GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-80818 (GCVE-0-2026-80818)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:13 – Updated: 2026-09-04 15:13
VLAI
Title
iommu/tegra241-cmdqv: Fix CMD_SYNC use-after-free on teardown
Summary
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->cmdq.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+0x320/0x6fc (P) tegra241_vcmdq_hw_deinit+0x98/0x168 tegra241_vintf_hw_deinit+0x5c/0x1b0 tegra241_cmdqv_remove_vintf+0x34/0xec tegra241_cmdqv_remove+0x40/0x9c arm_smmu_impl_remove+0x20/0x30 devm_action_release+0x14/0x20 devres_release_all+0xa8/0x110 device_unbind_cleanup+0x18/0x84 really_probe+0x1f0/0x29c 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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7 , < d2ab08437e913d9e4dda4dfd0d327446ec8717fc (git)
Affected: 4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7 , < a94309bb99eaf0c6a2ace4927864486d19458eb5 (git)
Affected: 4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7 , < 5994617e09ee6016c1b094f29d9c85cac944b477 (git)
Affected: 4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7 , < 9ff145a25c5c8a26b06ef7cf558fb536b18bba6d (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.47 , ≤ 6.18.* (semver)
Unaffected: 7.1.11 , ≤ 7.1.* (semver)
Unaffected: 7.2.1 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c",
            "drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h",
            "drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d2ab08437e913d9e4dda4dfd0d327446ec8717fc",
              "status": "affected",
              "version": "4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7",
              "versionType": "git"
            },
            {
              "lessThan": "a94309bb99eaf0c6a2ace4927864486d19458eb5",
              "status": "affected",
              "version": "4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7",
              "versionType": "git"
            },
            {
              "lessThan": "5994617e09ee6016c1b094f29d9c85cac944b477",
              "status": "affected",
              "version": "4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7",
              "versionType": "git"
            },
            {
              "lessThan": "9ff145a25c5c8a26b06ef7cf558fb536b18bba6d",
              "status": "affected",
              "version": "4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c",
            "drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h",
            "drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.47",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.11",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.1",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/tegra241-cmdqv: Fix CMD_SYNC use-after-free on teardown\n\narm_smmu_impl_remove() is registered as a devres action in\narm_smmu_impl_probe(), before arm_smmu_init_queues() allocates\nsmmu-\u003ecmdq.q.base. On a devres unwind, whether a failed probe or an\nunbind, the queue is freed first and arm_smmu_impl_remove() then runs\ntegra241_cmdqv_remove_vintf(), whose VINTF deinit issues a CMD_SYNC on\nthe freed memory.\n\nObserved during testing with a QEMU hack that makes the VCMDQ fail to\nenable, so the impl reset fails and probe aborts into the devres unwind:\n\n platform NVDA200C:00: tegra241_cmdqv: VINTF0: VCMDQ0/LVCMDQ0: failed to enable, STATUS=0x00000000\n platform NVDA200C:00: tegra241_cmdqv: VINTF0: VCMDQ0/LVCMDQ0: GERRORN=0x0, GERROR=0x4, CONS=0x0\n platform NVDA200C:00: tegra241_cmdqv: VINTF0: VCMDQ0/LVCMDQ0: uncleared error detected, resetting\n arm-smmu-v3 arm-smmu-v3.0.auto: failed to reset impl\n arm-smmu-v3 arm-smmu-v3.0.auto: probe with driver arm-smmu-v3 failed with error -110\n Unable to handle kernel paging request at virtual address ffff8000891e0098\n ...\n Internal error: Oops: 0000000096000047 [#1] SMP\n ...\n Call trace:\n  arm_smmu_cmdq_issue_cmdlist+0x320/0x6fc (P)\n  tegra241_vcmdq_hw_deinit+0x98/0x168\n  tegra241_vintf_hw_deinit+0x5c/0x1b0\n  tegra241_cmdqv_remove_vintf+0x34/0xec\n  tegra241_cmdqv_remove+0x40/0x9c\n  arm_smmu_impl_remove+0x20/0x30\n  devm_action_release+0x14/0x20\n  devres_release_all+0xa8/0x110\n  device_unbind_cleanup+0x18/0x84\n  really_probe+0x1f0/0x29c\n\nDrop the VINTF deinit from tegra241_cmdqv_remove_vintf() so the unwind no\nlonger touches the freed queue. Quiesce the VINTFs earlier instead. Add a\ndevice_disable() impl op and run it from arm_smmu_disable_action() while\nthe CMDQ is still up. That handles a live unbind. A failed reset is already\nhandled because tegra241_vintf_hw_init() deinits the VINTF on its own error\npath. tegra241_cmdqv_remove_vintf() is also used by the iommufd viommu\ndestroy path, so quiesce there too."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T15:13:39.273Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d2ab08437e913d9e4dda4dfd0d327446ec8717fc"
        },
        {
          "url": "https://git.kernel.org/stable/c/a94309bb99eaf0c6a2ace4927864486d19458eb5"
        },
        {
          "url": "https://git.kernel.org/stable/c/5994617e09ee6016c1b094f29d9c85cac944b477"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ff145a25c5c8a26b06ef7cf558fb536b18bba6d"
        }
      ],
      "title": "iommu/tegra241-cmdqv: Fix CMD_SYNC use-after-free on teardown",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80818",
    "datePublished": "2026-09-04T15:13:39.273Z",
    "dateReserved": "2026-08-26T14:34:25.795Z",
    "dateUpdated": "2026-09-04T15:13:39.273Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-80818",
      "date": "2026-09-14",
      "epss": "0.00168",
      "percentile": "0.06363"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-80818\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-04T16:18:09.453\",\"lastModified\":\"2026-09-04T16:18:09.453\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\niommu/tegra241-cmdqv: Fix CMD_SYNC use-after-free on teardown\\n\\narm_smmu_impl_remove() is registered as a devres action in\\narm_smmu_impl_probe(), before arm_smmu_init_queues() allocates\\nsmmu-\u003ecmdq.q.base. On a devres unwind, whether a failed probe or an\\nunbind, the queue is freed first and arm_smmu_impl_remove() then runs\\ntegra241_cmdqv_remove_vintf(), whose VINTF deinit issues a CMD_SYNC on\\nthe freed memory.\\n\\nObserved during testing with a QEMU hack that makes the VCMDQ fail to\\nenable, so the impl reset fails and probe aborts into the devres unwind:\\n\\n platform NVDA200C:00: tegra241_cmdqv: VINTF0: VCMDQ0/LVCMDQ0: failed to enable, STATUS=0x00000000\\n platform NVDA200C:00: tegra241_cmdqv: VINTF0: VCMDQ0/LVCMDQ0: GERRORN=0x0, GERROR=0x4, CONS=0x0\\n platform NVDA200C:00: tegra241_cmdqv: VINTF0: VCMDQ0/LVCMDQ0: uncleared error detected, resetting\\n arm-smmu-v3 arm-smmu-v3.0.auto: failed to reset impl\\n arm-smmu-v3 arm-smmu-v3.0.auto: probe with driver arm-smmu-v3 failed with error -110\\n Unable to handle kernel paging request at virtual address ffff8000891e0098\\n ...\\n Internal error: Oops: 0000000096000047 [#1] SMP\\n ...\\n Call trace:\\n  arm_smmu_cmdq_issue_cmdlist+0x320/0x6fc (P)\\n  tegra241_vcmdq_hw_deinit+0x98/0x168\\n  tegra241_vintf_hw_deinit+0x5c/0x1b0\\n  tegra241_cmdqv_remove_vintf+0x34/0xec\\n  tegra241_cmdqv_remove+0x40/0x9c\\n  arm_smmu_impl_remove+0x20/0x30\\n  devm_action_release+0x14/0x20\\n  devres_release_all+0xa8/0x110\\n  device_unbind_cleanup+0x18/0x84\\n  really_probe+0x1f0/0x29c\\n\\nDrop the VINTF deinit from tegra241_cmdqv_remove_vintf() so the unwind no\\nlonger touches the freed queue. Quiesce the VINTFs earlier instead. Add a\\ndevice_disable() impl op and run it from arm_smmu_disable_action() while\\nthe CMDQ is still up. That handles a live unbind. A failed reset is already\\nhandled because tegra241_vintf_hw_init() deinits the VINTF on its own error\\npath. tegra241_cmdqv_remove_vintf() is also used by the iommufd viommu\\ndestroy path, so quiesce there too.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c\",\"drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h\",\"drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7\",\"lessThan\":\"d2ab08437e913d9e4dda4dfd0d327446ec8717fc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7\",\"lessThan\":\"a94309bb99eaf0c6a2ace4927864486d19458eb5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7\",\"lessThan\":\"5994617e09ee6016c1b094f29d9c85cac944b477\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4dc0d12474f9d4833c3dd96b73d61e406d3f5dc7\",\"lessThan\":\"9ff145a25c5c8a26b06ef7cf558fb536b18bba6d\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c\",\"drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h\",\"drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.17\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.17\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.47\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.11\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.1\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/5994617e09ee6016c1b094f29d9c85cac944b477\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9ff145a25c5c8a26b06ef7cf558fb536b18bba6d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a94309bb99eaf0c6a2ace4927864486d19458eb5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d2ab08437e913d9e4dda4dfd0d327446ec8717fc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-08T17:16:57Z",
      "cve": "CVE-2026-80818",
      "id": "CVE-2026-80818",
      "initial_release_date": "2026-09-05T00:26:46Z",
      "product_status:known_not_affected": "353",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80818",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80818.json",
      "version": "4"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.