Threats Tagged 'cve-2026-2291'

Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the container images for Red Hat OpenShift Container Platform 4.17.57. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHSA-2026:60018 Space precludes documenting all of the container images in this advisory. See the following Release Notes documentation, which will be updated shortly for this release, for details about these changes: https://docs.redhat.com/en/documentation/openshift_container_platform/4.17/html/release_notes/ Security Fix(es): * kernel: Arm Processors: Privilege escalation or information disclosure via writes to higher exception level resources (CVE-2025-10263) * kernel: xen: AMD Zen 2 Processors: Privilege escalation via improper CPU cache isolation (CVE-2025-54518) * bind: BIND: Denial of Service via maliciously crafted DNSSEC-validated zone (CVE-2026-1519) * samba: Missing access check on reparse point operations (CVE-2026-1933) * samba: group policy certificate enrollment uses http:// without validation (CVE-2026-3012) * samba: Remote Code Execution in SAMR (CVE-2026-4408) * sssd: sssd: sudo LDAP provider searches entire directory tree for sudoRole objects by default, enabling privilege escalation (CVE-2026-14474) * gnutls: GnuTLS: Denial of Service via DTLS zero-length fragment (CVE-2026-33845) * gnutls: GnuTLS: Denial of Service via heap buffer overflow in DTLS handshake fragment reassembly (CVE-2026-33846) * vim: arbitrary command execution via modeline sandbox bypass (CVE-2026-34982) * gnutls: gnutls: Denial of Service via DTLS packet reordering vulnerability (CVE-2026-42009) * gnutls: gnutls: Authentication Bypass via NUL Character in Username (CVE-2026-42010) * kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath (CVE-2026-43112) * icu: Stack buffer overflow in the SRBRoot::addTag function (CVE-2025-5222) * kernel: KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O (CVE-2025-40026) * samba: vfs_worm does not block directory modification (CVE-2026-2340) * gnutls: GnuTLS: Policy bypass due to case-sensitive nameConstraints comparison (CVE-2026-3833) * gnutls: gnutls: Information disclosure via heap overread in RSA key exchange (CVE-2026-5260) * glibc: glibc: Heap Buffer Overflow in `scanf` with `%mc` format specifier and large width (CVE-2026-5450) * sssd: sssd: GPO cache path traversal via unsanitized gPCFileSysPath allows Kerberos authentication bypass (CVE-2026-14476) * systemd: systemd: Arbitrary code execution or Denial of Service via spurious IPC API call data (CVE-2026-29111) * vim: zip.vim: Vim zip.vim plugin: Arbitrary file overwrite via path traversal bypass (CVE-2026-35177) * vim: Vim: Command injection allows arbitrary code execution via malicious tag files (CVE-2026-41411) * gnutls: gnutls: Security bypass due to incorrect name constraint handling (CVE-2026-42011) * gnutls: gnutls: Certificate validation bypass due to oversized Subject Alternative Name (CVE-2026-42013) * vim: command injection when decompressing .tgz archives (CVE-2026-46483) * libsolv: Heap buffer overflow in libsolv repopagestore via unchecked decompression of malicious .solv page data (CVE-2026-48864) 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. All OpenShift Container Platform 4.17 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.17/html-single/updating_clusters/index#updating-cluster-cli.

The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server. Security Fix(es): * dnsmasq: dnsmasq: heap buffer overflow in cache via NAME_ESCAPE expansion (CVE-2026-2291) * dnsmasq: NSEC bitmap parsing infinite loop (CVE-2026-4890) * dnsmasq: RRSIG rdlen underflow leading to heap OOB read (CVE-2026-4891) * dnsmasq: DHCPv6 CLID buffer overflow in helper process (CVE-2026-4892) * dnsmasq: Broken ECS source validation bypass (CVE-2026-4893) 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.

Multiple security vulnerabilities have been identified and fixed in the dnsmasq packages used in Red Hat Enterprise Linux 9. These include heap buffer overflows, infinite loops, out-of-bounds reads, and validation bypasses affecting DNS and DHCP functionalities. The update addresses five CVEs: CVE-2026-2291, CVE-2026-4890, CVE-2026-4891, CVE-2026-4892, and CVE-2026-4893. Red Hat has released patches for affected versions to mitigate these issues.

The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server. Security Fix(es): * dnsmasq: dnsmasq: heap buffer overflow in cache via NAME_ESCAPE expansion (CVE-2026-2291) * dnsmasq: NSEC bitmap parsing infinite loop (CVE-2026-4890) * dnsmasq: RRSIG rdlen underflow leading to heap OOB read (CVE-2026-4891) * dnsmasq: DHCPv6 CLID buffer overflow in helper process (CVE-2026-4892) * dnsmasq: Broken ECS source validation bypass (CVE-2026-4893) * dnsmasq: extract_addresses() OOB read via malformed rdlen (CVE-2026-5172) 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.