Threats Tagged 'cve-2026-52933'

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: rxrpc: Fix potential UAF after skb_unshare() failure (CVE-2026-45998) * kernel: smb/client: fix out-of-bounds read in smb2_compound_op() (CVE-2026-46155) * kernel: io_uring/poll: fix signed comparison in io_poll_get_ownership() (CVE-2026-52933) * kernel: zram: fix use-after-free in zram_bvec_write_partial() (CVE-2026-53185) * kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info() (CVE-2026-53196) * kernel: scsi: target: iscsi: Validate CHAP_R length before base64 decode (CVE-2026-63886) * kernel: i2c: stub: Reject I2C block transfers with invalid length (CVE-2026-64191) * kernel: posix-cpu-timers: Prevent UAF caused by non-leader exec() race (CVE-2026-64560) Bug Fix(es) and Enhancement(s): * [HPEMC RHEL 9 BUG] tick/sched: Limit non-timkeeper CPUs calling jiffies upda [rhel-9.6.z] (JIRA:RHEL-141460) * ibmveth Adapter Freeze with Small MSS [rhel-9.6.z] (JIRA:RHEL-178307) * RT scheduler livelock caused by missing backport of 94894c9c477e [rhel-9.6.z] (JIRA:RHEL-244409) 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: can: bcm: add locking for bcm_op runtime updates (CVE-2025-38004) * kernel: ipv6: add NULL checks for idev in SRv6 paths (CVE-2026-23442) * kernel: udp: Fix wildcard bind conflict check when using hash2 (CVE-2026-31503) * kernel: ipv6: prevent possible UaF in addrconf_permanent_addr() (CVE-2026-43339) * kernel: tcp: call sk_data_ready() after listener migration (CVE-2026-46015) * kernel: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP (CVE-2026-46266) * kernel: flow_dissector: do not dissect PPPoE PFC frames (CVE-2026-46306) * kernel: io_uring/poll: fix signed comparison in io_poll_get_ownership() (CVE-2026-52933) * kernel: ppp: require CAP_NET_ADMIN in target netns for unattached ioctls (CVE-2026-53075) * kernel: KVM: arm64: Take the SRCU lock for page table walks in fault injection and AT emulation (CVE-2026-53277) * kernel: ipv6: sit: reload inner IPv6 header after GSO offloads (CVE-2026-53228) * kernel: net: add pskb_may_pull() to skb_gro_receive_list() (CVE-2026-53235) * kernel: net: guard timestamp cmsgs to real error queue skbs (CVE-2026-53223) * kernel: ipv6: mcast: Fix use-after-free when processing MLD queries (CVE-2026-53275) * kernel: ipv6: anycast: insert aca into global hash under idev->lock (CVE-2026-53259) * kernel: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() (CVE-2026-64002) * kernel: vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu() (CVE-2026-63993) * kernel: fuse: clear intr_entry in fuse_resend and fuse_remove_pending_req (CVE-2026-64265) * kernel: nvmet-auth: validate reply message payload bounds against transfer length (CVE-2026-64319) * kernel: KVM: arm64: Bound used_lrs when flushing the pKVM hyp vCPU (CVE-2026-64287) * kernel: rhashtable: clear stale iter->p on table restart (CVE-2026-64563) * kernel: smb: client: fix double-free in SMB2_close() replay (CVE-2026-64597) Bug Fix(es) and Enhancement(s): * Customer needs "netfilter: nfnetlink_queue: optimize verdict lookup with hash table" patch [RHEL 10.2] (JIRA:RHEL-132852) 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 io_uring subsystem was fixed by correcting a signed comparison in the io_poll_get_ownership() function. The flaw caused the slowpath to never trigger when a cancel flag was set, due to signed integer arithmetic treating the flag as a negative value. This could lead to improper handling of poll_refs and potentially compromise system behavior. The issue affects numerous Linux kernel versions prior to 7.0.0-27.27 and related builds. The vulnerability has a high severity score of 7.8 and impacts confidentiality, integrity, and availability. The vendor has released official fixes in Linux kernel version 7.0.0-27.27 and later, requiring system updates and reboots. Users must recompile third-party kernel modules due to ABI changes. No known exploits are reported in the wild.