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CVE-2026-120457 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://hackmd.io/@haindpwn/libaec-se-decode-fs-signedness-oob-read	CISA-ADP
https://github.com/Deutsches-Klimarechenzentrum/libaec/blob/v1.1.7/src/decode.c#L556-L586	[email protected]
https://github.com/Deutsches-Klimarechenzentrum/libaec/issues/64	[email protected]
https://github.com/Deutsches-Klimarechenzentrum/libaec/pull/66	[email protected]
https://github.com/Deutsches-Klimarechenzentrum/libaec/releases/tag/v1.1.7	[email protected]
https://hackmd.io/@haindpwn/libaec-se-decode-fs-signedness-oob-read	[email protected]
https://www.vulncheck.com/advisories/libaec-through-1.1.7-out-of-bounds-read-via-m-se-decode-second-extension-decoder	[email protected]

see all 7 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-196	Unsigned to Signed Conversion Error	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Nov 2, 2026	CVE Modified	CISA-ADP
Nov 2, 2026	New CVE Received	[email protected]