In Bouncy Castle for Java before 1.85, OpenPGP CFB quick-check oracle active on symmetric/session-key paths. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 1.0.13 (1.0.X series), 2.0.13 (2.0.X series) and 2.1.13 (2.1.X series).

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0825 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2026-59640:
    In Bouncy Castle for Java before 1.85, OpenPGP CFB quick-check oracle active on symmetric/session-key     paths. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS     (BC-FJA) before bcpg-fips 1.0.13 (1.0.X series), 2.0.13 (2.0.X series) and 2.1.13 (2.1.X series).

    CVE-2026-58061:
    In Bouncy Castle for Java before 1.85, CCM-family modes write plaintext to caller buffer before tag check.
    This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-     FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3559-1 advisory.

    - CVE-2026-8763: Name Constraints bypass via trailing dot in rfc822Name and URI (bsc#1272700).
    - CVE-2026-12185: BKS/UBER keystore allocates from untrusted lengths before integrity check (bsc#1272701).
    - CVE-2026-12802: CMS AuthEnvelopedData fails to enforce tag-length on decryption (bsc#1272702).
    - CVE-2026-12803: KCCMBlockCipher MAC does not bind nonce when AAD is absent (bsc#1272703).
    - CVE-2026-12816: IESEngine stream-mode MAC forgery via length-dependent KDF split (bsc#1272704).
    - CVE-2026-12817: OpenPGP AEAD decryption skips final tag on chunk-aligned data (bsc#1272705).
    - CVE-2026-12852: MLS wire decoder allocates attacker-declared opaque length before bounds check     (bsc#1272707).
    - CVE-2026-12860: RSA PKCS#1 verification skips last two hash bytes in NULL-omitted path (bsc#1272708).
    - CVE-2026-13506: Lazy ASN.1 sequence forcing resets nesting-depth guard (bsc#1272709).
    - CVE-2026-13586: PKCS#12 MAC and bag-decryption KDF iteration-count bound (bsc#1272710).
    - CVE-2026-14682: Possible OOM from unbounded up-front allocation on a definite-length read (bsc#1272711).
    - CVE-2026-15055: PKCS#8 / PBES2 decryptors honour unbounded KDF cost from input (bsc#1272712).
    - CVE-2026-58059: Quadratic-time escaping when stringifying X.500 distinguished names (bsc#1272713).
    - CVE-2026-58060: HSS public-key level count unbounded, enabling huge allocation on verify (bsc#1272714).
    - CVE-2026-58061: CCM-family modes write plaintext to caller buffer before tag check (bsc#1272715).
    - CVE-2026-58062: Stapled OCSP response accepted without binding to the checked certificate (bsc#1272716).
    - CVE-2026-58063: BCFKS keystore load honours unbounded KDF cost from untrusted file (bsc#1272717).
    - CVE-2026-59638: JSSE hostname verifier CN-fallback enabled by default despite documented opt-in     (bsc#1272718).
    - CVE-2026-59639: CMS verifySignatures returns true for SignedData with zero signers (bsc#1272719).
    - CVE-2026-59640: OpenPGP CFB quick-check oracle active on symmetric/session-key paths (bsc#1272720).
    - CVE-2026-59641: S/MIME validator trusts signer-asserted signingTime for path validation (bsc#1272721).
    - CVE-2026-59642: CMS AuthenticatedData content not bound to MAC when authAttrs present (bsc#1272722).
    - CVE-2026-59643: OpenPGP inline-signature policy failures silently ignored (bsc#1272723).
    - CVE-2026-59644: MLS hash-ratchet honours arbitrary 32-bit generation counter from sender (bsc#1272724).
    - CVE-2026-59645: OER parser recurses without depth limit on self-referential IEEE 1609.2 schema     (bsc#1272725).
    - CVE-2026-59646: DTLS handshake reassembler allocates buffer from unchecked 24-bit length (bsc#1272726).
    - CVE-2026-59647: CRMF/CMP password-MAC honours unbounded iteration count (bsc#1272727).
    - CVE-2026-59648: OpenPGP Argon2 S2K honours attacker-chosen memory and passes (bsc#1272728).
    - CVE-2026-59649: OpenPGP user-attribute subpacket length bounded only by JVM max memory (bsc#1272729).
    - CVE-2026-59650: MTI/A0 DH agreement exponentiates unvalidated peer value (bsc#1272730).
    - CVE-2026-59651: BKS keystore accepts legacy version with 16-bit integrity MAC key (bsc#1272731).
    - CVE-2026-59652: LDAP filter injection in legacy jdk1.4 LDAPStoreHelper (bsc#1272732).

    Changes for bouncycastle:

    Update to 1.85:

      * Additional Notes:

      The standardised PQC algorithms ML-KEM, ML-DSA, SLH-DSA, FrodoKEM,       and CMCE have been repackaged under org.bouncycastle.crypto and       the versions under org.bouncycastle.crypto.pqc have been deprecated.
      These deprecated versions will be removed in BC 1.86.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21538-1 advisory.

    Update to 1.85.

    Security issues fixed:

    - CVE-2026-8763: Name Constraints bypass via trailing dot in rfc822Name and URI (bsc#1272700).
    - CVE-2026-12185: BKS/UBER keystore allocates from untrusted lengths before integrity check (bsc#1272701).
    - CVE-2026-12802: CMS AuthEnvelopedData fails to enforce tag-length on decryption (bsc#1272702).
    - CVE-2026-12803: KCCMBlockCipher MAC does not bind nonce when AAD is absent (bsc#1272703).
    - CVE-2026-12816: IESEngine stream-mode MAC forgery via length-dependent KDF split (bsc#1272704).
    - CVE-2026-12817: OpenPGP AEAD decryption skips final tag on chunk-aligned data (bsc#1272705).
    - CVE-2026-12852: MLS wire decoder allocates attacker-declared opaque length before bounds check     (bsc#1272707).
    - CVE-2026-12860: RSA PKCS#1 verification skips last two hash bytes in NULL-omitted path (bsc#1272708).
    - CVE-2026-13506: Lazy ASN.1 sequence forcing resets nesting-depth guard (bsc#1272709).
    - CVE-2026-13586: PKCS#12 MAC and bag-decryption KDF iteration-count bound (bsc#1272710).
    - CVE-2026-14682: Possible OOM from unbounded up-front allocation on a definite-length read (bsc#1272711).
    - CVE-2026-15055: PKCS#8 / PBES2 decryptors honour unbounded KDF cost from input (bsc#1272712).
    - CVE-2026-58059: Quadratic-time escaping when stringifying X.500 distinguished names (bsc#1272713).
    - CVE-2026-58060: HSS public-key level count unbounded, enabling huge allocation on verify (bsc#1272714).
    - CVE-2026-58061: CCM-family modes write plaintext to caller buffer before tag check (bsc#1272715).
    - CVE-2026-58062: Stapled OCSP response accepted without binding to the checked certificate (bsc#1272716).
    - CVE-2026-58063: BCFKS keystore load honours unbounded KDF cost from untrusted file (bsc#1272717).
    - CVE-2026-59638: JSSE hostname verifier CN-fallback enabled by default despite documented opt-in     (bsc#1272718).
    - CVE-2026-59639: CMS verifySignatures returns true for SignedData with zero signers (bsc#1272719).
    - CVE-2026-59640: OpenPGP CFB quick-check oracle active on symmetric/session-key paths (bsc#1272720).
    - CVE-2026-59641: S/MIME validator trusts signer-asserted signingTime for path validation (bsc#1272721).
    - CVE-2026-59642: CMS AuthenticatedData content not bound to MAC when authAttrs present (bsc#1272722).
    - CVE-2026-59643: OpenPGP inline-signature policy failures silently ignored (bsc#1272723).
    - CVE-2026-59644: MLS hash-ratchet honours arbitrary 32-bit generation counter from sender (bsc#1272724).
    - CVE-2026-59645: OER parser recurses without depth limit on self-referential IEEE 1609.2 schema     (bsc#1272725).
    - CVE-2026-59646: DTLS handshake reassembler allocates buffer from unchecked 24-bit length (bsc#1272726).
    - CVE-2026-59647: CRMF/CMP password-MAC honours unbounded iteration count (bsc#1272727).
    - CVE-2026-59648: OpenPGP Argon2 S2K honours attacker-chosen memory and passes (bsc#1272728).
    - CVE-2026-59649: OpenPGP user-attribute subpacket length bounded only by JVM max memory (bsc#1272729).
    - CVE-2026-59650: MTI/A0 DH agreement exponentiates unvalidated peer value (bsc#1272730).
    - CVE-2026-59651: BKS keystore accepts legacy version with 16-bit integrity MAC key (bsc#1272731).
    - CVE-2026-59652: LDAP filter injection in legacy jdk1.4 LDAPStoreHelper (bsc#1272732).

    Additional notes:

    - The standardised PQC algorithms ML-KEM, ML-DSA, SLH-DSA, FrodoKEM, and CMCE have been repackaged under       `org.bouncycastle.crypto` and the versions under `org.bouncycastle.crypto.pqc` have been deprecated.
    These deprecated       versions will be removed in BC 1.86.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - In Bouncy Castle for Java before 1.85, OpenPGP CFB quick-check oracle active on symmetric/session-key     paths. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS     (BC-FJA) before bcpg-fips 1.0.13 (1.0.X series), 2.0.13 (2.0.X series) and 2.1.13 (2.1.X series).
    (CVE-2026-59640)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
334831	TencentOS Server 4: bouncycastle (TSSA-2026:0825)	Nessus	Tencent Local Security Checks	Local	high
334719	SUSE SLED15: bouncycastle / bouncycastle-pg / bouncycastle-pkix / etc (SUSE-SU-2026:3559-1)	Nessus	SuSE Local Security Checks	Local	critical
333511	openSUSE 16: bouncycastle / bouncycastle-javadoc / bouncycastle-jmail / etc (openSUSE-SU-2026:21538-1)	Nessus	SuSE Local Security Checks	Local	critical
331774	Linux Distros Unpatched Vulnerability : CVE-2026-59640	Nessus	Misc.	Local	high

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CVE-2026-59640

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Tenable Plugins

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