CVE-2026-120458

Description

Kvazaar through 2.3.2 contains an infinite loop vulnerability in read_header() in src/encmain.c that allows attackers to hang the command-line encoder by supplying a truncated Y4M header. Attackers can provide a crafted .y4m file lacking a terminating newline, causing unchecked EOF reads that hang the process indefinitely while consuming a full CPU core.

References

• https://github.com/ultravideo/kvazaar/blob/v2.3.2/src/encmain.c#L339-L357
• https://github.com/ultravideo/kvazaar/commit/8a2f109be283e87008c679d635966cc034da39c6
• https://github.com/ultravideo/kvazaar/issues/452
• https://github.com/ultravideo/kvazaar/releases/tag/v2.3.2
• https://hackmd.io/@haindpwn/kvazaar-y4m-header-missing-newline-infinite-loop