Threats Tagged 'cve-2026-52993'

A high severity vulnerability (CVE-2026-22984) in the Linux kernel's libceph component was resolved by adding explicit bounds checking to prevent potential out-of-bounds reads in the handle_auth_done() function. This vulnerability could lead to serious impacts including confidentiality, integrity, and availability violations. The issue affects multiple Linux kernel versions prior to specific patched releases. Ubuntu has released security updates addressing this and numerous other kernel vulnerabilities. Users are advised to update to the fixed kernel versions and reboot their systems. Due to ABI changes, recompilation of third-party kernel modules may be necessary.

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: fanotify: fix false positive on permission events (CVE-2026-46150) * kernel: netfilter: nat: use kfree_rcu to release ops (CVE-2026-53000) * kernel: tipc: fix double-free in tipc_buf_append() (CVE-2026-52993) * kernel: scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd() (CVE-2026-63888) * kernel: scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf (CVE-2026-63887) * kernel: Kernel: Remote out-of-bounds write in RDMA/siw (CVE-2026-64268) * kernel: sctp: don't free the ASCONF's own transport in DEL-IP processing (CVE-2026-64564) Bug Fix(es) and Enhancement(s): * WARNING: CPU: 5 PID: 20420 at net/core/stream.c:206 sk_stream_kill_queues+0xd2/0xe0 (JIRA:RHEL-256439) * Backport 3e684903a857 - kpatch transition stalls on KVM vCPU threads running guest DPDK PMD [9.2.z] (JIRA:RHEL-258954) * Backport request 747f7a2901174 [rhel-9.2.z] (JIRA:RHEL-259005) 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.

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: rtnetlink: add missing netlink_ns_capable() check for peer netns (CVE-2026-31692) * kernel: fanotify: fix false positive on permission events (CVE-2026-46150) * kernel: netfilter: conntrack: remove sprintf usage (CVE-2026-53002) * kernel: tipc: fix double-free in tipc_buf_append() (CVE-2026-52993) * kernel: zram: fix use-after-free in zram_bvec_write_partial() (CVE-2026-53185) * kernel: scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd() (CVE-2026-63888) * kernel: scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf (CVE-2026-63887) * kernel: Kernel: Remote out-of-bounds write in RDMA/siw (CVE-2026-64268) * kernel: sctp: don't free the ASCONF's own transport in DEL-IP processing (CVE-2026-64564) 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 Linux kernel packages for Red Hat Enterprise Linux 8. These include issues such as missing capability checks, false positives on permission events, use-after-free, double-free, out-of-bounds write, and unsafe string operations. The update addresses several CVEs including CVE-2026-31692, CVE-2026-43116, CVE-2026-46150, CVE-2026-64530, among others. The kernel update is rated as important by Red Hat and requires a system reboot to take effect.

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.29.1 fixes various security issues: The following security issues were fixed: - CVE-2026-46150: fanotify: fix false positive on permission events (bsc#1267388). - CVE-2026-53360: KVM: SEV: Require in-GHCB scratch area if GHCB v2+ is in use (bsc#1270303). - CVE-2026-64423: ipv4: igmp: remove multicast group from hash table on device destruction (bsc#1275458). - CVE-2026-64561: KVM: x86: Check for invalid/obsolete root *after* making MMU pages available (Zapscape) (bsc#1273232). - CVE-2026-64564: sctp: don't free the ASCONF's own transport in DEL-IP processing (SCTPhantom) (bsc#1274074). - CVE-2026-68138: net/sched: serialize qdisc_rtab_list against concurrent get/put (bsc#1274942).

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 4.22.10. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:54768 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/4.22/html/release_notes/ Security Fix(es): * kernel: xen: AMD Zen 2 Processors: Privilege escalation via improper CPU cache isolation (CVE-2025-54518) * samba: Missing access check on reparse point operations (CVE-2026-1933) * sssd: sssd: sudo LDAP provider searches entire directory tree for sudoRole objects by default, enabling privilege escalation (CVE-2026-14474) * sg3_utils: sg3_utils: arbitrary command execution via udev property injection in sg_inq --export (CVE-2026-16313) * rsync: TOCTOU symlink race condition allowing local privilege escalation in daemon mode without chroot. (CVE-2026-29518) * unbound: Unbound: Denial of Service via excessive EDNS options (CVE-2026-41292) * vim: Vim: Arbitrary Code Execution via crafted directory names (CVE-2026-47162) * vim: Vim: Arbitrary code execution via crafted step-definition patterns (CVE-2026-47167) * vim: Vim: Arbitrary code execution via Python omni-completion (CVE-2026-52858) * acl: Symlink traversal privilege escalation via libacl functions (CVE-2026-54369) * vim: Vim: Arbitrary code execution via malicious docstrings in Python omni-completion (CVE-2026-57456) * openssh: OpenSSH: Use-after-free vulnerability during host key re-exchange on the client side (CVE-2026-60002) * kernel: KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O (CVE-2025-40026) * libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in init_unpack() (CVE-2026-14164) * sssd: sssd: GPO cache path traversal via unsanitized gPCFileSysPath allows Kerberos authentication bypass (CVE-2026-14476) * unbound: Unbound: Cache manipulation via 'ghost domain names' attack (CVE-2026-40622) * vim: Vim: Out-of-bounds Write in Spell File Word Count (CVE-2026-55693) * vim: Vim: Denial of Service via stack out-of-bounds write in spell_soundfold_sofo() (CVE-2026-57455) * vim: Vim: Arbitrary code execution via crafted PHP file in omni-completion (CVE-2026-59856) * vim: Vim: Arbitrary command execution via crafted tags file in C omni-completion (CVE-2026-59858) 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 4.22 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/4.22/html-single/updating_clusters/index#updating-cluster-cli.

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: ipc: limit next_id allocation to the valid ID range (CVE-2026-52923) * kernel: tipc: fix double-free in tipc_buf_append() (CVE-2026-52993) * kernel: net: sched: UAF via missing handler for TC_ACT_CONSUMED in tcf_qevent_handle () * kernel: net/sched: cls_api: Handle TC_ACT_CONSUMED in tcf_qevent_handle (CVE-2026-64530) 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.

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: net: bridge: use a stable FDB dst snapshot in RCU readers (CVE-2026-46086) * kernel: ipv6: fix possible UAF in icmpv6_rcv() (CVE-2026-53006) * kernel: tipc: fix double-free in tipc_buf_append() (CVE-2026-52993) * kernel: iommu/vt-d: Avoid NULL pointer dereference or refcount corruption (CVE-2026-53281) Bug Fix(es) and Enhancement(s): * rxrpc: Address CVE-2026-43500 [rhel-10.2.z] (JIRA:RHEL-178254) 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.

A vulnerability in the Linux kernel's Bluetooth HCI event handling allowed a short HCI event frame to reach a memory copy operation without proper bounds checking. This was due to the function hci_store_wake_reason() being called before minimum payload length checks. The issue was fixed by moving wake reason storage into validated event handlers and enforcing lock contracts to prevent improper access.

This security update provides a functional equivalent of RHSA-2026:39179. The original Red Hat(R) advisory is available from the Red Hat web site at https://access.redhat.com/errata/RHSA-2026:39179.