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.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Deutsches Klimarechenzentrum libaec unaffected
Version Status Constraints
0 affected ≤ 1.1.7

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/Deutsches-Klimarechenzentrum/libaec/blob/v1.1.7/src/decode.c#L556-L586 cve-icon
https://github.com/Deutsches-Klimarechenzentrum/libaec/issues/64 cve-icon
https://github.com/Deutsches-Klimarechenzentrum/libaec/pull/66 cve-icon
https://github.com/Deutsches-Klimarechenzentrum/libaec/releases/tag/v1.1.7 cve-icon
https://hackmd.io/@haindpwn/libaec-se-decode-fs-signedness-oob-read cve-icon
https://www.vulncheck.com/advisories/libaec-through-1.1.7-out-of-bounds-read-via-m-se-decode-second-extension-decoder cve-icon
History

Mon, 02 Nov 2026 14:30:00 +0000

Type Values Removed Values Added
Description 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.
Title libaec through 1.1.7 Out-of-Bounds Read via m_se_decode() Second Extension Decoder
Weaknesses CWE-196
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:H'}

cvssV4_0

{'score': 5.8, '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-02T14:29:13.799Z

Reserved: 2026-11-02T12:42:22.624Z

Link: CVE-2026-120457

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses