{
  "cveId": "CVE-2022-48895",
  "url": "https://patchblox.com/security/cve/CVE-2022-48895",
  "summary": "CVE-2022-48895 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48895, released August 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  iommu/arm-smmu: Don\u0027t unregister on shutdown  Mi...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  iommu/arm-smmu: Don\u0027t unregister on shutdown  Michael Walle says he noticed the following stack trace while performing a shutdown with \u0022reboot -f\u0022. He suggests he got \u0022lucky\u0022 and just hit the correct spot for the reboot while there was a packet transmission in flight.  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000098 CPU: 0 PID: 23 Comm: kworker/0:1 Not tainted 6.1.0-rc5-00088-gf3600ff8e322 #1930 Hardware name: Kontron KBox A-230-LS (DT) pc : iommu_get_dma_domain\u002B0x14/0x20 lr : iommu_dma_map_page\u002B0x9c/0x254 Call trace:  iommu_get_dma_domain\u002B0x14/0x20  dma_map_page_attrs\u002B0x1ec/0x250  enetc_start_xmit\u002B0x14c/0x10b0  enetc_xmit\u002B0x60/0xdc  dev_hard_start_xmit\u002B0xb8/0x210  sch_direct_xmit\u002B0x11c/0x420  __dev_queue_xmit\u002B0x354/0xb20  ip6_finish_output2\u002B0x280/0x5b0  __ip6_finish_output\u002B0x15c/0x270  ip6_output\u002B0x78/0x15c  NF_HOOK.constprop.0\u002B0x50/0xd0  mld_sendpack\u002B0x1bc/0x320  mld_ifc_work\u002B0x1d8/0x4dc  process_one_work\u002B0x1e8/0x460  worker_thread\u002B0x178/0x534  kthread\u002B0xe0/0xe4  ret_from_fork\u002B0x10/0x20 Code: d503201f f9416800 d503233f d50323bf (f9404c00) ---[ end trace 0000000000000000 ]--- Kernel panic - not syncing: Oops: Fatal exception in interrupt  This appears to be reproducible when the board has a fixed IP address, is ping flooded from another host, and \u0022reboot -f\u0022 is used.  The following is one more manifestation of the issue:  $ reboot -f kvm: exiting hardware virtualization cfg80211: failed to load regulatory.db arm-smmu 5000000.iommu: disabling translation sdhci-esdhc 2140000.mmc: Removing from iommu group 11 sdhci-esdhc 2150000.mmc: Removing from iommu group 12 fsl-edma 22c0000.dma-controller: Removing from iommu group 17 dwc3 3100000.usb: Removing from iommu group 9 dwc3 3110000.usb: Removing from iommu group 10 ahci-qoriq 3200000.sata: Removing from iommu group 2 fsl-qdma 8380000.dma-controller: Removing from iommu group 20 platform f080000.display: Removing from iommu group 0 etnaviv-gpu f0c0000.gpu: Removing from iommu group 1 etnaviv etnaviv: Removing from iommu group 1 caam_jr 8010000.jr: Removing from iommu group 13 caam_jr 8020000.jr: Removing from iommu group 14 caam_jr 8030000.jr: Removing from iommu group 15 caam_jr 8040000.jr: Removing from iommu group 16 fsl_enetc 0000:00:00.0: Removing from iommu group 4 arm-smmu 5000000.iommu: Blocked unknown Stream ID 0x429; boot with \u0022arm-smmu.disable_bypass=0\u0022 to allow, but this may have security implications arm-smmu 5000000.iommu:         GFSR 0x80000002, GFSYNR0 0x00000002, GFSYNR1 0x00000429, GFSYNR2 0x00000000 fsl_enetc 0000:00:00.1: Removing from iommu group 5 arm-smmu 5000000.iommu: Blocked unknown Stream ID 0x429; boot with \u0022arm-smmu.disable_bypass=0\u0022 to allow, but this may have security implications arm-smmu 5000000.iommu:         GFSR 0x80000002, GFSYNR0 0x00000002, GFSYNR1 0x00000429, GFSYNR2 0x00000000 arm-smmu 5000000.iommu: Blocked unknown Stream ID 0x429; boot with \u0022arm-smmu.disable_bypass=0\u0022 to allow, but this may have security implications arm-smmu 5000000.iommu:         GFSR 0x80000002, GFSYNR0 0x00000000, GFSYNR1 0x00000429, GFSYNR2 0x00000000 fsl_enetc 0000:00:00.2: Removing from iommu group 6 fsl_enetc_mdio 0000:00:00.3: Removing from iommu group 8 mscc_felix 0000:00:00.5: Removing from iommu group 3 fsl_enetc 0000:00:00.6: Removing from iommu group 7 pcieport 0001:00:00.0: Removing from iommu group 18 arm-smmu 5000000.iommu: Blocked unknown Stream ID 0x429; boot with \u0022arm-smmu.disable_bypass=0\u0022 to allow, but this may have security implications arm-smmu 5000000.iommu:         GFSR 0x00000002, GFSYNR0 0x00000000, GFSYNR1 0x00000429, GFSYNR2 0x00000000 pcieport 0002:00:00.0: Removing from iommu group 19 Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a8 pc : iommu_get_dma_domain\u002B0x14/0x20 lr : iommu_dma_unmap_page\u002B0x38/0xe0 Call trace:  iommu_get_dma_domain\u002B0x14/0x20  dma_unmap_page_attrs\u002B0x38/0x1d0  en ---truncated---",
  "published": "2024-08-21T07:15:05Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00209,
  "epssPercentile": 0.11057,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.7-1",
      "fix": "DEBIAN-CVE-2022-48895",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48895",
      "released": "2024-08-21T07:15:05Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.7-1",
      "fix": "DEBIAN-CVE-2022-48895",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48895",
      "released": "2024-08-21T07:15:05Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.7-1",
      "fix": "DEBIAN-CVE-2022-48895",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48895",
      "released": "2024-08-21T07:15:05Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}