Vulnerability record/PUBLISHED/Published Nov 2, 2026 14:29:13 UTC

CVE-2026-120457

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.

Base score5.8/ 10

SeverityMediumCVSS 4.0

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes

Base severityMedium

Attack vectorLocalAV

Attack complexityLowAC

Attack requirementsPresentAT

Privileges requiredNonePR

User interactionPassiveUI

Vulnerable system confidentialityLowVC

Vulnerable system integrityNoneVI

Vulnerable system availabilityHighVA

Subsequent system confidentialityNoneSC

Subsequent system integrityNoneSI

Subsequent system availabilityNoneSA

CVSS vector stringCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering AuthorityVulnCheck

Last updatedNov 2, 2026 15:46:06 UTC

PublishedNov 2, 2026 14:29:13 UTC

ReservedNov 2, 2026 12:42:22 UTC

Credits

HaiND from the Post and Telecommunication Institute of Technology