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              "baseScore": 5.5,
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              "confidentialityImpact": "NONE",
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              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
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              "version": "3.1"
            }
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              "content": {
                "id": "CVE-2022-49670",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
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                  {
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                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:33:21.787883Z",
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              "type": "ssvc"
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                "description": "CWE-369 Divide By Zero",
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlinux/dim: Fix divide by 0 in RDMA DIM\n\nFix a divide 0 error in rdma_dim_stats_compare() when prev-\u003ecpe_ratio ==\n0.\n\nCallTrace:\n  Hardware name: H3C R4900 G3/RS33M2C9S, BIOS 2.00.37P21 03/12/2020\n  task: ffff880194b78000 task.stack: ffffc90006714000\n  RIP: 0010:backport_rdma_dim+0x10e/0x240 [mlx_compat]\n  RSP: 0018:ffff880c10e83ec0 EFLAGS: 00010202\n  RAX: 0000000000002710 RBX: ffff88096cd7f780 RCX: 0000000000000064\n  RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001\n  RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000\n  R10: 0000000000000000 R11: 0000000000000000 R12: 000000001d7c6c09\n  R13: ffff88096cd7f780 R14: ffff880b174fe800 R15: 0000000000000000\n  FS:  0000000000000000(0000) GS:ffff880c10e80000(0000)\n  knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 00000000a0965b00 CR3: 000000000200a003 CR4: 00000000007606e0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  PKRU: 55555554\n  Call Trace:\n   \u003cIRQ\u003e\n   ib_poll_handler+0x43/0x80 [ib_core]\n   irq_poll_softirq+0xae/0x110\n   __do_softirq+0xd1/0x28c\n   irq_exit+0xde/0xf0\n   do_IRQ+0x54/0xe0\n   common_interrupt+0x8f/0x8f\n   \u003c/IRQ\u003e\n   ? cpuidle_enter_state+0xd9/0x2a0\n   ? cpuidle_enter_state+0xc7/0x2a0\n   ? do_idle+0x170/0x1d0\n   ? cpu_startup_entry+0x6f/0x80\n   ? start_secondary+0x1b9/0x210\n   ? secondary_startup_64+0xa5/0xb0\n  Code: 0f 87 e1 00 00 00 8b 4c 24 14 44 8b 43 14 89 c8 4d 63 c8 44 29 c0 99 31 d0 29 d0 31 d2 48 98 48 8d 04 80 48 8d 04 80 48 c1 e0 02 \u003c49\u003e f7 f1 48 83 f8 0a 0f 86 c1 00 00 00 44 39 c1 7f 10 48 89 df\n  RIP: backport_rdma_dim+0x10e/0x240 [mlx_compat] RSP: ffff880c10e83ec0"
        }
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          "cvssV3_1": {
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The vulnerable rdma_dim() path runs while processing in-kernel CQ completions for RDMA ULPs such as ksmbd SMB Direct, NFS/RDMA (svcrdma), and NVMe-oF RDMA, which accept remote peers over RoCE/iWARP (layer-3+). A remote client\u2019s RDMA traffic drives ib_poll_handler/ib_cq_poll_work into the buggy stats compare.\nAC:L - The attacker controls connection rate and completion volume; under load, sample windows can yield prev-\u003ecpe_ratio==0 (including via delta_us==0 leaving uninitialized stats that are then stored), so the divide-by-zero is reliably inducible without relying on victim-side chance.\nPR:N - Kernel CQs with DIM are created at RDMA CM accept for these servers, and completions are processed before application-level authentication (SMB session, NFS export auth, NVMe auth), so an unauthenticated network peer can reach the code.\nUI:N - No victim user action is required; connecting and generating RDMA completions against an exposed RDMA service is sufficient.\nS:U - A kernel oops/panic affects only the local kernel\u2019s availability authority; there is no VM/IOMMU/sandbox boundary crossing.\nC:N - This is a pure arithmetic divide-by-zero exception with no memory read, leak, or corruption primitive.\nI:N - There is no out-of-bounds write, UAF, or other memory corruption that could alter data or hijack control flow\u2014only a crash.\nA:H - Division by zero in softirq/workqueue CQ polling oopses the kernel (as in the reported call trace) and can panic the host, fully denying availability."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:56:00.433Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/5af106f8e072aebd88b95e164a08fa320651a99a"
        },
        {
          "url": "https://git.kernel.org/stable/c/fae2a9fb1eaf348ad8732f90d42ebbb971bd7e95"
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        {
          "url": "https://git.kernel.org/stable/c/0b6e0eb5c45e79e9095de2498cc0ca5ec563fc5e"
        },
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          "url": "https://git.kernel.org/stable/c/7c1963391af51ee322378d1b2849c60e9037f069"
        },
        {
          "url": "https://git.kernel.org/stable/c/0fe3dbbefb74a8575f61d7801b08dbc50523d60d"
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      ],
      "title": "linux/dim: Fix divide by 0 in RDMA DIM",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49670",
    "datePublished": "2025-02-26T02:24:03.938Z",
    "dateReserved": "2025-02-26T02:21:30.436Z",
    "dateUpdated": "2026-08-05T08:56:00.433Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: 6fire: fix use-after-free on disconnect\n\nIn usb6fire_chip_abort(), the chip struct is allocated as the card\u0027s\nprivate data (via snd_card_new with sizeof(struct sfire_chip)).  When\nsnd_card_free_when_closed() is called and no file handles are open, the\ncard and embedded chip are freed synchronously.  The subsequent\nchip-\u003ecard = NULL write then hits freed slab memory.\n\nCall trace:\n  usb6fire_chip_abort sound/usb/6fire/chip.c:59 [inline]\n  usb6fire_chip_disconnect+0x348/0x358 sound/usb/6fire/chip.c:182\n  usb_unbind_interface+0x1a8/0x88c drivers/usb/core/driver.c:458\n  ...\n  hub_event+0x1a04/0x4518 drivers/usb/core/hub.c:5953\n\nFix by moving the card lifecycle out of usb6fire_chip_abort() and into\nusb6fire_chip_disconnect().  The card pointer is saved in a local\nbefore any teardown, snd_card_disconnect() is called first to prevent\nnew opens, URBs are aborted while chip is still valid, and\nsnd_card_free_when_closed() is called last so chip is never accessed\nafter the card may be freed."
        }
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nzram: fix use-after-free in zram_bvec_write_partial()\n\nzram_read_page() picks the sync or async backing device read path based on\nwhether the parent bio is NULL.  zram_bvec_write_partial() passes its\nparent bio down, so for ZRAM_WB slots the read is dispatched\nasynchronously and zram_read_page() returns 0 while the bio is still in\nflight.  The caller then runs memcpy_from_bvec(), zram_write_page() and\n__free_page() on the buffer, leaving the async read to write into a freed\npage.\n\nzram_bvec_read_partial() was switched to NULL in commit 4e3c87b9421d\n(\"zram: fix synchronous reads\") for the same reason; the write_partial\ncounterpart was missed."
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              "value": "AV:L - Reachability is through local block-device or filesystem I/O that submits writes to a zram device. There is no network, adjacent, or physical transport path into this driver code.\nAC:L - On affected non-4K-page zram writeback deployments, the attacker can create partial bio_vec writes and target ZRAM_WB slots without winning a race. The bug is a deterministic asynchronous lifetime error once that normal writeback state exists.\nPR:L - zram_submit_bio() and zram_open() add no kernel capability check; access is governed by the device node or a mounted zram-backed filesystem. A normal local user with write access to such storage can trigger the vulnerable I/O path, while admin-only setup is an environmental prerequisite.\nUI:N - No victim action is needed after the attacker has local write access to the zram-backed storage. The attacker directly submits or induces the partial write.\nS:U - The corruption occurs in kernel memory within the same host security authority. It is not a VM escape, IOMMU bypass, or cross-scope boundary violation.\nC:H - This is a kernel use-after-free of a page later written by asynchronous backing-device I/O. Under the required overestimation rule, such memory corruption is treated as capable of enabling high-impact information disclosure.\nI:H - The freed page can be reallocated before the asynchronous I/O completes, causing kernel memory to be overwritten. That supports high integrity impact due to potential arbitrary corruption or code execution primitives.\nA:H - The UAF can corrupt live kernel memory and readily cause an oops, panic, or hang. Repeated local triggering can therefore cause high availability impact."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        {
          "url": "https://git.kernel.org/stable/c/77a602b505ce4802915853cfc435a4722fab3e64"
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          "url": "https://git.kernel.org/stable/c/c96786d6ff1acc1d54d9241e97767554c1dfdd5b"
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        },
        {
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    "cveId": "CVE-2026-53185",
    "datePublished": "2026-06-25T08:38:58.853Z",
    "dateReserved": "2026-06-09T07:44:35.390Z",
    "dateUpdated": "2026-09-09T12:05:07.476Z",
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: stub: Reject I2C block transfers with invalid length\n\nThe I2C_SMBUS_I2C_BLOCK_DATA case in stub_xfer() uses data-\u003eblock[0]\nas the transfer length. The existing check only clamps it to avoid\noverrunning the chip-\u003ewords[256] register array, but does not validate\nit against I2C_SMBUS_BLOCK_MAX (32), which is the limit of the union\ni2c_smbus_data.block buffer (34 bytes total). The driver is a\ndevelopment/test tool (CONFIG_I2C_STUB=m, not built by default)\nthat must be loaded with a chip_addr= parameter.\n\nA local user with access to /dev/i2c-* can issue an I2C_SMBUS ioctl\nwith I2C_SMBUS_I2C_BLOCK_DATA and data-\u003eblock[0] \u003e 32, causing\nstub_xfer() to read or write past the end of the union\ni2c_smbus_data.block buffer:\n\n BUG: KASAN: stack-out-of-bounds in stub_xfer (drivers/i2c/i2c-stub.c:223)\n Read of size 1 at addr ffff88800abcfd92 by task exploit/81\n Call Trace:\n  \u003cTASK\u003e\n  stub_xfer (drivers/i2c/i2c-stub.c:223)\n  __i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:593)\n  i2c_smbus_xfer (drivers/i2c/i2c-core-smbus.c:536)\n  i2cdev_ioctl_smbus (drivers/i2c/i2c-dev.c:391)\n  i2cdev_ioctl (drivers/i2c/i2c-dev.c:478)\n  __x64_sys_ioctl (fs/ioctl.c:583)\n  do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n  \u003c/TASK\u003e\n\nThe bug exists because i2c-stub implements .smbus_xfer directly,\nbypassing the I2C_SMBUS_BLOCK_MAX validation in\ni2c_smbus_xfer_emulated(). The I2C_SMBUS_BLOCK_DATA case in the same\nfunction correctly validates against I2C_SMBUS_BLOCK_MAX, but the\nI2C_SMBUS_I2C_BLOCK_DATA case does not.\n\nFix by rejecting transfers with data-\u003eblock[0] == 0 or\ndata-\u003eblock[0] \u003e I2C_SMBUS_BLOCK_MAX with -EINVAL, consistent with\nboth the I2C_SMBUS_BLOCK_DATA case in the same function and the\nI2C_SMBUS_I2C_BLOCK_DATA validation in i2c_smbus_xfer_emulated()."
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            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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              "lang": "en",
              "value": "AV:L - The vulnerable path is reached by a local process issuing I2C_SMBUS ioctls on an i2c-stub /dev/i2c-* character device; it is neither remotely nor physically reachable.\nAC:L - Once i2c-stub is loaded, the attacker controls the address, direction, length, and register contents, making the corruption deterministic without a race. The non-default module configuration defines the vulnerable deployment rather than complicating exploitation within it.\nPR:L - The attacker needs unprivileged local access to the applicable /dev/i2c-* node, but no capability or namespace-specific administrative privilege is checked anywhere along the ioctl path.\nUI:N - After the vulnerable adapter is configured, exploitation requires only attacker-issued ioctls and no action by another user.\nS:U - The corruption occurs within the host kernel and represents conventional local privilege escalation, without crossing a separate virtualization or hardware security authority.\nC:H - An oversized block write reads up to 222 bytes beyond the 34-byte stack union and persists those bytes in attacker-readable stub registers, enabling substantial kernel-stack disclosure.\nI:H - An oversized block read writes up to 222 attacker-chosen bytes beyond the stack union because the attacker can prepopulate the stub registers, enabling control-data corruption and potential kernel code execution.\nA:H - The controlled stack overwrite can corrupt stack canaries, return state, or other control data, causing a repeatable kernel oops or panic even when code execution is unsuccessful."
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      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:39:59.861Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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