CVE-2026-120457
libaec through 1.1.7 Out-of-Bounds Read via m_se_decode() Second Extension Decoder
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| libaec Deutsches Klimarechenzentrum |
≥ 0; ≤ 1.1.7 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.8 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 | CNA: VulnCheck |
| 3.1 / 5.3 medium |
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:H | CNA: VulnCheck |
Exploit evidence
- https://hackmd.io/@haindpwn/libaec-se-decode-fs-signedness-oob-read
exploit · ADP: CISA-ADP
References
- https://github.com/Deutsches-Klimarechenzentrum/libaec/issues/64CNA: VulnCheck · issue-tracking
- https://github.com/Deutsches-Klimarechenzentrum/libaec/pull/66CNA: VulnCheck · issue-tracking, patch
- https://github.com/Deutsches-Klimarechenzentrum/libaec/blob/v1.1.7/src/decode.c#L556-L586CNA: VulnCheck · technical-description
- https://github.com/Deutsches-Klimarechenzentrum/libaec/releases/tag/v1.1.7CNA: VulnCheck · release-notes
- https://hackmd.io/@haindpwn/libaec-se-decode-fs-signedness-oob-readCNA: VulnCheck · technical-description
- https://www.vulncheck.com/advisories/libaec-through-1.1.7-out-of-bounds-read-via-m-se-decode-second-extension-decoderCNA: VulnCheck · third-party-advisory
- https://hackmd.io/@haindpwn/libaec-se-decode-fs-signedness-oob-readADP: CISA-ADP · exploit
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