{"id":"OESA-2025-1318","summary":"kernel security update","details":"The Linux Kernel, the operating system core itself.\r\n\r\nSecurity Fix(es):\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86/mmu: Zap _all_ roots when unmapping gfn range in TDP MMU\n\nZap both valid and invalid roots when zapping/unmapping a gfn range, as\nKVM must ensure it holds no references to the freed page after returning\nfrom the unmap operation.  Most notably, the TDP MMU doesn't zap invalid\nroots in mmu_notifier callbacks.  This leads to use-after-free and other\nissues if the mmu_notifier runs to completion while an invalid root\nzapper yields as KVM fails to honor the requirement that there must be\n_no_ references to the page after the mmu_notifier returns.\n\nThe bug is most easily reproduced by hacking KVM to cause a collision\nbetween set_nx_huge_pages() and kvm_mmu_notifier_release(), but the bug\nexists between kvm_mmu_notifier_invalidate_range_start() and memslot\nupdates as well.  Invalidating a root ensures pages aren't accessible by\nthe guest, and KVM won't read or write page data itself, but KVM will\ntrigger e.g. kvm_set_pfn_dirty() when zapping SPTEs, and thus completing\na zap of an invalid root _after_ the mmu_notifier returns is fatal.\n\n  WARNING: CPU: 24 PID: 1496 at arch/x86/kvm/../../../virt/kvm/kvm_main.c:173 [kvm]\n  RIP: 0010:kvm_is_zone_device_pfn+0x96/0xa0 [kvm]\n  Call Trace:\n   <TASK>\n   kvm_set_pfn_dirty+0xa8/0xe0 [kvm]\n   __handle_changed_spte+0x2ab/0x5e0 [kvm]\n   __handle_changed_spte+0x2ab/0x5e0 [kvm]\n   __handle_changed_spte+0x2ab/0x5e0 [kvm]\n   zap_gfn_range+0x1f3/0x310 [kvm]\n   kvm_tdp_mmu_zap_invalidated_roots+0x50/0x90 [kvm]\n   kvm_mmu_zap_all_fast+0x177/0x1a0 [kvm]\n   set_nx_huge_pages+0xb4/0x190 [kvm]\n   param_attr_store+0x70/0x100\n   module_attr_store+0x19/0x30\n   kernfs_fop_write_iter+0x119/0x1b0\n   new_sync_write+0x11c/0x1b0\n   vfs_write+0x1cc/0x270\n   ksys_write+0x5f/0xe0\n   do_syscall_64+0x38/0xc0\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n   </TASK>(CVE-2021-47639)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nubifs: skip dumping tnc tree when zroot is null\n\nClearing slab cache will free all znode in memory and make\nc->zroot.znode = NULL, then dumping tnc tree will access\nc->zroot.znode which cause null pointer dereference.(CVE-2024-58058)\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: Fix variable not being completed when function returns\n\nWhen cmd_alloc_index(), fails cmd_work_handler() needs\nto complete ent->slotted before returning early.\nOtherwise the task which issued the command may hang:\n\n   mlx5_core 0000:01:00.0: cmd_work_handler:877:(pid 3880418): failed to allocate command entry\n   INFO: task kworker/13:2:4055883 blocked for more than 120 seconds.\n         Not tainted 4.19.90-25.44.v2101.ky10.aarch64 #1\n   "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.\n   kworker/13:2    D    0 4055883      2 0x00000228\n   Workqueue: events mlx5e_tx_dim_work [mlx5_core]\n   Call trace:\n      __switch_to+0xe8/0x150\n      __schedule+0x2a8/0x9b8\n      schedule+0x2c/0x88\n      schedule_timeout+0x204/0x478\n      wait_for_common+0x154/0x250\n      wait_for_completion+0x28/0x38\n      cmd_exec+0x7a0/0xa00 [mlx5_core]\n      mlx5_cmd_exec+0x54/0x80 [mlx5_core]\n      mlx5_core_modify_cq+0x6c/0x80 [mlx5_core]\n      mlx5_core_modify_cq_moderation+0xa0/0xb8 [mlx5_core]\n      mlx5e_tx_dim_work+0x54/0x68 [mlx5_core]\n      process_one_work+0x1b0/0x448\n      worker_thread+0x54/0x468\n      kthread+0x134/0x138\n      ret_from_fork+0x10/0x18(CVE-2025-21662)","modified":"2026-03-11T07:06:46.597542Z","published":"2025-03-21T13:18:36Z","upstream":["CVE-2021-47639","CVE-2024-58058","CVE-2025-21662"],"database_specific":{"severity":"High"},"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1318"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-47639"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-58058"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21662"}],"affected":[{"package":{"name":"kernel","ecosystem":"openEuler:22.03-LTS-SP3","purl":"pkg:rpm/openEuler/kernel&distro=openEuler-22.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.10.0-254.0.0.157.oe2203sp3"}]}],"ecosystem_specific":{"x86_64":["kernel-5.10.0-254.0.0.157.oe2203sp3.x86_64.rpm","kernel-debuginfo-5.10.0-254.0.0.157.oe2203sp3.x86_64.rpm","kernel-debugsource-5.10.0-254.0.0.157.oe2203sp3.x86_64.rpm","kernel-devel-5.10.0-254.0.0.157.oe2203sp3.x86_64.rpm","kernel-headers-5.10.0-254.0.0.157.oe2203sp3.x86_64.rpm","kernel-source-5.10.0-254.0.0.157.oe2203sp3.x86_64.rpm","kernel-tools-5.10.0-254.0.0.157.oe2203sp3.x86_64.rpm","kernel-tools-debuginfo-5.10.0-254.0.0.157.oe2203sp3.x86_64.rpm","kernel-tools-devel-5.10.0-254.0.0.157.oe2203sp3.x86_64.rpm","perf-5.10.0-254.0.0.157.oe2203sp3.x86_64.rpm","perf-debuginfo-5.10.0-254.0.0.157.oe2203sp3.x86_64.rpm","python3-perf-5.10.0-254.0.0.157.oe2203sp3.x86_64.rpm","python3-perf-debuginfo-5.10.0-254.0.0.157.oe2203sp3.x86_64.rpm"],"src":["kernel-5.10.0-254.0.0.157.oe2203sp3.src.rpm"],"aarch64":["kernel-5.10.0-254.0.0.157.oe2203sp3.aarch64.rpm","kernel-debuginfo-5.10.0-254.0.0.157.oe2203sp3.aarch64.rpm","kernel-debugsource-5.10.0-254.0.0.157.oe2203sp3.aarch64.rpm","kernel-devel-5.10.0-254.0.0.157.oe2203sp3.aarch64.rpm","kernel-headers-5.10.0-254.0.0.157.oe2203sp3.aarch64.rpm","kernel-source-5.10.0-254.0.0.157.oe2203sp3.aarch64.rpm","kernel-tools-5.10.0-254.0.0.157.oe2203sp3.aarch64.rpm","kernel-tools-debuginfo-5.10.0-254.0.0.157.oe2203sp3.aarch64.rpm","kernel-tools-devel-5.10.0-254.0.0.157.oe2203sp3.aarch64.rpm","perf-5.10.0-254.0.0.157.oe2203sp3.aarch64.rpm","perf-debuginfo-5.10.0-254.0.0.157.oe2203sp3.aarch64.rpm","python3-perf-5.10.0-254.0.0.157.oe2203sp3.aarch64.rpm","python3-perf-debuginfo-5.10.0-254.0.0.157.oe2203sp3.aarch64.rpm"]},"database_specific":{"source":"https://repo.openeuler.org/security/data/osv/OESA-2025-1318.json"}}],"schema_version":"1.7.5"}