CVE-2026-109970

Clevis: clevis: pkcs#11 token pin written to world-readable file

A flaw was found in the clevis PKCS#11 pin. The clevis-luks-pkcs11-askpin script writes the PKCS#11 token PIN in plaintext to a file without setting restrictive permissions. Under the default process umask, the file is world-readable. Additionally, the PIN file is not reliably cleaned up if the decryption script exits early, leaving the PIN accessible indefinitely.

CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed

Vendors

Red Hat Redhat

Products

Enterprise Linux Enterprise Linux Openshift and 2 more

CVE-2026-109969

Clevis: clevis: no authentication on pkcs#11 af_unix sockets allows key injection under permissive umask

A flaw was found in the clevis PKCS#11 pin. The clevis-pkcs11-afunix-socket-unlock daemon creates AF_UNIX sockets without explicit permission restrictions or peer credential verification. Under a permissive process umask, any local user can connect to the control socket and inject arbitrary device/key pairs, or connect to the data socket to receive LUKS passphrases.

CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed

Vendors

Red Hat Redhat

Products

Enterprise Linux Enterprise Linux Openshift and 2 more

CVE-2026-109968

Clevis: clevis: pkcs#11 luks passphrase logged in plaintext to world-readable file

A flaw was found in the clevis PKCS#11 pin. The clevis-pkcs11-afunix-socket-unlock daemon logs LUKS disk encryption passphrases in plaintext to a log file. The log file is created without restrictive permissions, making it world-readable under the default process umask. A local attacker can read the log file to obtain the LUKS passphrase.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Vendors

Red Hat Redhat

Products

Enterprise Linux Enterprise Linux Openshift and 2 more

CVE-2025-5318

Libssh: out-of-bounds read in sftp_handle()

A flaw was found in the libssh library in versions less than 0.11.2. An out-of-bounds read can be triggered in the sftp_handle function due to an incorrect comparison check that permits the function to access memory beyond the valid handle list and to return an invalid pointer, which is used in further processing. This vulnerability allows an authenticated remote attacker to potentially read unintended memory regions, exposing sensitive information or affect service behavior.

CVSS 3.1 · 5.4 Medium EPSS 1.9% KEV · Not listed

Vendors

Libssh Redhat

Products

Libssh Ai Inference Server Enterprise Linux and 8 more

CVE-2026-0966

Libssh: libssh: denial of service via zero-length input in ssh_get_hexa()

A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server's logging verbosity is set to `SSH_LOG_PACKET (3)` or higher. Successful exploitation could lead to a self-Denial of Service of the per-connection daemon process.

CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed

Vendors

Libssh Redhat

Products

Libssh Enterprise Linux Hardened Images and 4 more

CVE-2026-0964

Libssh: improper sanitation of paths received from scp servers

A malicious SCP server can send unexpected paths that could make the client application override local files outside of working directory. This could be misused to create malicious executable or configuration files and make the user execute them under specific consequences. This is the same issue as in OpenSSH, tracked as CVE-2019-6111.

CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed

Vendors

Libssh Redhat

Products

Libssh Enterprise Linux Hardened Images and 4 more

CVE-2025-7519

Polkit: xml policy file with a large number of nested elements may lead to out-of-bounds write

A flaw was found in polkit. When processing an XML policy with 32 or more nested elements in depth, an out-of-bounds write can be triggered. This issue can lead to a crash or other unexpected behavior, and arbitrary code execution is not discarded. To exploit this flaw, a high-privilege account is needed as it's required to place the malicious policy file properly.

CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Openshift Openshift Container Platform and 1 more

CVE-2026-107565

Luksmeta: incomplete gap-boundary and overlap checks in luks1 metadata allocator allow data corruption

A flaw was found in luksmeta. A local attacker with administrative privileges can cause data corruption when saving metadata to a Linux Unified Key Setup (LUKS) device. Due to incorrect boundary calculations and flawed overlap detection, new metadata entries can be written beyond available free space or over existing records. This issue can corrupt stored encrypted payload data or existing metadata, potentially rendering the affected data inaccessible.

CVSS 3.1 · 5.1 Medium EPSS < 1% KEV · Not listed

Vendors

Luksmeta Redhat

Products

Luksmeta Enterprise Linux Openshift and 2 more

CVE-2026-104048

Sssd: sssd: authorization bypass via cross-domain username collision in hbac evaluation

A flaw was found in SSSD. In trust-enabled identity management environments, SSSD evaluates Host-Based Access Control (HBAC) rules by stripping domain qualifiers and comparing only short usernames. An authenticated user in a trusted domain who shares the same username as an authorized local account can bypass access policies and gain unauthorized access to protected services or hosts.

CVSS 3.1 · 6.8 Medium EPSS < 1% KEV · Not listed

Vendors

Fedoraproject Redhat Sssd

Products

Sssd Enterprise Linux Openshift and 3 more

CVE-2026-104047

Sssd: sssd: information disclosure via query injection in entra id lookups

A flaw was found in SSSD. When configured to use Microsoft Entra ID, search inputs are not properly sanitized before being incorporated into directory query filters. A local user can exploit this vulnerability by submitting a crafted lookup request, manipulating the query logic to cause unauthorized information disclosure from the directory.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Fedoraproject Redhat Sssd

Products

Sssd Enterprise Linux Openshift and 3 more

CVE-2026-104046

Sssd: sssd: denial of service via incomplete identity provider authentication requests

A flaw was found in SSSD (System Security Services Daemon). When Identity Provider (IdP) authentication is enabled, pre-authentication requests retain state in memory without being cleared or timed out. A local attacker can repeatedly initiate authentication flows without completing them, causing unbounded memory consumption. This memory exhaustion can lead to a Denial of Service (DoS) by degrading or terminating SSSD authentication services.

CVSS 3.1 · 6.2 Medium EPSS < 1% KEV · Not listed

Vendors

Fedoraproject Redhat Sssd

Products

Sssd Enterprise Linux Openshift and 3 more

CVE-2026-104045

Sssd: sssd: denial of service via race condition in autofs responder

A flaw was found in SSSD. A local user can trigger a Denial of Service (DoS) by exploiting a race condition in the autofs responder between asynchronous enumeration completion and map invalidation. By repeatedly sending concurrent map enumeration and invalidation requests, an attacker can cause memory to leak, leading to excessive memory consumption that can disrupt or crash the autofs service.

CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed

Vendors

Fedoraproject Redhat Sssd

Products

Sssd Enterprise Linux Openshift and 3 more

CVE-2026-104044

Sssd: sssd: denial of service via crafted passkey kerberos authentication request

A flaw was found in sssd. A local attacker can trigger a Denial of Service (DoS) by sending a specially crafted Pluggable Authentication Module (PAM) request when passkey authentication is enabled. Due to a missing state validation check in passkey Kerberos handling, the PAM responder dereferences an uninitialized pointer and crashes. This failure disrupts authentication services on the host.

CVSS 3.1 · 6.2 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat Sssd

Products

Enterprise Linux Openshift Openshift Container Platform and 2 more

CVE-2026-104043

Sssd: sssd: denial of service via undersized packet parsing in nss responder

A flaw was found in SSSD. A local attacker with access to the Name Service Switch (NSS) responder UNIX socket can trigger an integer underflow by sending a specially crafted request with an undersized packet header. This issue causes an out-of-bounds memory read during packet parsing, crashing the responder process and resulting in a Denial of Service (DoS).

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat Sssd

Products

Enterprise Linux Openshift Openshift Container Platform and 2 more

CVE-2026-104042

Sssd: sssd: denial of service via out-of-bounds read in pam responder

A flaw was found in sssd. A local attacker can cause a Denial of Service (DoS) by sending a crafted Pluggable Authentication Module (PAM) request containing a zero-length authentication token to the responder socket. Due to missing input validation, the service attempts to read beyond buffer boundaries when processing the token, causing the PAM responder to crash.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat Sssd

Products

Enterprise Linux Openshift Openshift Container Platform and 2 more

CVE-2026-104039

Sssd: sssd: denial of service via stale connection state reuse in pam gssapi responder

A flaw was found in SSSD. A local user can cause a denial of service (DoS) by disrupting system authentication services. When handling Generic Security Services Application Programming Interface (GSSAPI) authentication in the Pluggable Authentication Module (PAM) responder, cached connection state is freed upon completion without clearing the reference pointer. An attacker can exploit this by sending an additional request over the same connection, causing the service to access invalid memory and unexpectedly terminate.

CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed

Vendors

Fedoraproject Redhat Sssd

Products

Sssd Enterprise Linux Openshift and 3 more

CVE-2026-104038

Sssd: sssd: denial of service via missing sid extension in certificate mapping

A flaw was found in sssd. A remote attacker can cause a denial of service (DoS) by submitting a certificate that lacks an expected Security Identifier (SID) extension. In deployments configured with SID-based certificate mapping rules, the service fails to verify the presence of the extension before processing it, causing the process to crash during authentication or lookup operations.

CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat Sssd

Products

Enterprise Linux Openshift Openshift Container Platform and 2 more

CVE-2026-104037

Sssd: sssd: denial of service via packet length underflow in autofs responder

A flaw was found in SSSD. A local attacker can exploit this issue by sending a specially crafted request with an invalid packet length to the autofs responder UNIX socket. This causes an integer underflow and an out-of-bounds memory read, which can crash the responder process and result in a denial of service (DoS).

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat Sssd

Products

Enterprise Linux Openshift Openshift Container Platform and 2 more

CVE-2026-104036

Sssd: sssd: denial of service via out-of-bounds write in nfs idmap plugin

A flaw was found in SSSD's NFS idmap plugin. When retrieving cached user or group names, the plugin detects if an entry exceeds the destination buffer size but fails to abort before copying data. A local attacker can trigger this vulnerability by requesting identity lookups that resolve to oversized cached entries, resulting in an out-of-bounds write. This flaw primarily leads to a Denial of Service (DoS) by crashing the identity mapping service, and may also corrupt adjacent process memory.

CVSS 3.1 · 5.8 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat Sssd

Products

Enterprise Linux Openshift Openshift Container Platform and 2 more

CVE-2026-104035

Sssd: sssd: denial of service via memory exhaustion in kcm responder

A flaw was found in SSSD. An issue in the Kerberos Credential Manager (KCM) responder allows a local user to cause a Denial of Service (DoS) by maintaining a persistent connection and repeatedly storing and destroying credentials. Because the service fails to release cached objects from memory when credentials are removed, memory consumption grows continuously, ultimately exhausting available memory and rendering the service unresponsive.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat Sssd

Products

Enterprise Linux Openshift Openshift Container Platform and 2 more