Threats Tagged 'cve-2026-53362'

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.

In the Linux kernel, the following vulnerability has been resolved: ipv6: account for fraggap on the paged allocation path In __ip6_append_data(), when the paged-allocation branch is taken (MSG_MORE / NETIF_F_SG / large fraglen), alloclen and pagedlen are computed as alloclen = fragheaderlen + transhdrlen; pagedlen = datalen - transhdrlen; datalen already includes fraggap (datalen = length + fraggap). When fraggap is non-zero, this is not the first skb and transhdrlen is zero. The fraggap bytes carried over from the previous skb are copied just past the fragment headers in the new skb's linear area. The linear area is therefore undersized by fraggap bytes while pagedlen is overstated by the same amount, and the copy writes past skb->end into the trailing skb_shared_info. An unprivileged user can trigger this via a UDPv6 socket using MSG_MORE together with MSG_SPLICE_PAGES. The bad accounting was introduced by commit 773ba4fe9104 ("ipv6: avoid partial copy for zc"). Before commit ce650a166335 ("udp6: Fix __ip6_append_data()'s handling of MSG_SPLICE_PAGES"), the negative copy value caused -EINVAL to be returned. That later commit allowed MSG_SPLICE_PAGES to proceed in this case, making the corruption triggerable. The non-paged branch sets alloclen to fraglen, which already accounts for fraggap because datalen does. Bring the paged branch in line by adding fraggap to alloclen and subtracting it from pagedlen. After this adjustment, copy no longer collapses to -fraggap on the paged path, so remove the stale comment describing that old arithmetic. Since a negative copy is no longer expected for a valid MSG_SPLICE_PAGES case, remove the MSG_SPLICE_PAGES exception from the negative copy check.

This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.53.66 fixes various security issues: The following security issues were fixed: - CVE-2025-40204,CVE-2026-53224,CVE-2026-53246: sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing (bsc#1253437 bsc#1270023 bsc#1270024). - CVE-2026-46242: eventpoll: fix ep_remove struct eventpoll / struct file UAF (bsc#1270300). - CVE-2026-52956: libceph: Fix potential out-of-bounds access in __ceph_x_decrypt() (bsc#1272139). - CVE-2026-64530: net/sched: cls_api: Handle TC_ACT_CONSUMED in tcf_qevent_hand (bsc#1271867). - CVE-2026-64600: xfs: resample the data fork mapping after cycling ILOCK (RefluXFS) (bsc#1271543).

This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a running kernel. This patch module is targeted for kernel-4.18.0-553.53.1.el8_10. Security Fix(es): * kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role (CVE-2026-53359) 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 is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a running kernel. This patch module is targeted for kernel-5.14.0-427.68.2.el9_4. Security Fix(es): * kernel: eventpoll: fix ep_remove struct eventpoll / struct file UAF (CVE-2026-46242) * kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role (CVE-2026-53359) 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 6.12.0-160000.32.1 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).

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.

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-2026-31505: 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 6.12.0-160000.33.1 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-2026-46243: 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).