CVE-2026-90462

Sssd: sssd: fail-open in ldap ppolicy access check allows continued authorization

A flaw was found in SSSD. When configured with the LDAP access provider and `ldap_access_order` including `ppolicy` or `lockout`, a fail-open condition in the LDAP ppolicy access check can occur if a user lookup returns zero results. This can incorrectly return success and cache an allow decision, permitting continued authorization for a deleted or deprovisioned user. A remote attacker with prior valid account context could exploit this to maintain access to information and potentially make limited modifications to resources that should no longer be available.

CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed

Vendors

Fedoraproject Redhat Sssd

Products

Sssd Enterprise Linux Openshift and 3 more

CVE-2026-89329

Device-mapper-multipath: local denial of service via blocking ipc send operations

A flaw was found in `multipathd`. A local attacker with access to the `multipathd` UNIX control socket can exploit this vulnerability by sending valid commands and then ceasing to read replies. This action can cause the `multipathd` listener thread to block, leading to a Denial of Service (DoS) where legitimate Inter-Process Communication (IPC) operations may hang or time out. This issue does not result in privilege escalation, arbitrary code execution, or impact data confidentiality or integrity.

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

Vendors

Redhat

Products

Enterprise Linux Openshift Openshift Container Platform and 1 more

CVE-2026-89098

Nfs-utils: nfs-utils: denial of service via assertion failure in fsidd

A flaw was found in nfs-utils. The fsidd daemon improperly handles input received over its local domain socket by relying on program assertions to verify command arguments. A local user can exploit this vulnerability by sending a malformed request lacking the required arguments to trigger an assertion failure. This causes the daemon to crash, resulting in a Denial of Service (DoS) for filesystem identifier lookup services until restarted.

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

Vendors

Nfs Redhat

Products

Nfs-utils Enterprise Linux Openshift and 2 more

CVE-2026-89096

Nfs-utils: nfs-utils: denial of service via memory leak in rpc.statd

A flaw was found in nfs-utils. An unauthenticated remote attacker can trigger a Denial of Service (DoS) by sending repeated state notification requests to an exposed rpc.statd service. The service fails to properly release memory allocated during callback processing, leading to continuous memory growth. Sustained requests can exhaust system resources, eventually causing the service to degrade or crash.

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

Vendors

Nfs Redhat

Products

Nfs-utils Enterprise Linux Openshift and 2 more

CVE-2026-88265

Crun: crun: /dev/null symlink follow during stdio reopen allows host bind-mount write and chown

A flaw was found in crun. After pivot_root, reopening /dev/null for stdio can follow a symlink and attach a host file to container stdio, then change that file's ownership. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.

CVSS 3.1 · 5.6 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Hardened Images Hummingbird and 1 more

CVE-2026-88264

Crun: crun: /dev/console symlink follow allows root-owned file creation outside the rootfs

A flaw was found in crun. When the container configuration does not give /dev a dedicated mount, terminal setup can redirect /dev/console onto an attacker-controlled path, including via the read-only-rootfs bind-mount fallback. Affected versions are crun 1.29.1 and earlier. Default configurations that mount a fresh /dev are not exposed. No fixed release is available yet.

CVSS 3.1 · 5.6 Medium EPSS < 1% KEV · Not listed

Vendors

Containers Redhat

Products

Crun Enterprise Linux Hardened Images and 2 more

CVE-2026-88252

Sssd: sssd: denial of service via responder connection retry loop during file descriptor exhaustion

A flaw was found in sssd. A local user can cause a Denial of Service (DoS) by exhausting the responder service's available file descriptors (system handles used for open connections). By opening and maintaining many concurrent connections to a responder socket while continuing to queue new connection attempts, an attacker can trigger an unthrottled retry loop. This condition leads to high CPU utilization and stalls the service, preventing legitimate identity and authentication requests from being processed.

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

Vendors

Fedoraproject Redhat Sssd

Products

Sssd Enterprise Linux Openshift and 3 more

CVE-2026-87875

Cups: openprinting cups: heap out-of-bounds read in cupsutf32toutf8() via missing source-length bound

The cupsUTF32ToUTF8() function in CUPS's cups/transcode.c lacks a source-length bound and can read past the end of the source buffer, resulting in a heap out-of-bounds read. This is reachable via SNMP supply-description parsing in backend/snmp-supplies.c with attacker-controlled content.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Vendors

Openprinting Redhat

Products

Cups Enterprise Linux Hardened Images and 4 more

CVE-2026-84828

Pcs: pcs: non-root haclient users can read arbitrary files via pcs host auth --token

A flaw was found in PCS (Pacemaker Configuration System). A local attacker with membership in the 'haclient' group can exploit the 'pcs host auth --token' command to read the contents of arbitrary files on the filesystem, provided the files are shorter than 256 bytes. The file contents are read with root privileges by the pcsd daemon and can be exfiltrated by the attacker through subsequent cluster node communication. This allows disclosure of sensitive data such as API keys, tokens, or configuration secrets that would otherwise be inaccessible to the attacker.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Openshift Openshift Container Platform and 2 more

CVE-2026-84185

Jwcrypto: jwcrypto: general json jws kid binding bypass during jwkset verification

A flaw was found in the jwcrypto library, which is used for implementing Javascript Object Signing and Encryption (JOSE) standards. The issue occurs when the library verifies a General JSON Serialization JWS using a set of keys. Due to a coding error, the library fails to correctly identify the specific key ID (kid) and may instead accept a signature made by any valid key in the set. This can allow an attacker with a valid key to bypass authorization checks in applications that rely on the key ID to identify specific tenants or users.

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

Vendors

Red Hat Redhat

Products

Red Hat Openshift Ai (rhoai) Ansible Automation Platform Enterprise Linux and 4 more

CVE-2026-81666

Corosync: corosync: integer overflow in check_memb_commit_token_sanity may bypass message length validation on 32-bit systems

An integer overflow was found in Corosync's handling of membership commit token messages. The length-validation check for these messages can be bypassed on 32-bit systems due to an integer overflow in the calculation of the expected message length, allowing a crafted network packet to trigger an out-of-bounds memory access that crashes the Corosync daemon. This results in a denial of service for the affected cluster node. The overflow does not occur on 64-bit systems, where the length calculation is correctly performed in 64-bit arithmetic.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Corosync Redhat

Products

Corosync Enterprise Linux Openshift and 2 more

CVE-2026-80048

Sssd: sssd-kcm: local denial of service via excessive memory preallocation

A flaw was found in `sssd-kcm`. A local user or process able to connect to the `sssd-kcm` UNIX socket can exploit this vulnerability. By sending a large request length header and then stalling the connection, an attacker can cause the system to preallocate significant memory. This leads to memory exhaustion within the `sssd-kcm` responder, resulting in a Denial of Service (DoS) for affected deployments.

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-2026-77014

Libsoup: libsoup: integer truncation in sort_ranges() comparator causes silent omission of http range responses

A flaw was found in libsoup's SoupServer HTTP Range header processing. The sort_ranges() comparator in soup-message-headers.c truncates a 64-bit subtraction result to 32-bit int, flipping the sign for range offsets differing by more than INT_MAX. This causes silent omission of requested byte ranges from HTTP 206 Partial Content responses on resources larger than approximately 2 GB.

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

Vendors

Redhat

Products

Enterprise Linux Openshift Openshift Container Platform and 1 more

CVE-2026-76781

Libxml2: libxml2: null pointer dereference parsing nextcatalog without catalog attribute

A flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a `nextCatalog` element lacks its mandatory `catalog` attribute, leading to the application crashing and causing a Denial of Service (DoS).

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

Vendors

Redhat

Products

Enterprise Linux Hardened Images Hummingbird and 4 more

CVE-2026-68742

Sssd: sssd: nss responder out-of-bounds read via unchecked addrlen in gethostbyaddr

A flaw was found in SSSD. The sss_nss_protocol_parse_addr() function in the NSS responder does not validate the addrlen field against the remaining packet body size. A local attacker can exploit this via a crafted GETHOSTBYADDR request to the NSS responder socket, causing an out-of-bounds read and process crash, resulting in a denial of service.

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

Vendors

Fedoraproject Redhat Sssd

Products

Sssd Enterprise Linux Openshift and 3 more

CVE-2026-68743

Sssd: sssd: pam responder out-of-bounds read via unchecked auth_token_length in protocol v1

A flaw was found in SSSD. The extract_authtok_v1() function in the PAM responder does not validate the auth_token_length field against the remaining buffer size before processing. A local attacker can exploit this via a crafted protocol v1 request to the PAM responder socket, causing an out-of-bounds read and process crash, resulting in a denial of service.

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

Vendors

Fedoraproject Redhat Sssd

Products

Sssd Enterprise Linux Openshift and 3 more

CVE-2026-6862

Efivar: efivar: denial of service due to stack overflow in device path node parsing

A flaw was found in libefiboot, a component of efivar. The device path node parser in libefiboot fails to validate that each node's Length field is at least 4 bytes, which is the minimum size for an EFI (Extensible Firmware Interface) device path node header. A local user could exploit this vulnerability by providing a specially crafted device path node. This can lead to infinite recursion, causing stack exhaustion and a process crash, resulting in a denial of service (DoS).

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

Vendors

Redhat Ubuntu

Products

Enterprise Linux Hummingbird Openshift and 3 more

CVE-2026-6843

Nano: nano: format string vulnerability leads to denial of service

A flaw was found in nano. A local user could exploit a format string vulnerability in the `statusline()` function. By creating a directory with a name containing `printf` specifiers, the application attempts to display this name, leading to a segmentation fault (SEGV). This results in a Denial of Service (DoS) for the `nano` application.

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

Vendors

Gnu Redhat

Products

Nano Enterprise Linux Nano and 3 more

CVE-2026-72693

Kbd: local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login

`openvt -u` is intended to identify the owner of the current VT and then execute `login` as that user from a privileged context. In the documented `kbrequest`/init usage, the ownership test in `authenticate_user()` relies on `stat("/proc/<pid>/fd/0")`. `stat()` on `/proc/<pid>/fd/0` follows the symlink to the underlying TTY device node. As a result, `buf.st_uid` reflects the owner of the TTY node rather than the owner of the process holding the file descriptor. If the TTY owner returns to `root` or the getty owner after logout while an unprivileged process still has `fd 0` attached to that TTY, the check can incorrectly treat that process as belonging to the privileged console owner. Once that check succeeds, the `-u` path executes a passwordless login as the selected user. In the documented `kbrequest`/init deployment using `openvt -us`, this can result in passwordless `login -f root` on the spawned VT. This report establishes that privilege escalation path for that documented deployment; it does not claim equivalent reachability for deployments that do not use `openvt -u` from a privileged `kbrequest`/init path.

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

Vendors

Redhat

Products

Enterprise Linux Hardened Images Hummingbird and 3 more

CVE-2026-58224

Samba: ctdb fails to do integrity checking of received packets

A flaw was found in Samba's CTDB, the clustered database service used by Samba. Insufficient integrity validation of received CTDB protocol packets allows malformed packets containing invalid field lengths, improperly terminated strings, or inconsistent packet sizes to be processed without adequate bounds checking. A remote attacker with access to the CTDB private network may trigger a denial of service through process crashes or excessive memory consumption and, in limited cases, disclose adjacent memory contents.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Redhat Samba

Products

Ceph Storage Enterprise Linux Openshift and 3 more