The remote SUSE Linux SLES15 host has a package installed that is affected by a vulnerability as referenced in the SUSE- SU-2026:2621-1 advisory.

    This update for openssl-1_1-livepatches fixes the following issues

    - CVE-2026-45447: Heap Use-After-Free in OpenSSL PKCS7_verify() (bsc#1266357).

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

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

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-25239 advisory.

    - Fix CVE-2026-7383, CVE-2026-9076, CVE-2026-34180, CVE-2026-34181,     CVE-2026-34183, CVE-2026-42764, CVE-2026-42766, CVE-2026-42767, CVE-2026-42768,     CVE-2026-42769, CVE-2026-42770, CVE-2026-45445, CVE-2026-45446, CVE-2026-45447,     CVE-2026-34182.
    Resolves:             RHEL-179274     Resolves:             RHEL-179287     Resolves:             RHEL-179539     Resolves:             RHEL-179544     Resolves:             RHEL-179547     Resolves:             RHEL-179552     Resolves:             RHEL-179556     Resolves:             RHEL-179633     Resolves:             RHEL-179661     Resolves:             RHEL-179678     Resolves:             RHEL-179684     Resolves:             RHEL-179688     Resolves:             RHEL-179691     Resolves:             RHEL-179696     Resolves:             RHEL-179699

Tenable has extracted the preceding description block directly from the Oracle 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 Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-228373a496 advisory.

    Rebase to OpenSSL 3.5.7     Fixes CVE-2026-45447     Fixes CVE-2026-34182     Fixes CVE-2026-34183     Fixes CVE-2026-42764     Fixes CVE-2026-45445     Fixes CVE-2026-7383     Fixes CVE-2026-9076     Fixes CVE-2026-34180     Fixes CVE-2026-34181     Fixes CVE-2026-42766     Fixes CVE-2026-42767     Fixes CVE-2026-42768     Fixes CVE-2026-42769     Fixes CVE-2026-42770     Fixes CVE-2026-45446

Tenable has extracted the preceding description block directly from the Fedora 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 Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:44438 advisory.

    The OpenSSL toolkit provides support for secure communications between machines. This version of OpenSSL     package contains only the libraries from the 1.1.1 version and is provided for compatibility with previous     releases.

    Security Fix(es):

    * openssl: Heap Use-After-Free in OpenSSL PKCS7_verify() (CVE-2026-45447)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

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

The version of Tencent Linux installed on the remote TencentOS Server 2 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0881 advisory.

    Package updates are available for TencentOS Server 2 that fix the following vulnerabilities:

    CVE-2024-5535:
    Issue summary: Calling the OpenSSL API function SSL_select_next_proto with an     empty supported client protocols buffer may cause a crash or memory contents to     be sent to the peer.

    Impact summary: A buffer overread can have a range of potential consequences     such as unexpected application beahviour or a crash. In particular this issue     could result in up to 255 bytes of arbitrary private data from memory being sent     to the peer leading to a loss of confidentiality. However, only applications     that directly call the SSL_select_next_proto function with a 0 length list of     supported client protocols are affected by this issue. This would normally never     be a valid scenario and is typically not under attacker control but may occur by     accident in the case of a configuration or programming error in the calling     application.

    The OpenSSL API function SSL_select_next_proto is typically used by TLS     applications that support ALPN (Application Layer Protocol Negotiation) or NPN     (Next Protocol Negotiation). NPN is older, was never standardised and     is deprecated in favour of ALPN. We believe that ALPN is significantly more     widely deployed than NPN. The SSL_select_next_proto function accepts a list of     protocols from the server and a list of protocols from the client and returns     the first protocol that appears in the server list that also appears in the     client list. In the case of no overlap between the two lists it returns the     first item in the client list. In either case it will signal whether an overlap     between the two lists was found. In the case where SSL_select_next_proto is     called with a zero length client list it fails to notice this condition and     returns the memory immediately following the client list pointer (and reports     that there was no overlap in the lists).

    This function is typically called from a server side application callback for     ALPN or a client side application callback for NPN. In the case of ALPN the list     of protocols supplied by the client is guaranteed by libssl to never be zero in     length. The list of server protocols comes from the application and should never     normally be expected to be of zero length. In this case if the     SSL_select_next_proto function has been called as expected (with the list     supplied by the client passed in the client/client_len parameters), then the     application will not be vulnerable to this issue. If the application has     accidentally been configured with a zero length server list, and has     accidentally passed that zero length server list in the client/client_len     parameters, and has additionally failed to correctly handle a no overlap     response (which would normally result in a handshake failure in ALPN) then it     will be vulnerable to this problem.

    In the case of NPN, the protocol permits the client to opportunistically select     a protocol when there is no overlap. OpenSSL returns the first client protocol     in the no overlap case in support of this. The list of client protocols comes     from the application and should never normally be expected to be of zero length.
    However if the SSL_select_next_proto function is accidentally called with a     client_len of 0 then an invalid memory pointer will be returned instead. If the     application uses this output as the opportunistic protocol then the loss of     confidentiality will occur.

    This issue has been assessed as Low severity because applications are most     likely to be vulnerable if they are using NPN instead of ALPN - but NPN is not     widely used. It also requires an application configuration or programming error.
    Finally, this issue would not typically be under attacker control making active     exploitation unlikely.

    The FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue.

    Due to the low severity of this issue we are not issuing new releases of     OpenSSL at this time. The fix will be included in the next releases when they     become available.

    CVE-2026-28390:
    Issue summary: During processing of a crafted CMS EnvelopedData message     with KeyTransportRecipientInfo a NULL pointer dereference can happen.

    Impact summary: Applications that process attacker-controlled CMS data may     crash before authentication or cryptographic operations occur resulting in     Denial of Service.

    When a CMS EnvelopedData message that uses KeyTransportRecipientInfo with     RSA-OAEP encryption is processed, the optional parameters field of     RSA-OAEP SourceFunc algorithm identifier is examined without checking     for its presence. This results in a NULL pointer dereference if the field     is missing.

    Applications and services that call CMS_decrypt() on untrusted input     (e.g., S/MIME processing or CMS-based protocols) are vulnerable.

    The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this     issue, as the affected code is outside the OpenSSL FIPS module boundary.

    CVE-2026-45447:
    Issue summary: A specially crafted PKCS#7 or S/MIME signed message could     trigger a use-after-free during PKCS#7 signature verification.

    Impact summary: A use-after-free may result in process crashes, heap     corruption, or potentially remote code execution.

    When processing a PKCS#7 or S/MIME signed message, if the SignedData     digestAlgorithms field is present as an empty ASN.1 SET, OpenSSL may     incorrectly free a caller-owned BIO during PKCS7_verify(). A subsequent     use of the BIO by the calling application results in a use-after-free     condition.

    In the common case this occurs when the application later calls     BIO_free() on the BIO originally passed to PKCS7_verify(). Depending     on allocator behavior and application-specific BIO usage patterns, this     may result in a crash or other memory corruption. In some application     contexts this may potentially be exploitable for remote code execution.

    Applications that process PKCS#7 or S/MIME signed messages using OpenSSL     PKCS#7 APIs may be affected. Applications using the CMS APIs for this     processing are not affected.

    The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this     issue, as the affected code is outside the OpenSSL FIPS module boundary.

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 SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2399-1 advisory.

    This update for openssl-1_0_0 fixes the following issues

    - CVE-2026-7383: Possible Heap Buffer Overflow in ASN.1 Multibyte String Conversion (bsc#1266340).
    - CVE-2026-9076: Out-of-Bounds Read in CMS Password-Based Decryption (bsc#1266341).
    - CVE-2026-28388: NULL Pointer Dereference When Processing a Delta CRL (bsc#1260442).
    - CVE-2026-28389: Possible NULL dereference when processing CMS KeyAgreeRecipientInfo (bsc#1260443).
    - CVE-2026-34180: Heap Buffer Over-read in ASN.1 Content Parsing (bsc#1266342).
    - CVE-2026-42766: Possible NULL Dereference in Password-Based CMS Decryption (bsc#1266349).
    - CVE-2026-45447: Heap Use-After-Free in OpenSSL PKCS7_verify() (bsc#1266357).
    - NULL pointer dereference when processing an OCSP response (bsc#1260446).

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.

ID	Name	Product	Family	Published	Updated	Severity
322914	SUSE SLES15 Security Update : openssl-1_1-livepatches (SUSE-SU-2026:2621-1)	Nessus	SuSE Local Security Checks	6/26/2026	7/2/2026	high
322996	Oracle Linux 9 : openssl (ELSA-2026-25239)	Nessus	Oracle Linux Local Security Checks	6/26/2026	6/26/2026	critical
320770	Fedora 44 : openssl (2026-228373a496)	Nessus	Fedora Local Security Checks	6/12/2026	6/12/2026	critical
329231	RHEL 9 : compat-openssl11 (RHSA-2026:44438)	Nessus	Red Hat Local Security Checks	7/23/2026	7/29/2026	high
340976	TencentOS Server 2: openssl (TSSA-2026:0881)	Nessus	Tencent Local Security Checks	8/26/2026	8/26/2026	high
321676	SUSE SLES15 Security Update : openssl-1_0_0 (SUSE-SU-2026:2399-1)	Nessus	SuSE Local Security Checks	6/20/2026	6/20/2026	high

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