A flaw was found in p11-kit. A remote attacker could exploit this vulnerability by calling the C_DeriveKey function on a remote token with specific IBM kyber or IBM btc derive mechanism parameters set to NULL. This could lead to the RPC-client attempting to return an uninitialized value, potentially resulting in a NULL dereference or undefined behavior. This issue may cause an application level denial of service or other unpredictable system states.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - A flaw was found in p11-kit. A remote attacker could exploit this vulnerability by calling the C_DeriveKey
    function on a remote token with specific IBM kyber or IBM btc derive mechanism parameters set to NULL.
    This could lead to the RPC-client attempting to return an uninitialized value, potentially resulting in a
    NULL dereference or undefined behavior. This issue may cause an application level denial of service or
    other unpredictable system states. (CVE-2026-2100)

The Rocky Linux 9 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-2026_18599 advisory.

    * p11-kit: p11-kit: NULL dereference via C_DeriveKey with specific NULL parameters (CVE-2026-2100)

Tenable has extracted the preceding description block directly from the CIQ 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 Rocky Linux 10.2 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-2026_18143 advisory.

    * p11-kit: p11-kit: NULL dereference via C_DeriveKey with specific NULL parameters (CVE-2026-2100)

Tenable has extracted the preceding description block directly from the CIQ 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 AOS installed on the remote host is prior to 7.6. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AOS-7.6 advisory.

  - NLnet Labs Unbound 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator     that enables denial of service and possible remote code execution as a result of deep copying a data     structure and erroneously overwriting a destination pointer. An adversary can exploit the vulnerability by     controlling a malicious signed zone and querying a vulnerable Unbound. When DS sub-queries need to suspend     validation due to NSEC3 computational budget exhaustion (introduced in Unbound 1.19.1), Unbound deep-     copies response messages to preserve them across memory region teardown. A struct-assignment bug     overwrites the destination's pointer with the source's pointer. After the sub-query region is freed, the     resumed validator dereferences this dangling pointer, triggering a crash or potentially enabling arbitrary     code execution. Unbound 1.25.1 contains a patch with a fix to preserve the correct pointer when deep     copying the data structure. (CVE-2026-33278)

  - A vulnerability has been found in GNU Binutils 2.45. The affected element is the function elf_swap_shdr in     the library bfd/elfcode.h of the component Linker. The manipulation leads to heap-based buffer overflow.
    The attack must be carried out locally. The exploit has been disclosed to the public and may be used. The     identifier of the patch is 9ca499644a21ceb3f946d1c179c38a83be084490. To fix this issue, it is recommended     to deploy a patch. The code maintainer replied with [f]ixed for 2.46. (CVE-2025-11083)

  - A heap-based buffer overflow problem was found in glib through an incorrect calculation of buffer size in     the g_escape_uri_string() function. If the string to escape contains a very large number of unacceptable     characters (which would need escaping), the calculation of the length of the escaped string could     overflow, leading to a potential write off the end of the newly allocated string. (CVE-2025-13601)

  - A flaw was found in grub2. The calculation of the translation buffer when reading a language .mo file in     grub_gettext_getstr_from_position() may overflow, leading to a Out-of-bound write. This issue can be     leveraged by an attacker to overwrite grub2's sensitive heap data, eventually leading to the circumvention     of secure boot protections. (CVE-2024-45777)

  - In Sudo through 1.9.17p2 before 3e474c2, a failure of a setuid, setgid, or setgroups call, during a     privilege drop before running the mailer, is not a fatal error and can lead to privilege escalation.
    (CVE-2026-35535)

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

The remote Oracle Linux 10 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-18143 advisory.

    [0.26.2-1]
    - Rebase to 0.26.2

    [0.26.1-1]
    - Rebase to 0.26.1

    [0.25.10-1]
    - Rebase to 0.25.10

    [0.25.9-1]
    - Rebase to 0.25.9

Tenable has extracted the preceding description block directly from the Oracle 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 remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-18599 advisory.

    [0.26.2-1]
    - Rebase to 0.26.2       Resolves: RHEL-147825

    [0.26.1-1]
    - Rebase to 0.26.1       Resolves: RHEL-139075, RHEL-118361, RHEL-126132

    [0.25.10-1]
    - Update to new upstream release 0.25.10       Resolves: RHEL-115453

Tenable has extracted the preceding description block directly from the Oracle 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 remote RockyLinux 10 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:18143 advisory.

    * p11-kit: p11-kit: NULL dereference via C_DeriveKey with specific NULL parameters (CVE-2026-2100)

Tenable has extracted the preceding description block directly from the RockyLinux 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 RockyLinux 9 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:18599 advisory.

    * p11-kit: p11-kit: NULL dereference via C_DeriveKey with specific NULL parameters (CVE-2026-2100)

Tenable has extracted the preceding description block directly from the RockyLinux 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 Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:18599 advisory.

    The p11-kit packages provide a mechanism to manage PKCS#11 modules. The p11-kit-trust subpackage includes     a PKCS#11 trust module that provides certificate anchors and black lists based on configuration files.

    Security Fix(es):

    * p11-kit: p11-kit: NULL dereference via C_DeriveKey with specific NULL parameters (CVE-2026-2100)

    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.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 9 Release Notes     linked from 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 remote Redhat Enterprise Linux 10 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:18143 advisory.

    The p11-kit packages provide a mechanism to manage PKCS#11 modules. The p11-kit-trust subpackage includes     a PKCS#11 trust module that provides certificate anchors and black lists based on configuration files.

    Security Fix(es):

    * p11-kit: p11-kit: NULL dereference via C_DeriveKey with specific NULL parameters (CVE-2026-2100)

    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.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 10 Release Notes     linked from 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 remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-7982f70f74 advisory.

    Notable changes from the rebase:
    * pkcs11: Update PKCS11 headers to version 3.2
    * rpc: fix NULL dereference via C_DeriveKey with specific NULL parameters (CVE-2026-2100)
    * trust: Lookup DNs in reverse order (RFC4514 section 2.1)

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 Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-f1fabb2a49 advisory.

    Notable changes from the rebase:
    * pkcs11: Update PKCS11 headers to version 3.2
    * rpc: fix NULL dereference via C_DeriveKey with specific NULL parameters (CVE-2026-2100)
    * trust: Lookup DNs in reverse order (RFC4514 section 2.1)

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 version of p11-kit installed on the remote host is prior to 0.26.2. It is, therefore, affected by a vulnerability as referenced in the SSA:2026-037-01 advisory.

    New p11-kit packages are available for Slackware 15.0 and -current to fix security issues.

Tenable has extracted the preceding description block directly from the p11-kit 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A flaw was found in p11-kit. A remote attacker could exploit this vulnerability by calling the C_DeriveKey     function on a remote token with specific IBM kyber or IBM btc derive mechanism parameters set to NULL.
    This could lead to the RPC-client attempting to return an uninitialized value, potentially resulting in a     NULL dereference or undefined behavior. This issue may cause an application level denial of service or     other unpredictable system states. (CVE-2026-2100)

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

ID	Name	Product	Family	Type	Severity
457350	Echo: p11-kit: security update to 0.25.5-3	Tenable Cloud Security	Echo Local Security Checks	Local	high
457350	Echo: p11-kit: security update to 0.25.5-3	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
356194	Rocky Linux 9 [CIQ] Security Update: p11-kit / p11-kit-client / p11-kit-client-debuginfo / etc (crlsa-2026_18599)	Nessus	Rocky Linux Local Security Checks	Local	high
355590	Rocky Linux 10.2 [CIQ] Security Update: p11-kit / p11-kit-client / p11-kit-client-debuginfo / etc (crlsa-2026_18143)	Nessus	Rocky Linux Local Security Checks	Local	high
328839	Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-7.6)	Nessus	Misc.	Local	critical
327038	Oracle Linux 10 : p11-kit (ELSA-2026-18143)	Nessus	Oracle Linux Local Security Checks	Local	high
443924	Alpine: multiple p11-kit packages: security update to 0.26.2-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	high
443924	Alpine: multiple p11-kit packages: security update to 0.26.2-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	high
322175	Oracle Linux 9 : p11-kit (ELSA-2026-18599)	Nessus	Oracle Linux Local Security Checks	Local	high
317962	RockyLinux 10 : p11-kit (RLSA-2026:18143)	Nessus	Rocky Linux Local Security Checks	Local	high
317422	RockyLinux 9 : p11-kit (RLSA-2026:18599)	Nessus	Rocky Linux Local Security Checks	Local	high
315437	RHEL 9 : p11-kit (RHSA-2026:18599)	Nessus	Red Hat Local Security Checks	Local	high
315308	RHEL 10 : p11-kit (RHSA-2026:18143)	Nessus	Red Hat Local Security Checks	Local	high
299148	Fedora 42 : p11-kit (2026-7982f70f74)	Nessus	Fedora Local Security Checks	Local	high
298696	Fedora 43 : p11-kit (2026-f1fabb2a49)	Nessus	Fedora Local Security Checks	Local	medium
298283	Slackware Linux 15.0 / current p11-kit Vulnerability (SSA:2026-037-01)	Nessus	Slackware Local Security Checks	Local	medium
298199	Linux Distros Unpatched Vulnerability : CVE-2026-2100	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-2100

high

Tenable Plugins

high

high

high

high

critical

high

high

high

high

high

high

high

high

high

medium

medium

high