Debian Linux - samba - None

Ubuntu Linux - Samba AD LDAP Compare filter injection and trusted-request confusion disclose protected attributes. An ordinary authenticated domain user can bypass access checks and query confidential Active Directory attributes (such as KDS root keys) via LDAP Compare requests. Due to a filter injection flaw and trusted execution context, the LDAP Compare operation can be turned into a protected-attribute disclosure oracle.

The version of samba installed on the remote host is prior to 4.22.11 / 4.24.5. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2026-209-03 advisory.

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

Tenable has extracted the preceding description block directly from the samba 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 SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3367-1 advisory.

    This update for samba fixes the following issues

    - CVE-2026-6949: TSIG packet with crafted name compression can crash internal DNS server (bsc#1271672).
    - CVE-2026-15779: `pam_winbind` module with `mkhomedir` set allows `chown` of critical system paths     without validation       (bsc#1271469).
    - CVE-2026-58216: 6-byte heap OOB read in packet parser of the `kpasswd` service (bsc#1271674).
    - CVE-2026-58218: DNS TKEY negotiation stores unauthenticated GSS contexts in a fixed FIFO before     authentication       completes (bsc#1271675).
    - CVE-2026-58221: authenticated LDAP access to internal LDB special DNs permits domain takeover     (bsc#1271676).
    - CVE-2026-58222: LDAP Compare filter injection and trusted-request confusion disclose protected     attributes       (bsc#1271677).
    - CVE-2026-58224: heap OOB read due to unchecked packet length fields in CTDB (bsc#1271673).

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 SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3362-1 advisory.

    This update for samba fixes the following issues

    - CVE-2026-6949: TSIG packet with crafted name compression can crash internal DNS server (bsc#1271672).
    - CVE-2026-15779: `pam_winbind` module with `mkhomedir` set allows `chown` of critical system paths     without validation       (bsc#1271469).
    - CVE-2026-58216: 6-byte heap OOB read in packet parser of the `kpasswd` service (bsc#1271674).
    - CVE-2026-58218: DNS TKEY negotiation stores unauthenticated GSS contexts in a fixed FIFO before     authentication       completes (bsc#1271675).
    - CVE-2026-58221: authenticated LDAP access to internal LDB special DNs permits domain takeover     (bsc#1271676).
    - CVE-2026-58222: LDAP Compare filter injection and trusted-request confusion disclose protected     attributes       (bsc#1271677).
    - CVE-2026-58224: heap OOB read due to unchecked packet length fields in CTDB (bsc#1271673).

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 SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3364-1 advisory.

    This update for samba fixes the following issues

    - CVE-2026-6949: TSIG packet with crafted name compression can crash internal DNS server (bsc#1271672).
    - CVE-2026-15779: `pam_winbind` module with `mkhomedir` set allows `chown` of critical system paths     without validation       (bsc#1271469).
    - CVE-2026-58216: 6-byte heap OOB read in packet parser of the `kpasswd` service (bsc#1271674).
    - CVE-2026-58218: DNS TKEY negotiation stores unauthenticated GSS contexts in a fixed FIFO before     authentication       completes (bsc#1271675).
    - CVE-2026-58221: authenticated LDAP access to internal LDB special DNs permits domain takeover     (bsc#1271676).
    - CVE-2026-58222: LDAP Compare filter injection and trusted-request confusion disclose protected     attributes       (bsc#1271677).
    - CVE-2026-58224: heap OOB read due to unchecked packet length fields in CTDB (bsc#1271673).

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 SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3363-1 advisory.

    This update for samba fixes the following issues

    - CVE-2026-6949: TSIG packet with crafted name compression can crash internal DNS server (bsc#1271672).
    - CVE-2026-15779: `pam_winbind` module with `mkhomedir` set allows `chown` of critical system paths     without validation       (bsc#1271469).
    - CVE-2026-58216: 6-byte heap OOB read in packet parser of the `kpasswd` service (bsc#1271674).
    - CVE-2026-58218: DNS TKEY negotiation stores unauthenticated GSS contexts in a fixed FIFO before     authentication       completes (bsc#1271675).
    - CVE-2026-58221: authenticated LDAP access to internal LDB special DNs permits domain takeover     (bsc#1271676).
    - CVE-2026-58222: LDAP Compare filter injection and trusted-request confusion disclose protected     attributes       (bsc#1271677).
    - CVE-2026-58224: heap OOB read due to unchecked packet length fields in CTDB (bsc#1271673).

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 SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3365-1 advisory.

    This update for samba fixes the following issues

    - CVE-2026-6949: TSIG packet with crafted name compression can crash internal DNS server (bsc#1271672).
    - CVE-2026-15779: `pam_winbind` module with `mkhomedir` set allows `chown` of critical system paths     without validation       (bsc#1271469).
    - CVE-2026-58216: 6-byte heap OOB read in packet parser of the `kpasswd` service (bsc#1271674).
    - CVE-2026-58218: DNS TKEY negotiation stores unauthenticated GSS contexts in a fixed FIFO before     authentication       completes (bsc#1271675).
    - CVE-2026-58221: authenticated LDAP access to internal LDB special DNs permits domain takeover     (bsc#1271676).
    - CVE-2026-58222: LDAP Compare filter injection and trusted-request confusion disclose protected     attributes       (bsc#1271677).
    - CVE-2026-58224: heap OOB read due to unchecked packet length fields in CTDB (bsc#1271673).

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.

  - Samba's LDAP CompareRequest path contains two independent security flaws that can be combined by an     authenticated attacker to construct a reliable oracle for protected (confidential) Active Directory     attributes. 1. Filter Injection Flaw When processing an LDAP Compare request, Samba constructs a textual     LDB filter by directly formatting the user-provided attribute name and assertion value into a search     filter string using talloc_asprintf(): filter = talloc_asprintf(local_ctx, (%s=%*s), req->attribute,     (int)req->value.length, req->value.data); This formulation is unsafe because: - The attribute name is not     validated as a valid LDAP AttributeDescription. - The assertion value is not escaped. - The field format     (%*s) does not properly handle binary or BER-encoded bytes. By providing an attribute name containing     filter operators (for example, appending >= to the attribute name), an attacker can coerce Samba into     evaluating a comparison operator other than equality. 2. Trusted Search Context Flaw Samba evaluates the     generated filter using an internal local LDB search request without marking it as untrusted. Normal LDAP     search requests enforce access controls by marking requests from unprivileged connections as untrusted.
    The ACL read module uses this marker to determine whether it must enforce visibility checks. Because     Compare requests do not mark the database search as untrusted, they are evaluated with trusted system-     level visibility, bypassing standard ACL checks for confidential attributes. Combining these two flaws, an     ordinary authenticated domain user can issue ordered true/false Compare queries (e.g. using inequality     operators like >=) to binary-search and reconstruct binary values of confidential attributes that are     normally redacted from LDAP Search results. A key target for this attack is the msKds-RootKeyData     attribute, which contains the root secret for the Group Key Distribution Service (GKDI). On Samba AD DC     installations supporting Group Managed Service Accounts (gMSAs) (Samba 4.21.0 and later), an attacker can     extract this key and derive the passwords of gMSAs offline. If a privileged gMSA exists, this allows full     domain compromise. (CVE-2026-58222)

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

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6401 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6401-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     July 28, 2026                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : samba     CVE ID         : CVE-2026-6949 CVE-2026-58216 CVE-2026-58218 CVE-2026-58221                      CVE-2026-58222 CVE-2026-58224

    Several vulnerabilities have been discovered in Samba, a SMB/CIFS file,     print, and login server for Unix, which might result in denial of     service, domain takeover, information disclosure or privilege     escalation.

    For the stable distribution (trixie), these problems have been fixed in     version 2:4.22.10+dfsg-0+deb13u2.

    We recommend that you upgrade your samba packages.

    For the detailed security status of samba please refer to its security     tracker page at:
    https://security-tracker.debian.org/tracker/samba

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian 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	Severity
330587	Slackware Linux 15.0 / current samba Multiple Vulnerabilities (SSA:2026-209-03)	Nessus	Slackware Local Security Checks	high
330563	SUSE SLES12: ctdb / libsamba-policy-devel / libsamba-policy-python3-devel / etc (SUSE-SU-2026:3367-1)	Nessus	SuSE Local Security Checks	medium
330560	SUSE SLES15: ctdb / libsamba-policy-devel / libsamba-policy-python3-devel / etc (SUSE-SU-2026:3362-1)	Nessus	SuSE Local Security Checks	medium
330553	SUSE SLES15: ctdb / libsamba-policy-devel / libsamba-policy-python3-devel / etc (SUSE-SU-2026:3364-1)	Nessus	SuSE Local Security Checks	medium
330549	SUSE SLED15: ctdb / ldb-tools / libldb-devel / libldb2 / libldb2-32bit / etc (SUSE-SU-2026:3363-1)	Nessus	SuSE Local Security Checks	medium
330538	SUSE SLES15: ctdb / libsamba-policy-devel / libsamba-policy-python3-devel / etc (SUSE-SU-2026:3365-1)	Nessus	SuSE Local Security Checks	medium
330477	Linux Distros Unpatched Vulnerability : CVE-2026-58222	Nessus	Misc.	high
330422	Debian dsa-6401 : ctdb - security update	Nessus	Debian Local Security Checks	medium

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CVE-2026-58222

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