CVE-2026-120457
libaec through 1.1.7 Out-of-Bounds Read via m_se_decode() Second Extension Decoder
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-196 |
| Vendor | deutsches klimarechenzentrum |
| Product | libaec |
| Published | Nov 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:H Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Affected Versions
Deutsches Klimarechenzentrum / libaec
0 ≤ 1.1.7
References
github.com: https://github.com/Deutsches-Klimarechenzentrum/libaec/issues/64 github.com: https://github.com/Deutsches-Klimarechenzentrum/libaec/pull/66 github.com: https://github.com/Deutsches-Klimarechenzentrum/libaec/blob/v1.1.7/src/decode.c#L556-L586 github.com: https://github.com/Deutsches-Klimarechenzentrum/libaec/releases/tag/v1.1.7 hackmd.io: https://hackmd.io/@haindpwn/libaec-se-decode-fs-signedness-oob-read vulncheck.com: https://www.vulncheck.com/advisories/libaec-through-1.1.7-out-of-bounds-read-via-m-se-decode-second-extension-decoder
Credits
HaiND from the Post and Telecommunication Institute of Technology