Threats Tagged 'cve-2026-46166'

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: smc: Fix use-after-free in __pnet_find_base_ndev() (CVE-2025-40064) * kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match() (CVE-2025-40168) * kernel: Linux kernel: Denial of Service in libceph OSD client due to unreset sparse-read state (CVE-2026-23136) * kernel: netfilter: ctnetlink: ensure safe access to master conntrack (CVE-2026-43116) * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158) * kernel: mm/page_alloc: clear page->private in free_pages_prepare() (CVE-2026-43303) * kernel: net/sched: act_pedit: extend the writable skb range per key (CVE-2026-46331) * kernel: Linux kernel: Use-After-Free in net/gro due to improper handling of zerocopy skbs (CVE-2026-46323) * kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions (CVE-2026-46243) * kernel: RDMA/iwcm: Fix workqueue list corruption by removing work_list (CVE-2026-45898) * kernel: wifi: mac80211: remove station if connection prep fails (CVE-2026-46125) * kernel: wifi: mac80211: use safe list iteration in radar detect work (CVE-2026-46166) Bug Fix(es) and Enhancement(s): * [RHEL-9] Performance impact of CVE-2025-38085 [rhel-9.6.z] (JIRA:RHEL-161145) * libceph: CEPH_CRYPTO_AES256KRB5 (--key-type aes256k) support [rhel-9.6.z] (JIRA:RHEL-168926) * [ice] 3 of 4 ports "Failed to set LAN Tx queue context, error: -22" [rhel-9.6.z] (JIRA:RHEL-175439) * Kernel panic while shutting down ice driver due to use-after-free [rhel-9.6.z] (JIRA:RHEL-177524) * rbd: eliminate a race in lock_dwork draining on unmap [rhel-9.6.z] (JIRA:RHEL-183129) 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.

In the Linux kernel, the following vulnerability has been resolved: can: isotp: fix tx.buf use-after-free in isotp_sendmsg() isotp_sendmsg() uses only cmpxchg() on so->tx.state to serialize access to so->tx.buf. isotp_release() waits for ISOTP_IDLE via wait_event_interruptible() and then calls kfree(so->tx.buf). If a signal interrupts the wait_event_interruptible() inside close() while tx.state is ISOTP_SENDING, the loop exits early and release proceeds to force ISOTP_SHUTDOWN and continues to kfree(so->tx.buf) while sendmsg may still be reading so->tx.buf for the final CAN frame in isotp_fill_dataframe(). The so->tx.buf can be allocated once when the standard tx.buf length needs to be extended. Move the kfree() of this potentially extended tx.buf to sk_destruct time when either isotp_sendmsg() and isotp_release() are done.

A use-after-free vulnerability in the Linux kernel's mac80211 WiFi subsystem was resolved by implementing safe list iteration in radar detect work. The issue arises because the call to ieee80211_dfs_cac_cancel can cause the iterated channel context to be freed and removed from the list, leading to a slab-use-after-free error. This vulnerability affects multiple Linux kernel versions prior to 7.0.0-28.28~24.04.1 and related builds. The vulnerability has a CVSS score of 8.8, indicating high severity, with potential impacts on confidentiality, integrity, and availability. A patch is available and included in updated Linux kernel packages. Users should apply the updates and reboot to mitigate the issue.

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: mptcp: fix slab-use-after-free in __inet_lookup_established (CVE-2026-31669) * kernel: xen/privcmd: fix double free via VMA splitting (CVE-2026-31787) * kernel: Buffer overflow in drivers/xen/sys-hypervisor.c (CVE-2026-31786) * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110) * kernel: netfilter: flowtable: strictly check for maximum number of actions (CVE-2026-43329) * kernel: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers (CVE-2026-46056) * kernel: wifi: mac80211: drop stray 'static' from fast-RX rx_result (CVE-2026-46152) * kernel: wifi: mac80211: remove station if connection prep fails (CVE-2026-46125) 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.