[ CVE-2026-120457 · Published 2 Nov 2026 ]
Vulnerability in Deutsches Klimarechenzentrum libaec
CVSS 5.3
EPSS <1%No fix listed yet
[ Why it matters ]Priority signals
- Public proof-of-concept exploit exists (CISA SSVC)
[ Description ]Official 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.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ References ]References
- github.com/Deutsches-Klimarechenzentrum/libaec/blob/v1.1.7/src/decode.c
- github.com/Deutsches-Klimarechenzentrum/libaec/issues/64
- github.com/Deutsches-Klimarechenzentrum/libaec/pull/66
- github.com/Deutsches-Klimarechenzentrum/libaec/releases/tag/v1.1.7
- hackmd.io/@haindpwn/libaec-se-decode-fs-signedness-oob-read
- www.vulncheck.com/advisories/libaec-through-1.1.7-out-of-bounds-read-via-m-se-decode-se…