{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23429",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:46.016Z",
        "datePublished": "2026-04-03T15:15:15.856Z",
        "dateUpdated": "2026-08-05T12:21:42.311Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:21:42.311Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/sva: Fix crash in iommu_sva_unbind_device()\n\ndomain->mm->iommu_mm can be freed by iommu_domain_free():\n  iommu_domain_free()\n    mmdrop()\n      __mmdrop()\n        mm_pasid_drop()\nAfter iommu_domain_free() returns, accessing domain->mm->iommu_mm may\ndereference a freed mm structure, leading to a crash.\n\nFix this by moving the code that accesses domain->mm->iommu_mm to before\nthe call to iommu_domain_free()."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The vulnerable `iommu_sva_unbind_device()` path is reached through local character/DRM/UIO accelerator device open and release paths, not by remote packets or adjacent-link traffic.\nAC:L - The attacker can deterministically create the lifetime pattern with normal open/fork/exit/close or file-descriptor transfer so the bound `mm` is finally dropped during unbind; no uncontrollable race is required.\nPR:L - The attacker needs local access to an SVA-capable user-exposed accelerator/UIO/idxd device node. The IOMMU SVA bind/unbind path itself has no CAP_* gate, and these devices are intended to be usable by local user processes.\nUI:N - Exploitation can be driven entirely by the attacker's own process and file descriptors. No separate victim action is required.\nS:U - The bug corrupts kernel memory from within a kernel subsystem and does not directly cross a VM, container, or IOMMU/DMA protection boundary. This is standard local kernel compromise scope.\nC:H - The stale `iommu_mm` object is used after it may be freed, and freed-object reuse can provide attacker-influenced data exposure primitives. Per the required guidance, use-after-free is scored as high confidentiality impact.\nI:H - The old code can perform list operations on freed memory after `iommu_domain_free()`, creating a plausible kernel heap/list corruption and arbitrary-write primitive. Per the required guidance, use-after-free is scored as high integrity impact.\nA:H - The documented failure mode is a kernel crash from dereferencing or manipulating freed `mm`/IOMMU SVA state. A kernel oops or panic is high availability impact."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/iommu/iommu-sva.c"
                    ],
                    "versions": [
                        {
                            "version": "9f0a7ab700f8620e433b05c57fbd26c92ea186d9",
                            "lessThan": "58abeb7b9562f25bdfa2f5ae5ce803eb02e74433",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e37d5a2d60a338c5917c45296bac65da1382eda5",
                            "lessThan": "f5daaa2c959d9f894fb5b1ab76da8612dd220a0d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e37d5a2d60a338c5917c45296bac65da1382eda5",
                            "lessThan": "06e14c36e20b48171df13d51b89fe67c594ed07a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.18.7",
                            "lessThan": "6.18.20",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/iommu/iommu-sva.c"
                    ],
                    "versions": [
                        {
                            "version": "6.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.20",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.10",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18.7",
                                    "versionEndExcluding": "6.18.20"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.19",
                                    "versionEndExcluding": "6.19.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.19",
                                    "versionEndExcluding": "7.0"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/58abeb7b9562f25bdfa2f5ae5ce803eb02e74433"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f5daaa2c959d9f894fb5b1ab76da8612dd220a0d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/06e14c36e20b48171df13d51b89fe67c594ed07a"
                }
            ],
            "title": "iommu/sva: Fix crash in iommu_sva_unbind_device()",
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}