This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-87732 →

DEBIAN-CVE-2026-87732

An issue was discovered in the mirage-crypto package before 2.2.0 for OCaml. The AES.GCM.authenticate_decrypt_into and Chacha20.authenticate_decrypt_i...

Original description

The description as published by the source.

An issue was discovered in the mirage-crypto package before 2.2.0 for OCaml. The AES.GCM.authenticate_decrypt_into and Chacha20.authenticate_decrypt_into functions write the decrypted plaintext into a caller-provided buffer and only then compares the tag. On a forged tag, the functions returns false, but the destination buffer already holds the full plaintext.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 ocaml-mirage-crypto

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 ocaml-mirage-crypto

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 ocaml-mirage-crypto

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.0-1"}]}]

References

advisory security-tracker.debian.org