vulnerability allows attackers to leak adjacent memory contents into decoded samples or crash the decoder, impacting data confidentiality and availability.

What should be done?

Review the provided patch references
Follow vendor advisories
Apply available updates

Chain of evidence and sources2 verified claims

libaec 1.1.7 ve önceki sürümler m_se_decode işlevinde sınır dışı okuma zafiyeti içerir.

S0 · daybreach-canonical S1 · cvelist

Zafiyet, özel bir akış kullanılarak imzalı sınır kontrolünün atlanmasına izin verir.

S0 · daybreach-canonical S1 · cvelist

Show the technical text from the sources

libaec through 1.1.7 contains an out-of-bounds read vulnerability in m_se_decode() in src/decode.c that allows attackers to bypass a signed bounds check via an overlong fundamental sequence. Attackers can supply a crafted CCSDS 121.0/SZIP stream with 2^31 or more zero bits to crash the decoder or leak adjacent memory into decoded samples.

CVSS vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

CWE: CWE-196

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-120457 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	Deutsches Klimarechenzentrum	libaec	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
5.8	CVSS V40	MEDIUM	CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD
5.8	CVSS V4_0	MEDIUM	CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N	CVE CNA
5.3	CVSS V31	MEDIUM	CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:H	NVD
5.3	CVSS V3_1	MEDIUM	CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:H	CVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

cvelist

CNA çözüm referansı

Open source

reference

Yama veya çözüm referansı

Open source

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Apply the official update named in the evidence only to the matching product and version.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-120457 is associated with the following CWEs:

CWE-196: Common Weakness Enumeration Entry CWE-196

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-120457 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureYerel erişim

PermissionsGerekmiyor

User—

Official Sources and Advisories

https://github.com/Deutsches-Klimarechenzentrum/libaec/issues/64vendor-advisory https://github.com/Deutsches-Klimarechenzentrum/libaec/pull/66patch https://github.com/Deutsches-Klimarechenzentrum/libaec/blob/v1.1.7/src/decode.c#L556-L586vendor-advisory libaec v1.1.7 Release Notesvendor-advisory https://hackmd.io/@haindpwn/libaec-se-decode-fs-signedness-oob-readvendor-advisory VulnCheck Advisory: libaec through 1.1.7 Out-of-Bounds Read via m_se_decode() Second Extension Decodervendor-advisory

CVSS Vector Radar Chart

5.8 / 10

Vulnerability Scoring Details

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone required

User InteractionP

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)P

Availability (Erişilebilirlik)High

Yama doğrulandı

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

Deutsches Klimarechenzentrum

Weakness Type (CWE & CAPEC)

CWE-196

Get this vulnerability through the API

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