CVE-2026-120457: medium-severity vulnerability in Deutsches Klimarechenzentrum libaec
libaec through 1.1.7 Out-of-Bounds Read via m_se_decode() Second Extension Decoder
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.8epss 0.2%
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:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
Deutsches Klimarechenzentrum · libaecReferences
https://github.com/Deutsches-Klimarechenzentrum/libaec/blob/v1.1.7/src/decode.c#L556-L586https://github.com/Deutsches-Klimarechenzentrum/libaec/issues/64https://github.com/Deutsches-Klimarechenzentrum/libaec/pull/66https://github.com/Deutsches-Klimarechenzentrum/libaec/releases/tag/v1.1.7https://hackmd.io/@haindpwn/libaec-se-decode-fs-signedness-oob-readhttps://www.vulncheck.com/advisories/libaec-through-1.1.7-out-of-bounds-read-via-m-se-decode-second-extension-decoder