{
  "cveId": "CVE-2026-80818",
  "url": "https://patchblox.com/security/cve/CVE-2026-80818",
  "summary": "CVE-2026-80818 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2026-80818, released September 5, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  iommu/tegra241-cmdqv: Fix CMD_SYNC use-after-fre...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  iommu/tegra241-cmdqv: Fix CMD_SYNC use-after-free on teardown  arm_smmu_impl_remove() is registered as a devres action in arm_smmu_impl_probe(), before arm_smmu_init_queues() allocates smmu-\u003Ecmdq.q.base. On a devres unwind, whether a failed probe or an unbind, the queue is freed first and arm_smmu_impl_remove() then runs tegra241_cmdqv_remove_vintf(), whose VINTF deinit issues a CMD_SYNC on the freed memory.  Observed during testing with a QEMU hack that makes the VCMDQ fail to enable, so the impl reset fails and probe aborts into the devres unwind:   platform NVDA200C:00: tegra241_cmdqv: VINTF0: VCMDQ0/LVCMDQ0: failed to enable, STATUS=0x00000000  platform NVDA200C:00: tegra241_cmdqv: VINTF0: VCMDQ0/LVCMDQ0: GERRORN=0x0, GERROR=0x4, CONS=0x0  platform NVDA200C:00: tegra241_cmdqv: VINTF0: VCMDQ0/LVCMDQ0: uncleared error detected, resetting  arm-smmu-v3 arm-smmu-v3.0.auto: failed to reset impl  arm-smmu-v3 arm-smmu-v3.0.auto: probe with driver arm-smmu-v3 failed with error -110  Unable to handle kernel paging request at virtual address ffff8000891e0098  ...  Internal error: Oops: 0000000096000047 [#1] SMP  ...  Call trace:   arm_smmu_cmdq_issue_cmdlist\u002B0x320/0x6fc (P)   tegra241_vcmdq_hw_deinit\u002B0x98/0x168   tegra241_vintf_hw_deinit\u002B0x5c/0x1b0   tegra241_cmdqv_remove_vintf\u002B0x34/0xec   tegra241_cmdqv_remove\u002B0x40/0x9c   arm_smmu_impl_remove\u002B0x20/0x30   devm_action_release\u002B0x14/0x20   devres_release_all\u002B0xa8/0x110   device_unbind_cleanup\u002B0x18/0x84   really_probe\u002B0x1f0/0x29c  Drop the VINTF deinit from tegra241_cmdqv_remove_vintf() so the unwind no longer touches the freed queue. Quiesce the VINTFs earlier instead. Add a device_disable() impl op and run it from arm_smmu_disable_action() while the CMDQ is still up. That handles a live unbind. A failed reset is already handled because tegra241_vintf_hw_init() deinits the VINTF on its own error path. tegra241_cmdqv_remove_vintf() is also used by the iommufd viommu destroy path, so quiesce there too.",
  "published": "2026-09-04T16:18:09Z",
  "severity": "important",
  "epss": 0.00209,
  "epssPercentile": 0.11084,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-6.18.48-107.148",
      "release": "amzn 2023",
      "fixedVersion": "1:1.0-0.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-aarch64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-debuginfo-common-x86_64",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-headers",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-modules-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
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      "product": "kernel6.18-modules-extra-common",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel6.18-tools-devel",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.12-1",
      "fix": "DEBIAN-CVE-2026-80818",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80818",
      "released": "2026-09-05T01:57:10Z"
    },
    {
      "platform": "linux",
      "product": "microvm-kernel6.18",
      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
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      "product": "perf6.18",
      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
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      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
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      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
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      "release": "amzn 2023",
      "fixedVersion": "1:6.18.48-107.148.amzn2023",
      "fix": "ALAS2023-2026-3139",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3139",
      "released": "2026-09-28T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}