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              "value": "AV:A - sco_conn_ready runs from sco_connect_cfm via hci_connect_cfm on HCI Connection Complete, Synchronous Connection Complete, and deferred Connection Request for SCO/eSCO, driven by an in-range Bluetooth peer. Kernel CNA guidance classifies Bluetooth as Adjacent.\nAC:L - This is a use-after-free race between sco_conn_ready and sco_sock_release/sco_sock_kill. An attacker who times HCI SCO completion against socket close (rapid peer establish/teardown or concurrent connect/close) controls both sides and can retry until the window is hit; CONFIG_BT_BREDR defaults to y.\nPR:N - Incoming SCO is accepted when any listen socket exists (typical HFP/audio daemons on phones) with no Linux credentials required of the peer. sco_sock_create has no capability check, and listener close can occur from automatic bluetoothd/PipeWire teardown during connection setup.\nUI:N - No victim action is required at exploit time. OS Bluetooth audio stacks keep SCO listeners and manage sockets during normal headset, hands-free, and automotive operation while peer-initiated SCO/eSCO traffic is processed.\nS:U - The use-after-free corrupts in-kernel Bluetooth socket memory and can enable privilege escalation within the same host kernel security authority. It does not cross a VM, container, or IOMMU boundary.\nC:H - Use-after-free of struct sock after sco_sock_kill lets an attacker reclaim the freed slab object and read kernel memory through subsequent sock operations, which per CNA guidance is High confidentiality impact.\nI:H - sco_conn_ready writes sk-\u003esk_state and makes an indirect call through sk-\u003esk_state_change on the freed sock, a standard kernel heap UAF primitive for arbitrary write and control-flow hijack, scored High per UAF guidance.\nA:H - lock_sock and subsequent sk field access on a freed socket cause a kernel oops or panic. Per CNA guidance any use-after-free is High availability impact even before full exploitation."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Handle negative S1 walk levels in VNCR TLB size evaluation\n\nComputing the effects of a TLB invalidation involves looking at\nthe size of the mapping cached by the TLB. For S1 mappings such as\nVNCR, this is deducted from the combination of the base granule size\nand the mapping level.\n\nHowever, this implies that the S1 MMU is *on*. When the MMU is off,\nwe indicate this with the level being set to a \"creative\" value of\n-127 (S1_MMU_DISABLED).\n\nThis ends-up being misinterpreted by pgshift_level_to_ttl() as it\ndoesn\u0027t handle negative levels at all (the level is immediately cast\nto a u8 and only the bottom two bits considered), leading to an\ninvalidation size of 0. Not helpful.\n\nTidy-up pgshift_level_to_ttl() to handle these negative levels, and\nttl_to_size() to always return SZ_1G when no valid TTL is present.\nThis allows the removal of open-coded checks for similar situations.\n\nNote that the check for a negative value not explicitely checking for\nS1_MMU_DISABLED is deliberate, so that actual negative levels introduced\nwith LVA2 and D128 can take the same path if we ever support them."
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              "value": "AV:L - A nested arm64 L1 hypervisor reaches the bug via KVM_RUN when host KVM handles VNCR_EL2 TLB invalidation (MMU notifiers, memslot unmap, or guest EL2 TLBI into kvm_invalidate_vncr_ipa/invalidate_vncr_va). This is local KVM ioctl/guest execution, not a network, adjacent-radio, or physical-device path.\nAC:L - An L1 guest deterministically clears SCTLR_EL2.M and programs TCR_EL2.TG0 to 16KB or 64KB so S1_MMU_DISABLED (-127) is mis-cast as walk level 1 and ttl_to_size() returns 0, skipping all VNCR invalidation. Nested virt on arm64 cloud hosts is an attacker-selectable deployment, not an uncontrollable race.\nPR:N - Exploitation requires no host root or init-namespace capabilities beyond running hypervisor code in a tenant KVM guest on an arm64 host with nested virtualization enabled; the attacker operates entirely from within their assigned VM, consistent with other arm64 KVM nested-virt CVE scoring.\nUI:N - No victim user or administrator action is required beyond the attacker operating their own nested-virtualization workload; SCTLR/TCR setup, VNCR faults, guest TLBI, and balloon or memslot-unmap MMU notifiers are fully attacker-driven.\nS:C - Missed VNCR invalidation leaves a writable host per-CPU fixmap covering a guest IPA after the backing page is unmapped, so host KVM keeps reading and writing reused host physical pages while emulating EL2 register state, crossing the guest-to-hypervisor security boundary.\nC:H - The stale VNCR pseudo-TLB retains the old HPA and is remapped with PAGE_KERNEL; after MMU-notifier unmap the host reads reused pages through the fixmap during VNCR/sysreg emulation, yielding a use-after-free disclosure primitive across guest and host memory.\nI:H - Hardware NV2 and kvm_map_l1_vncr() keep a writable kernel mapping of the stale HPA, so nested EL2 register writes land in pages the host already freed and reused, giving a use-after-free write primitive against host kernel or co-resident memory.\nA:H - Accessing an unmapped or reused HPA through the VNCR fixmap can oops or panic the host kernel, and corrupting reused host pages can hang or crash the hypervisor and co-resident VMs; the attacker can retrigger the missed-invalidation sequence."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: vnifilter: enforce exact length of GROUP/GROUP6 attributes\n\nThe VXLAN VNI filter entry policy declares the GROUP/GROUP6 address\nattributes as NLA_BINARY with only a maximum length, so validate_nla()\naccepts a payload shorter than the address. The GROUP consumer reads it\nwith nla_get_in_addr(), an unconditional 4-byte load, so a short\nattribute over-reads up to 3 bytes of uninitialised slab data, which are\nstored into remote_ip and echoed back via RTM_GETTUNNEL, disclosing\nkernel memory.\n\nSwitch both entries to NLA_POLICY_EXACT_LEN() so the validator rejects\nany GROUP/GROUP6 that is not exactly 4 / 16 bytes; a valid address is\nalways sent at full width."
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          "url": "https://git.kernel.org/stable/c/47bfcc871576eaef6c8edab6749acd4b317306ea"
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        },
        {
          "url": "https://git.kernel.org/stable/c/984f831dda31b3a18f47454cf64989f65402879e"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89776",
    "datePublished": "2026-09-16T08:48:17.084Z",
    "dateReserved": "2026-09-11T19:38:34.765Z",
    "dateUpdated": "2026-10-19T08:52:28.559Z",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/pci: clear vdev-\u003emsi_perm after freeing it on init failure\n\nvfio_msi_cap_len() lazily allocates the per-device MSI permission table:\n\n\tvdev-\u003emsi_perm = kmalloc_obj(struct perm_bits, GFP_KERNEL_ACCOUNT);\n\tif (!vdev-\u003emsi_perm)\n\t\treturn -ENOMEM;\n\n\tret = init_pci_cap_msi_perm(vdev-\u003emsi_perm, len, flags);\n\tif (ret) {\n\t\tkfree(vdev-\u003emsi_perm);\n\t\treturn ret;\t\t/* vdev-\u003emsi_perm left dangling */\n\t}\n\nWhen init_pci_cap_msi_perm() -\u003e alloc_perm_bits() fails with -ENOMEM, the\nerror path frees vdev-\u003emsi_perm but leaves the freed pointer stored in\nit. vdev-\u003emsi_perm is not re-zeroed later because struct\nvfio_pci_core_device is per-device and persists across open/close cycles,\nand the vfio_config_init() error path returns without calling\nvfio_config_free(). So the dangling pointer outlives the failed open.\n\nThat leads to two use-after-frees on the same device:\n\n1. Reuse. The next vfio_config_init() sees the stale pointer at\n   \"if (vdev-\u003emsi_perm) return len;\" and reuses the freed object. MSI\n   config accesses in vfio_pci_config_rw_single() then dereference and\n   call the freed perm-\u003ereadfn / perm-\u003ewritefn function pointers.\n\n2. Double free. A later vfio_config_free() runs free_perm_bits() and\n   kfree() on the already-freed object.\n\nFix it by NULLing vdev-\u003emsi_perm after the kfree(), matching the\nNULL-after-free discipline already used in free_perm_bits() and\nvfio_config_free().\n\n  BUG: KASAN: slab-use-after-free in vfio_pci_config_rw_single (drivers/vfio/pci/vfio_pci_config.c:1961)\n  Read of size 8 at addr ffff88800fcc88d0 by task exploit/143\n  Call Trace:\n   ...\n   kasan_report (mm/kasan/report.c:595)\n   vfio_pci_config_rw_single (drivers/vfio/pci/vfio_pci_config.c:1961)\n   vfio_pci_config_rw (drivers/vfio/pci/vfio_pci_config.c:1986)\n   vfio_pci_rw (drivers/vfio/pci/vfio_pci_core.c:1599)\n   vfs_read (fs/read_write.c:572)\n   __x64_sys_pread64 (fs/read_write.c:764)\n   do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n   ...\n\nFollowed on device close by a double free of the same object:\n\n  Oops: general protection fault, probably for non-canonical address\n    0x1f63e0e8000008: 0000 [#1] SMP KASAN NOPTI\n  RIP: 0010:kfree (mm/slub.c:6711)\n  Call Trace:\n   vfio_config_free (drivers/vfio/pci/vfio_pci_config.c:1861)\n   vfio_pci_core_disable (drivers/vfio/pci/vfio_pci_core.c:685)\n   vfio_pci_core_close_device (drivers/vfio/pci/vfio_pci_core.c:777)\n   vfio_df_close (drivers/vfio/vfio_main.c:602)\n   vfio_device_fops_release (drivers/vfio/vfio_main.c:648)\n   __fput (fs/file_table.c:512)\n   __x64_sys_close (fs/open.c:1496)\n   do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n   ...\n  Kernel panic - not syncing: Fatal exception"
        }
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      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The UAF is reached only via local VFIO char-device operations: open of /dev/vfio/$GROUP or /dev/vfio/devices/vfioN, then pread/pwrite of the PCI config region through vfio_pci_core_read/write into vfio_pci_config_rw_single(). There is no network or packet path into vfio_msi_cap_len().\nAC:L - After any failed vfio_config_init() plants the dangling vdev-\u003emsi_perm, the attacker retries GET_DEVICE_FD/BIND_IOMMUFD on the same persistent vdev and deterministically calls the freed perm-\u003ereadfn/writefn via MSI config accesses. The attacker controls that open/read sequence; no victim race or uncontrolled layout is required.\nPR:L - vfio_pci_core_enable() and vfio_pci_config_rw() have no capable() check on the normal IOMMU path (CAP_SYS_RAWIO is only for noiommu). Access is gated by /dev/vfio node permissions, which libvirt, kubevirt, and cloud GPU/NIC passthrough routinely grant to an unprivileged qemu user or tenant.\nUI:N - The attacker performs the VFIO open, retry, and MSI config-space pread/pwrite themselves. Prior admin binding of the PCI device to vfio-pci is deployment configuration, not victim interaction during exploitation.\nS:C - struct vfio_pci_core_device persists across open/close, so a failed open can leave a dangling msi_perm that a later tenant VM reuses. QEMU services guest PCI config cycles with VFIO pread/pwrite, so a passthrough guest can invoke the freed host function pointers and cross the VFIO/IOMMU guest-to-host boundary.\nC:H - The next successful open reuses the freed perm_bits and MSI config reads call perm-\u003ereadfn on that object. Reclaiming the slab slot yields an arbitrary kernel-read primitive, which CVSS kernel guidance scores High for use-after-free.\nI:H - MSI config writes call the freed perm-\u003ewritefn, and a later close double-frees the same object in vfio_config_free(). That UAF/double-free of a structure with function pointers is exploitable for arbitrary kernel write and control-flow hijack.\nA:H - The report shows a KASAN slab-use-after-free in vfio_pci_config_rw_single() followed by a general-protection fault in kfree() during vfio_config_free() that panics the host, so availability impact is a kernel oops/panic."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "url": "https://git.kernel.org/stable/c/dc77acfeb979dded39b247b60fef0399536bfa77"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89777",
    "datePublished": "2026-09-16T08:48:17.754Z",
    "dateReserved": "2026-09-11T19:38:34.765Z",
    "dateUpdated": "2026-10-19T08:52:29.546Z",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nisofs: fix out-of-bounds page array access on empty zisofs block\n\nzisofs_uncompress_block()\u0027s empty-block fast path returns\npcount \u003c\u003c PAGE_SHIFT, ignoring the incoming poffset, unlike the\ndecompression path which returns bytes produced relative to poffset.\nzisofs_fill_pages() uses that return to advance its page cursor, so when\nthe zisofs block size is below PAGE_SIZE and a sub-page block leaves\npoffset partway into a page, a following empty block over-counts and\nadvances pages[] one element past its end, after which\n\"if (poffset \u0026\u0026 *pages)\" reads pages[1] out of bounds.  rock.c only\nrejects a block-size shift \u003e 17, so a crafted \"ZF\" Rock Ridge record can\nset it below PAGE_SHIFT; the bug is reached by an ordinary read() of a\ncompressed file on such a mounted ISO9660 image.\n\nReturn the byte count relative to poffset and zero only\n[poffset, PAGE_SIZE) of the first page, matching the decompression path.\nThe page-aligned case (poffset == 0) is unaffected.\n\n  BUG: KASAN: slab-out-of-bounds in zisofs_read_folio (fs/isofs/compress.c:290)\n  Read of size 8 at addr ffff88800f5eac48 by task exploit/142\n   zisofs_read_folio (fs/isofs/compress.c:290)\n   read_pages (mm/readahead.c:184)\n   ...\n   filemap_read (mm/filemap.c:2814)\n   vfs_read (fs/read_write.c:574)\n   __x64_sys_pread64 (fs/read_write.c:769)\n   do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n  The buggy address is located 0 bytes to the right of the\n  allocated 8-byte region in the kmalloc-8 cache"
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              "value": "AV:N - ntfs3 registers export_operations and an empty-prefix xattr handler, so ksmbd SMB2 QUERY_INFO FILE_FULL_EA and nfsd GETXATTR reach vfs_getxattr\u2192ntfs_getxattr\u2192ntfs_get_ea on an exported NTFS volume; a crafted EA named user.* is listed and returned over the network on NAS/hybrid SMB/NFS servers.\nAC:L - The attacker fully controls on-disk EA_FULL fields; ef-\u003esize=24 with elength=0xffff passes ntfs_read_ea() and makes ntfs_get_ea() memcpy 65535 bytes past the kmalloc(info-\u003esize) object deterministically, with no race or attacker-uncontrollable layout.\nPR:N - The leak needs only read access to a file carrying the crafted EA: a ksmbd guest/anonymous client with FILE_READ_EA, an NFSv4 AUTH_SYS/guest GETXATTR, or automount of attacker media, with no local account or CAP_SYS_ADMIN on the host.\nUI:N - After the NTFS volume is mounted and exported\u2014the normal state for NAS, dual-boot, and automounted removable NTFS\u2014the attacker issues SMB QUERY_INFO, NFS GETXATTR, or getxattr(2) themselves; no further victim clicks, prompts, or confirmations are required.\nS:U - The slab over-read and heap leak occur in the host kernel ntfs3 xattr path under a single security authority; this is standard filesystem exploitation, not a VM escape, IOMMU/DMA bypass, or other cross-boundary breakout.\nC:H - ntfs_get_ea() copies attacker-chosen elength (up to 65535) bytes from past the kmalloc(info-\u003esize) EA buffer into the getxattr output that VFS, ksmbd, and nfsd return to the caller; a ~64KiB kernel-heap leak to userspace or a remote SMB/NFS client is Confidentiality High.\nI:N - The destination is sized from the probed elength (ksmbd/nfsd) or the caller-supplied size with an explicit len\u003esize ERANGE check, so this is a source over-read into a bounds-checked xattr buffer, not an out-of-bounds write, UAF, or control-flow hijack primitive.\nA:H - KASAN reports a 65535-byte slab-out-of-bounds read in ntfs_get_ea from an 84-byte kmalloc-96 object; that unbounded heap over-read can fault unmapped adjacent slab pages and oops or panic the kernel, which is Availability High."
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qualcomm: rmnet: restore skb-\u003edev on deaggregated frames\n\nrmnet_map_deaggregate() allocates each sub-frame with alloc_skb() and\nleaves skb-\u003edev NULL. __rmnet_map_ingress_handler() assigns\nskb-\u003edev = ep-\u003eegress_dev only on the data path, but a MAP command frame\nis dispatched to rmnet_map_command() before that, so rmnet_map_send_ack()\nruns netif_tx_lock(skb-\u003edev) on a NULL device. An unprivileged user\nreaches this by unsharing a user+net namespace, creating an rmnet link\nover a tap device with INGRESS_DEAGGREGATION and INGRESS_MAP_COMMANDS,\nand writing an aggregated frame carrying a flow-control command to the\ntap fd.\n\nRestore the assignment dropped by 378e25357ac7, so every skb leaving\nrmnet_map_deaggregate() has a valid device.\n\n  BUG: KASAN: null-ptr-deref in _raw_spin_lock (kernel/locking/spinlock.c:158)\n  Write of size 4 at addr 00000000000004b4 by task exploit/144\n  Call Trace:\n   _raw_spin_lock (kernel/locking/spinlock.c:158)\n   netif_tx_lock (net/sched/sch_generic.c:497)\n   rmnet_map_command (drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c:67)\n   rmnet_rx_handler (drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:125)\n   __netif_receive_skb_core.constprop.0 (net/core/dev.c:6103)\n   ...\n   __netif_receive_skb_one_core (net/core/dev.c:6214)\n   netif_receive_skb (net/core/dev.c:6474)\n   tun_get_user (drivers/net/tun.c:1966)\n   tun_chr_write_iter (drivers/net/tun.c:2012)\n   vfs_write (fs/read_write.c:687)\n   ksys_write (fs/read_write.c:739)\n   do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n  Kernel panic - not syncing: Fatal exception in interrupt"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix out-of-bounds read in read_log_rec_buf()\n\nread_log_rec_buf() copies a log record into a caller buffer starting at\n\n\tu32 off = lsn_to_page_off(log, lsn) + log-\u003erecord_header_len;\n\nlog-\u003erecord_header_len (and log-\u003edata_off, used for the following pages)\ncomes verbatim from the on-disk restart area and is only checked for\n8-byte alignment in is_rst_area_valid(), so off can exceed\nlog-\u003epage_size. \"tail = log-\u003epage_size - off\" then underflows and\nmemcpy() reads past the page_size-sized buffer returned by\nread_log_page(), spilling adjacent slab memory into the replay buffer.\n\nThis is reachable by mounting a crafted NTFS image:\n\n BUG: KASAN: slab-out-of-bounds in read_log_rec_buf+0x216/0x580\n Read of size 64 at addr ffff88800a877ff8 by task exploit/127\n  read_log_rec_buf fs/ntfs3/fslog.c:2299\n  log_replay fs/ntfs3/fslog.c:4216\n  ntfs_loadlog_and_replay fs/ntfs3/fsntfs.c:324\n  ntfs_fill_super fs/ntfs3/super.c:1392\n  get_tree_bdev_flags fs/super.c:1694\n  __x64_sys_mount fs/namespace.c:4360\n The buggy address is located 4088 bytes to the right of\n the 4096-byte region [ffff88800a876000, ffff88800a877000)\n\nReject an in-page offset outside the current page before the copy.\n\n[almaz.alexandrovich@paragon-software.com: replaced the \u003e= sign with \u003e]"
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              "value": "AV:L - The OOB read is reached only while mounting a local NTFS volume (path_mount\u2192ntfs_fill_super\u2192ntfs_loadlog_and_replay\u2192log_replay\u2192read_rst_area/find_log_rec\u2192read_log_rec_buf). ksmbd/nfsd never parse $LogFile; journal replay runs at fill_super, not while serving exported files.\nAC:L - rec_hdr_len and data_off in the on-disk restart area are attacker-controlled and only checked for 8-byte alignment, so off=lsn_to_page_off()+record_header_len (and later data_off) can exceed page_size. The u32 tail underflow and memcpy past the kmalloc(page_size) log page are deterministic with no race.\nPR:N - No account or privilege on the victim is required: a crafted NTFS volume on USB/removable media, a disk image, or shared storage is sufficient for udisks2/systemd automount or an administrator mount to run $LogFile replay as root.\nUI:N - Desktop, kiosk, automotive, and shared-workstation automounters mount attacker-supplied NTFS media and run log_replay() inside ntfs_fill_super() without the user opening files or confirming a dialog; attaching the crafted volume is sufficient.\nS:U - The slab out-of-bounds read occurs in the host kernel during ntfs3 journal replay in the mounting process; impact stays within one kernel security authority and is not a VM escape or IOMMU/DMA bypass.\nC:H - memcpy() copies attacker-chosen client_data_len bytes from past the page_size log-page slab into the replay buffer, spilling adjacent heap. client_data_len is only bounded by kmalloc success on the restart-area path, so this is an unbounded heap OOB read (Confidentiality High), not a few-byte leak.\nI:H - With a valid rec_hdr_len and oversized data_off, multi-page log records keep an attacker-controlled LOG_REC_HDR then fill the rest from adjacent slab (including same-size log pages from the crafted image). do_action then memmove()s that buffer into kmalloc\u0027d MFT and index objects, yielding kernel writes from attacker-influenced heap contents.\nA:H - An oversized rec_hdr_len or data_off plus a large client_data_len drives memcpy() far past the 4KiB log-page allocation into unmapped slab or guard pages, causing a kernel oops or panic on mount. The crash is repeatable on every mount of the crafted NTFS volume."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: reject restart table growth beyond U16_MAX entries\n\nDuring $LogFile replay, log_replay() indexes the transaction table by the\ntransact_id taken from the log record header.  check_log_rec() only\nverifies that transact_id is non-zero and properly aligned, not its\nmagnitude, so a crafted image can request an arbitrarily large index.\n\nalloc_rsttbl_from_idx() grows the table to cover that index via\nextend_rsttbl(), which passes the new entry count to init_rsttbl():\n\n\trt = init_rsttbl(esize, used + add);\n\nused + add is computed as u32 but init_rsttbl() takes a u16, and the\ncount is stored in struct RESTART_TABLE as a __le16.  When used + add\nexceeds U16_MAX it is truncated, init_rsttbl() allocates a table far\nsmaller than the index requires, and alloc_rsttbl_from_idx() then\ndereferences and writes at the original, untruncated offset -- an\nout-of-bounds access past the allocation, reachable by mounting a\ncrafted NTFS image.\n\n BUG: KASAN: use-after-free in alloc_rsttbl_from_idx (fs/ntfs3/fslog.c:950)\n Read of size 4 at addr ffff8880327ffff8 by task exploit\n  alloc_rsttbl_from_idx (fs/ntfs3/fslog.c:950)\n  log_replay (fs/ntfs3/fslog.c:4562)\n  ntfs_loadlog_and_replay (fs/ntfs3/fsntfs.c:324)\n  ntfs_fill_super (fs/ntfs3/super.c:1393)\n  get_tree_bdev_flags\n  vfs_get_tree\n  path_mount\n  __x64_sys_mount\n\nA restart table is limited to U16_MAX entries by its __le16 count, so a\nlarger growth request is invalid input.  Reject it in extend_rsttbl();\nall callers already handle a NULL return."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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              "value": "AV:L - The bug is reached only while mounting a local NTFS block or loop device: path_mount \u2192 ntfs_fill_super \u2192 ntfs_loadlog_and_replay \u2192 log_replay \u2192 alloc_rsttbl_from_idx. ksmbd/nfsd never parse $LogFile; journal replay runs at fill_super, not while serving exported files.\nAC:L - The attacker fully controls on-disk $LogFile LFS_RECORD_HDR.transact_id. check_log_rec() only requires it non-zero and TRANSACTION_ENTRY-aligned, so a crafted index with used+add \u003e U16_MAX truncates init_rsttbl() and hits the OOB access deterministically on mount with no race.\nPR:N - No account or privilege on the victim is required: a crafted NTFS volume on USB/removable media, a disk image, or shared storage is sufficient for udisks2/systemd automount or an administrator mount to run $LogFile replay as root.\nUI:N - Desktop, kiosk, automotive, and shared-workstation automounters mount attacker-supplied NTFS media and run log_replay() inside ntfs_fill_super() without the user opening files or confirming a dialog; attaching the crafted volume is sufficient to trigger the overflow.\nS:U - Heap out-of-bounds access and use-after-free occur in the host kernel during ntfs3 journal replay in the mounting process; impact stays within one kernel security authority and is not a VM escape or IOMMU/DMA bypass.\nC:H - After the truncated allocation, alloc_rsttbl_from_idx() reads a restart-table word at the original untruncated transact_id offset (KASAN use-after-free). That attacker-chosen heap index plus UAF of the freed old table enable arbitrary kernel memory disclosure.\nI:H - extend_rsttbl() memcpy\u0027s the old table into a truncated kmalloc buffer, then alloc_rsttbl_from_idx() memset\u0027s and writes RESTART_ENTRY_ALLOCATED at the untruncated offset, producing an OOB/UAF heap write that can corrupt adjacent slab objects for control-flow hijacking.\nA:H - KASAN reported use-after-free in alloc_rsttbl_from_idx() on mount of a crafted NTFS image; the out-of-bounds heap access during log replay can oops or panic the kernel and is repeatable on every mount of the malicious volume."
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          "url": "https://git.kernel.org/stable/c/339e59996ff193adcf1c438cf05f19e753beb3a7"
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          "url": "https://git.kernel.org/stable/c/be218a01aadffe33ed4fc73e25276d676ebbd09d"
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        },
        {
          "url": "https://git.kernel.org/stable/c/111f8d74a19d85942ecbb3aba78f6f3c88e59391"
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      ],
      "title": "fs/ntfs3: reject restart table growth beyond U16_MAX entries",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89782",
    "datePublished": "2026-09-16T08:48:21.093Z",
    "dateReserved": "2026-09-11T19:38:34.765Z",
    "dateUpdated": "2026-10-19T08:52:34.456Z",
    "state": "PUBLISHED"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full\n\nThe depth check in xfrm6_input_addr() is off by one:\n\n  if (1 + sp-\u003elen == XFRM_MAX_DEPTH)\n          goto drop;\n  ...\n  sp-\u003exvec[sp-\u003elen++] = x;\n\nxfrm_input() can leave sp-\u003elen == XFRM_MAX_DEPTH, and the transport-mode\nreceive path re-enters IPv6 input via xfrm_trans_reinject() with that\nsecpath preserved. If the inner packet carries a destination-options HAO\noption or a type-2 routing header, xfrm6_input_addr() is called with\nsp-\u003elen == XFRM_MAX_DEPTH; the check (1 + 6 == 6) is false, so\nsp-\u003exvec[sp-\u003elen++] writes one slot past the 6-element xvec[]. The write\nstays within the sec_path allocation (invisible to KASAN); UBSAN_BOUNDS\nflags it and panics under panic_on_warn.\n\nUse \"sp-\u003elen \u003e= XFRM_MAX_DEPTH\", matching xfrm_input(). This also\nrestores one chain level the old check rejected at sp-\u003elen == 5.\n\n  UBSAN: array-index-out-of-bounds in net/ipv6/xfrm6_input.c:309:10\n  index 6 is out of range for type \u0027xfrm_state *[6]\u0027"
        }
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            "baseSeverity": "CRITICAL",
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            {
              "lang": "en",
              "value": "AV:N - The bug is on the IPv6 receive path: remote ESP/AH packets are processed by xfrm_input() until the secpath is full, then xfrm_trans_reinject() re-enters ip6_rcv_finish so an inner destopt HAO or type-2 routing header reaches xfrm6_input_addr() on internet-facing IPsec/MIP6 VPN and home-agent endpoints.\nAC:L - Once a max-depth transport-mode IPsec bundle and a MIP6 destopt or routing state are present, a peer sending nested IPsec then an inner HAO or type-2 RH deterministically bypasses the off-by-one check (1+6!=6) and writes xvec[6]; no race or attacker-uncontrollable layout is required.\nPR:N - No local account or capability on the victim is required. A remote IPsec/MIP6 peer triggers the overflow with packets accepted by already-installed SAs; creating those SAs is a deployment precondition rather than attacker privilege on the host.\nUI:N - Packets are processed in NAPI/softirq and the deferred xfrm_trans_reinject workqueue with no victim action such as mounting a filesystem, opening a file, or otherwise interacting with the host.\nS:U - The out-of-bounds write corrupts the skb sec_path in the host kernel that processed the packet; this is standard kernel memory corruption, not a VM escape, IOMMU bypass, or other cross-authority boundary.\nC:H - The overflow writes a kernel xfrm_state pointer past xvec[] into the adjacent xfrm_offload object and sets len to 7, so later xvec walks and teardown treat that overlapping memory as a state pointer, giving a memory-corruption disclosure primitive.\nI:H - This is an out-of-bounds write of a kernel pointer one slot past the 6-element xvec[] into ovec, which per kernel CVSS guidance is high integrity impact and can be shaped toward control-flow hijacking.\nA:H - UBSAN_BOUNDS flags the overflow and panics under panic_on_warn, and the corrupted sec_path (len=7 overlapping ovec) can oops during later xvec iteration or skb_ext teardown, fully denying availability."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/91fc387f63c00ddfb5221127a17bac97549a8343"
        },
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          "url": "https://git.kernel.org/stable/c/68e8737fe8e72f085c608cff322b3d2de8340af1"
        },
        {
          "url": "https://git.kernel.org/stable/c/8fe2c53fb81f5ad5be43af2ad09583f7c78b4b77"
        },
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          "url": "https://git.kernel.org/stable/c/bdcda866c89f9a8b1acdabf02d26cde9fbe501d8"
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      "title": "xfrm6: fix out-of-bounds write in xfrm6_input_addr() when secpath is full",
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