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OpenAdvisories
Critical USN-8865-1 4 CVEs

edk2 vulnerabilities

Published Oct 5, 2026 · Updated Oct 5, 2026

Ecosystem: Ubuntu

Summary

It was discovered that EDK II incorrectly handled CMS key unwrapping in the
embedded OpenSSL library. An attacker could possibly use this issue to
cause a heap buffer overflow, resulting in a denial of service. This issue
only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu
24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-63072)

It was discovered that EDK II incorrectly handled CMP protection
verification in the embedded OpenSSL library. An attacker could possibly
use this issue to cause a denial of service. This issue only affected
Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-63076)

It was discovered that EDK II incorrectly buffered DTLS records in the
embedded OpenSSL library. A remote attacker could possibly use this issue
to cause EDK II to consume excessive memory, resulting in a denial of
service. (CVE-2026-54874)

It was discovered that EDK II incorrectly verified AEAD tags in the
embedded OpenSSL library. An attacker could possibly use this issue to
cause EDK II to accept forged messages. This issue only affected Ubuntu
24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-75803)

Fixed packages 6

ReleasePackageFixed in
Ubuntu · 22.04 LTS 22.04:LTS edk2 2022.02-3ubuntu0.22.04.7
Ubuntu · 24.04 LTS 24.04:LTS edk2 2024.02-2ubuntu0.10
Ubuntu · 26.04 LTS 26.04:LTS edk2 2025.11-3ubuntu7.3
Ubuntu · Pro 16.04 LTS Pro:16.04:LTS edk2 0~20160408.ffea0a2c-2ubuntu0.2+esm4
Ubuntu · Pro 18.04 LTS Pro:18.04:LTS edk2 0~20180205.c0d9813c-2ubuntu0.3+esm3
Ubuntu · Pro 20.04 LTS Pro:20.04:LTS edk2 0~20191122.bd85bf54-2ubuntu3.6+esm1

Vulnerabilities 4

  • Critical 9.1
    CVE-2026-75803

    AEAD Forgeries with Empty Ciphertext When Using EVP_Cipher()

    Issue summary: ChaCha20-Poly1305 and AES-OCB decryption with an empty ciphertext can report success without verifying the supplied authentication tag when the operation is finalized by calling the EVP_Cipher() function. Impact summary: Applications calling EV…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi
  • High 7.5
    CVE-2026-54874

    Excessive Memory Use Buffering DTLS Records for a Future Epoch

    Issue summary: Receiving a DTLS record for a future epoch while a handshake is in progress causes OpenSSL to buffer far more memory than the record itself requires. Impact summary: A peer can use a small amount of network traffic to make an OpenSSL DTLS endpo…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi
  • High 7.5
    CVE-2026-63072 Public exploit

    Heap Buffer Overflow in CMS Key Unwrapping

    Issue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based on querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive can write and cleanse more bytes than that query reports, causing an 8-byte out-of-bounds heap write. Impa…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi
  • High 7.5
    CVE-2026-63076

    Invalid Pointer Dereference in CMP Server via Crafted protectionAlg

    Issue summary: OpenSSL CMP password based protection verification only checks whether the protectionAlg parameter was not NULL and not its ASN.1 type, before treating it as a PBMParameter. A crafted message can contain a parameter of a different type, which i…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi

References

  • report
    https://ubuntu.com/security/CVE-2026-54874
  • report
    https://ubuntu.com/security/CVE-2026-63072
  • report
    https://ubuntu.com/security/CVE-2026-63076
  • report
    https://ubuntu.com/security/CVE-2026-75803