CVE-2026-4775

Libtiff: libtiff: arbitrary code execution or denial of service via signed integer overflow in tiff file processing

A flaw was found in the libtiff library. A remote attacker could exploit a signed integer overflow vulnerability in the putcontig8bitYCbCr44tile function by providing a specially crafted TIFF file. This flaw can lead to an out-of-bounds heap write due to incorrect memory pointer calculations, potentially causing a denial of service (application crash) or arbitrary code execution.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Debian Libtiff Redhat

Products

Debian Linux Libtiff Ai Inference Server and 17 more

CVE-2026-4480

Samba: samba: remote code execution in printing subsystem via unescaped job description

A flaw was found in the Samba printing subsystem. Samba passes the client-controlled job description string to the command configured with the "print command" setting via the "%J" substitution character without escaping shell meta characters. A remote attacker could exploit this vulnerability by sending a specially crafted print job description that contains unescaped shell characters. This could lead to remote code execution on the affected system.

CVSS 3.1 · 9 Critical EPSS 28.7% KEV · Not listed

Vendors

Redhat Samba

Products

Enterprise Linux Enterprise Linux Eus Openshift and 8 more

CVE-2026-4424

Libarchive: libarchive: information disclosure via heap out-of-bounds read in rar archive processing

A flaw was found in libarchive. This heap out-of-bounds read vulnerability exists in the RAR archive processing logic due to improper validation of the LZSS sliding window size after transitions between compression methods. A remote attacker can exploit this by providing a specially crafted RAR archive, leading to the disclosure of sensitive heap memory information without requiring authentication or user interaction.

CVSS 3.1 · 7.5 High EPSS 1.3% KEV · Not listed

Vendors

Libarchive Redhat

Products

Libarchive Ai Inference Server Cert Manager and 19 more

CVE-2026-4408

Samba: remote code execution in samr

A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers and classic domain controllers that use the "check password script" feature. If this script is configured with the %u substitution character, the client-controlled username is passed without proper escaping of shell meta-characters. This vulnerability allows an attacker to achieve remote command execution on the affected system. This issue primarily affects non-standard configurations where the "check password script" is used with %u and the samba-dcerpcd service is started as a system service.

CVSS 3.1 · 9 Critical EPSS 46.9% KEV · Not listed

Vendors

Redhat Samba

Products

Enterprise Linux Enterprise Linux Eus Openshift and 8 more

CVE-2026-42010

Gnutls: gnutls: authentication bypass via nul character in username

A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.

CVSS 3.1 · 7.1 High EPSS 1.1% KEV · Not listed

Vendors

Gnu Redhat

Products

Gnutls Ai Inference Server Cert Manager and 15 more

CVE-2026-42009

Gnutls: gnutls: denial of service via dtls packet reordering vulnerability

A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.

CVSS 3.1 · 7.5 High EPSS 1.3% KEV · Not listed

Vendors

Gnu Redhat

Products

Gnutls Ai Inference Server Cert Manager and 25 more

CVE-2026-33846

Gnutls: gnutls: denial of service via heap buffer overflow in dtls handshake fragment reassembly

A heap buffer overflow vulnerability exists in the DTLS handshake fragment reassembly logic of GnuTLS. The issue arises in merge_handshake_packet() where incoming handshake fragments are matched and merged based solely on handshake type, without validating that the message_length field remains consistent across all fragments of the same logical message. An attacker can exploit this by sending crafted DTLS fragments with conflicting message_length values, causing the implementation to allocate a buffer based on a smaller initial fragment and subsequently write beyond its bounds using larger, inconsistent fragments. Because the merge operation does not enforce proper bounds checking against the allocated buffer size, this results in an out-of-bounds write on the heap. The vulnerability is remotely exploitable without authentication via the DTLS handshake path and can lead to application crashes or potential memory corruption.

CVSS 3.1 · 7.5 High EPSS 1.3% KEV · Not listed

Vendors

Gnu Redhat

Products

Gnutls Ai Inference Server Cert Manager and 15 more

CVE-2026-33845

Gnutls: gnutls: denial of service via dtls zero-length fragment

A flaw in GnuTLS DTLS handshake parsing allows malformed fragments with zero length and non-zero offset, leading to an integer underflow during reassembly and resulting in an out-of-bounds read. This issue is remotely exploitable and may cause information disclosure or denial of service.

CVSS 3.1 · 7.5 High EPSS 2.1% KEV · Not listed

Vendors

Gnu Redhat

Products

Gnutls Ai Inference Server Cert Manager and 15 more

CVE-2026-3012

Samba: group policy certificate enrollment uses http:// without validation

A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.

CVSS 3.1 · 8 High EPSS < 1% KEV · Not listed

Vendors

Redhat Samba

Products

Enterprise Linux Enterprise Linux Eus Openshift and 8 more

CVE-2026-16529

Pcp: pcp: denial of service due to signed integer overflow

A signed integer overflow in the PCP __pmGetPDU() function can be exploited via crafted network packets during PDU processing or SASL negotiation. This permanently blinds the affected daemon, resulting in a total denial of service (DoS) for subsequent packet reads.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Enterprise Linux Eus Openshift and 7 more

CVE-2026-16527

Pcp: pcp pmproxy: unauthenticated access to /store endpoint allows bypassing pmcd access rules

An unauthenticated remote attacker can bypass access controls by sending crafted requests to the PCP pmproxy /store endpoint. This allows the attacker to overwrite any PMDA metric, leading to arbitrary code execution and system takeover.

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Enterprise Linux Eus Openshift and 7 more

CVE-2026-16526

Pcp: pcp: privilege escalation to root via linux_sockets pmda vulnerability

A flaw in the PCP linux_sockets module exposes an unsecured internal connection. An attacker with initial code execution can exploit this to escalate privileges and execute arbitrary commands as root.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Enterprise Linux Eus Openshift and 7 more

CVE-2026-16524

Pcp: pcp linux_sockets pmda: arbitrary command execution via command injection

A command injection flaw in PCP's linux_sockets PMDA allows malicious shell metacharacters via the network.persocket.filter metric. This failed validation lets attackers execute arbitrary commands as the PMDA user when metrics refresh.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Enterprise Linux Eus Openshift and 7 more

CVE-2026-1933

Samba: missing access check on reparse point operations

A flaw was found in Samba’s handling of NTFS-style reparse points on shares configured with read only = yes. Due to missing SMB-layer access checks, authenticated users with underlying filesystem write permissions may create or delete reparse point metadata through SMB operations even on read-only exports. This could allow modification of SMB-visible file behavior, including converting files into symbolic links or other reparse point types.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Redhat Samba

Products

Enterprise Linux Enterprise Linux Eus Openshift and 8 more

CVE-2026-1761

Libsoup: stack-based buffer overflow in libsoup multipart response parsingmultipart http response

A flaw was found in libsoup. This stack-based buffer overflow vulnerability occurs during the parsing of multipart HTTP responses due to an incorrect length calculation. A remote attacker can exploit this by sending a specially crafted multipart HTTP response, which can lead to memory corruption. This issue may result in application crashes or arbitrary code execution in applications that process untrusted server responses, and it does not require authentication or user interaction.

CVSS 3.1 · 8.6 High EPSS 1.1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Enterprise Linux Eus Openshift Devspaces and 6 more

CVE-2026-12912

Libtiff: libtiff: heap-based buffer overflow via crafted pixarlog-compressed tiff image

A flaw was found in libtiff. A remote attacker could exploit this vulnerability by providing a specially crafted PixarLog-compressed TIFF image. This issue occurs when decoding Pixarlog codec images with the PIXARLOGDATAFMT_8BITABGR output format and a specific stride value, leading to a heap-based buffer overflow. This could potentially result in arbitrary code execution or a denial of service (DoS).

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed

Vendors

Libtiff Redhat

Products

Libtiff Enterprise Linux Enterprise Linux Eus and 9 more

CVE-2026-12505

Cifs-utils: local privilege escalation via forged cifs.spnego key description in cifs.upcall

A flaw was found in the cifs-utils package where the cifs.upcall helper fails to securely drop its root privileges before looking up user information inside a user-controlled environment. A local, low privileged attacker can exploit this by using a crafted request_key payload to trick the root-owned helper into entering a custom environment (namespace) containing a malicious NSS module. This forces the system to load the attacker's controlled NSS Module and configuration, allowing them to execute arbitrary commands as the root user, elevating their privileges and fully compromising the system.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Cifs-utils Enterprise Linux Openshift and 2 more

CVE-2026-16460

Bootc: ostree: bootc/ostree: staged deployments not revalidated against container signature policy before finalization

A flaw was found in bootc and ostree. Already-staged deployments are finalized without revalidating the deployment's container image against the current containers signature policy. Unsigned OS content staged under a prior permissive policy can remain bootable after policy is hardened to reject unsigned images, leading to full host compromise on reboot.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed

Vendors

Bootc Redhat

Products

Bootc Enterprise Linux Hardened Images and 3 more

CVE-2026-16445

Dracut: dracut: root code execution via dhcp options command injection in networkmanager initrd module

A flaw was found in dracut. A remote attacker on the adjacent network can exploit this vulnerability by providing specially crafted DHCP options, such as a malicious root-path, next-server, or bootfile name, to a system using dracut's NetworkManager-based initrd network module. These options are improperly handled and written into a temporary shell script without proper escaping, leading to command injection. This allows the attacker to achieve root code execution within the initramfs during system boot.

CVSS 3.1 · 7.5 High EPSS 3.2% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Hummingbird Openshift and 5 more

CVE-2026-14474

Sssd: sssd: sudo ldap provider searches entire directory tree for sudorole objects by default, enabling privilege escalation

A flaw was found in SSSD's LDAP sudo provider. When the ldap_sudo_search_base option is not explicitly configured, SSSD searches the entire LDAP directory tree for sudoRole objects. An authenticated attacker with write access to any subtree can inject a sudoRole object granting root-level sudo privileges on all SSSD-enrolled hosts.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Enterprise Linux Eus Openshift and 6 more