Threats Tagged 'cve-2026-52909'

A vulnerability in the Linux kernel's IOMMU Shared Virtual Addressing (SVA) on x86 allows stale page table entries to persist after kernel page table pages are freed, causing use-after-free or write-after-free conditions. This can lead to privilege escalation or data corruption. The issue is mitigated by disabling SVA on affected systems until a patch is applied. A fix introducing deferred freeing of kernel page table pages to safely invalidate IOMMU caches is available and should be applied via system updates and reboot.

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: fanotify: fix false positive on permission events (CVE-2026-46150) * kernel: ip6_gre: Use cached t->net in ip6erspan_changelink() (CVE-2026-46120) * kernel: af_unix: Set gc_in_progress to true in unix_gc() (CVE-2026-53361) * kernel: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() (CVE-2026-64002) * kernel: net: bridge: stop fast-leave after deleting a port group (CVE-2026-74480) * kernel: packet: use consistent hard_header_len in non-ring send paths () * kernel: net: ipv6: use-after-free in fib6_rule_suppress due to stale res->rt6 pointer (CVE-2026-74581) Bug Fix(es) and Enhancement(s): * [kABI] protect struct alt_instr [rhel-10.0] (JIRA:RHEL-122758) 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.

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.34.1 fixes various security issues The following security issues were fixed: - CVE-2026-45970: bonding: alb: fix UAF in rlb_arp_recv during bond up/down (bsc#1267206). - CVE-2026-46120: ip6_gre: Use cached t->net in ip6erspan_changelink() (bsc#1267893). - CVE-2026-46173: exit: prevent preemption of oopsing TASK_DEAD task (bsc#1267723). - CVE-2026-46227: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (bsc#1267698). - CVE-2026-52909: ip6_vti: set netns_immutable on the fallback device (bsc#1268662). - CVE-2026-52943: net: skbuff: fix missing zerocopy reference in pskb_carve helpers (bsc#1269023). - CVE-2026-53362: ipv6: account for fraggap on the paged allocation path (bsc#1269495).

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.32.1 fixes various security issues The following security issues were fixed: - CVE-2026-31505: iavf: fix out-of-bounds writes in iavf_get_ethtool_stats() (bsc#1263094). - CVE-2026-31533: net/tls: fix use-after-free in -EBUSY error path of tls_do_encryption (bsc#1262759). - CVE-2026-31586: mm: blk-cgroup: fix use-after-free in cgwb_release_workfn() (bsc#1263177). - CVE-2026-31685: netfilter: ip6t_eui64: reject invalid MAC header for all packets (bsc#1263670). - CVE-2026-43025: netfilter: ctnetlink: ignore explicit helper on new expectations (bsc#1264253). - CVE-2026-43027: netfilter: nf_conntrack_helper: pass helper to expect cleanup (bsc#1264252). - CVE-2026-43037: ip6_tunnel: clear skb2->cb[] in ip4ip6_err() (bsc#1265197). - CVE-2026-43120: RDMA/irdma: Fix double free related to rereg_user_mr (bsc#1264567). - CVE-2026-43190: netfilter: xt_tcpmss: check remaining length before reading optlen (bsc#1264849). - CVE-2026-43366: io_uring/kbuf: check if target buffer list is still legacy on recycle (bsc#1265117). - CVE-2026-43494: RDS zerocopy attack aka PinTheft (bsc#1265945). - CVE-2026-43501: ipv6: rpl: reserve mac_len headroom when recompressed SRH grows (bsc#1266015). - CVE-2026-45970: bonding: alb: fix UAF in rlb_arp_recv during bond up/down (bsc#1267206). - CVE-2026-46120: ip6_gre: Use cached t->net in ip6erspan_changelink() (bsc#1267893). - CVE-2026-46173: exit: prevent preemption of oopsing TASK_DEAD task (bsc#1267723). - CVE-2026-46227: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (bsc#1267698). - CVE-2026-46243: smb: client: reject userspace cifs.spnego descriptions (CIFSwitch) (bsc#1266265). - CVE-2026-52909: ip6_vti: set netns_immutable on the fallback device (bsc#1268662). - CVE-2026-52943: net: skbuff: fix missing zerocopy reference in pskb_carve helpers (bsc#1269023). - CVE-2026-53362: ipv6: account for fraggap on the paged allocation path (bsc#1269495).

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.32.1 fixes various security issues The following security issues were fixed: - CVE-2026-31505: iavf: fix out-of-bounds writes in iavf_get_ethtool_stats() (bsc#1263094). - CVE-2026-31533: net/tls: fix use-after-free in -EBUSY error path of tls_do_encryption (bsc#1262759). - CVE-2026-31586: mm: blk-cgroup: fix use-after-free in cgwb_release_workfn() (bsc#1263177). - CVE-2026-31685: netfilter: ip6t_eui64: reject invalid MAC header for all packets (bsc#1263670). - CVE-2026-43025: netfilter: ctnetlink: ignore explicit helper on new expectations (bsc#1264253). - CVE-2026-43027: netfilter: nf_conntrack_helper: pass helper to expect cleanup (bsc#1264252). - CVE-2026-43037: ip6_tunnel: clear skb2->cb[] in ip4ip6_err() (bsc#1265197). - CVE-2026-43120: RDMA/irdma: Fix double free related to rereg_user_mr (bsc#1264567). - CVE-2026-43190: netfilter: xt_tcpmss: check remaining length before reading optlen (bsc#1264849). - CVE-2026-43366: io_uring/kbuf: check if target buffer list is still legacy on recycle (bsc#1265117). - CVE-2026-43494: RDS zerocopy attack aka PinTheft (bsc#1265945). - CVE-2026-43501: ipv6: rpl: reserve mac_len headroom when recompressed SRH grows (bsc#1266015). - CVE-2026-45970: bonding: alb: fix UAF in rlb_arp_recv during bond up/down (bsc#1267206). - CVE-2026-46120: ip6_gre: Use cached t->net in ip6erspan_changelink() (bsc#1267893). - CVE-2026-46173: exit: prevent preemption of oopsing TASK_DEAD task (bsc#1267723). - CVE-2026-46227: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (bsc#1267698). - CVE-2026-46243: smb: client: reject userspace cifs.spnego descriptions (CIFSwitch) (bsc#1266265). - CVE-2026-52909: ip6_vti: set netns_immutable on the fallback device (bsc#1268662). - CVE-2026-52943: net: skbuff: fix missing zerocopy reference in pskb_carve helpers (bsc#1269023). - CVE-2026-53362: ipv6: account for fraggap on the paged allocation path (bsc#1269495).

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.35.1 fixes various security issues The following security issues were fixed: - CVE-2026-46120: ip6_gre: Use cached t->net in ip6erspan_changelink() (bsc#1267893). - CVE-2026-46173: exit: prevent preemption of oopsing TASK_DEAD task (bsc#1267723). - CVE-2026-46227: sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (bsc#1267698). - CVE-2026-52909: ip6_vti: set netns_immutable on the fallback device (bsc#1268662). - CVE-2026-52943: net: skbuff: fix missing zerocopy reference in pskb_carve helpers (bsc#1269023). - CVE-2026-53362: ipv6: account for fraggap on the paged allocation path (bsc#1269495).

Multiple security vulnerabilities affecting the SUSE Linux Enterprise 15 SP4 RT kernel were addressed in a security update. The update fixes a range of issues including Bluetooth event handling, IPv6 ICMP error processing, use-after-free conditions, stale data exposure, buffer overflows, locking issues, and memory management bugs. These vulnerabilities impact kernel components such as Bluetooth, networking, crypto, KVM virtualization, and filesystem handling. The update mitigates these issues to improve system stability and security.

In the Linux kernel, the following vulnerability has been resolved: ip6_vti: set netns_immutable on the fallback device. john1988 and Noam Rathaus reported that vti6_init_net() does not set the netns_immutable flag on the per-netns fallback tunnel device (ip6_vti0). Other similar tunnel drivers (like ip6_tunnel, sit, ip6_gre, and ip_tunnel) correctly set this flag during their fallback device initialization to prevent them from being moved to another network namespace.

In the Linux kernel, the following vulnerability has been resolved: ip6_vti: set netns_immutable on the fallback device. john1988 and Noam Rathaus reported that vti6_init_net() does not set the netns_immutable flag on the per-netns fallback tunnel device (ip6_vti0). Other similar tunnel drivers (like ip6_tunnel, sit, ip6_gre, and ip_tunnel) correctly set this flag during their fallback device initialization to prevent them from being moved to another network namespace.