CVE-2026-89452

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89452", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.706Z", "datePublished": "2026-09-11T19:43:17.405Z", "dateUpdated": "2026-10-30T12:31:44.077Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:31:44.077Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/msm: Unwind probe state on registration failure\n\nmsm_iommu_probe() adds its devm-managed IOMMU object to\nqcom_iommu_devices before adding the IOMMU sysfs device and registering\nit with the IOMMU core.\n\nIf iommu_device_sysfs_add() fails, probe returns with the object still on\nqcom_iommu_devices. The driver core then releases the devm allocation,\nleaving a dangling list entry that later list walks may dereference.\n\nIf iommu_device_register() fails, the same dangling list entry remains\nand the sysfs device is left registered as well.\n\nUnwind the sysfs device and global list entry in reverse setup order on\nthe corresponding failure paths."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is in msm_iommu_probe() for the Qualcomm APQ8064 platform IOMMU (compatible qcom,apq8064-iommu). It is reached only through the local platform driver core at boot or sysfs bind, not via network protocols, Bluetooth/WiFi, or a physical USB/serial endpoint.\nAC:L - After list_add, a failed iommu_device_sysfs_add() or iommu_device_register() deterministically leaves a freed msm_iommu_dev on qcom_iommu_devices. APQ8064 has four IOMMU instances, so a later probe, of_xlate, or attach walks that list and dereferences the object with no attacker-uncontrolled race. GFP_ATOMIC allocation in insert_iommu_master during register can induce the failure.\nPR:N - msm_iommu_probe() and later list walks in qcom_iommu_of_xlate(), find_iommu_for_dev(), and msm_iommu_attach_dev() run from the platform/IOMMU core with no capable() or credential check. On APQ8064 phones and embedded boards this happens automatically during boot or deferred probe without a user account.\nUI:N - Platform probe and subsequent IOMMU client attach/xlate run unattended during normal kernel device bring-up. No victim action such as mounting a filesystem, opening a file, or clicking a prompt is required.\nS:U - The use-after-free corrupts host kernel heap through the driver's private qcom_iommu_devices list, enabling in-kernel privilege escalation. It does not by itself escape a VM or bypass the IOMMU/DMA isolation boundary as a distinct security authority.\nC:H - The dangling msm_iommu_dev stays linked after devm frees it. Subsequent list walks dereference attacker-influencable freed heap (including embedded list pointers and device state), which per kernel UAF guidance enables arbitrary kernel memory disclosure.\nI:H - Use-after-free of the IOMMU instance structure (list nodes, MMIO base, context-bank maps) allows heap spraying and hijack of later attach/xlate control flow, providing an arbitrary kernel write and code-execution primitive.\nA:H - Any later walk of qcom_iommu_devices after the failed probe dereferences freed memory and can oops or panic the kernel. Kernel UAFs also crash even when not turned into a full exploit."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iommu/msm_iommu.c"], "versions": [{"version": "42df43b36163ed7d0ab13992e411093252903273", "lessThan": "51424c14dbdadc8c2ad4abf842265a50f69d78aa", "status": "affected", "versionType": "git"}, {"version": "42df43b36163ed7d0ab13992e411093252903273", "lessThan": "6a1ae472113762f794682229a0f233f1ee0f69a4", "status": "affected", "versionType": "git"}, {"version": "42df43b36163ed7d0ab13992e411093252903273", "lessThan": "51e37f9179387b6e3fa64a3d3b4fece1a38b3a02", "status": "affected", "versionType": "git"}, {"version": "42df43b36163ed7d0ab13992e411093252903273", "lessThan": "f532401be9312ecd166f616bb74a65b0b4c150fa", "status": "affected", "versionType": "git"}, {"version": "42df43b36163ed7d0ab13992e411093252903273", "lessThan": "7f7074a886c4a93e3d12076ce60a510a1ebe400c", "status": "affected", "versionType": "git"}, {"version": "42df43b36163ed7d0ab13992e411093252903273", "lessThan": "535a200220ca2c83bc8bf54bd2cbe045d6ee70c4", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iommu/msm_iommu.c"], "versions": [{"version": "4.11", "status": "affected"}, {"version": "0", "lessThan": "4.11", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "4.11", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/51424c14dbdadc8c2ad4abf842265a50f69d78aa"}, {"url": "https://git.kernel.org/stable/c/6a1ae472113762f794682229a0f233f1ee0f69a4"}, {"url": "https://git.kernel.org/stable/c/51e37f9179387b6e3fa64a3d3b4fece1a38b3a02"}, {"url": "https://git.kernel.org/stable/c/f532401be9312ecd166f616bb74a65b0b4c150fa"}, {"url": "https://git.kernel.org/stable/c/7f7074a886c4a93e3d12076ce60a510a1ebe400c"}, {"url": "https://git.kernel.org/stable/c/535a200220ca2c83bc8bf54bd2cbe045d6ee70c4"}], "title": "iommu/msm: Unwind probe state on registration failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/iommu/msm_iommu.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "51424c14dbdadc8c2ad4abf842265a50f69d78aa", "status": "affected", "version": "42df43b36163ed7d0ab13992e411093252903273", "versionType": "git"}, {"lessThan": "6a1ae472113762f794682229a0f233f1ee0f69a4", "status": "affected", "version": "42df43b36163ed7d0ab13992e411093252903273", "versionType": "git"}, {"lessThan": "51e37f9179387b6e3fa64a3d3b4fece1a38b3a02", "status": "affected", "version": "42df43b36163ed7d0ab13992e411093252903273", "versionType": "git"}, {"lessThan": "f532401be9312ecd166f616bb74a65b0b4c150fa", "status": "affected", "version": "42df43b36163ed7d0ab13992e411093252903273", "versionType": "git"}, {"lessThan": "7f7074a886c4a93e3d12076ce60a510a1ebe400c", "status": "affected", "version": "42df43b36163ed7d0ab13992e411093252903273", "versionType": "git"}, {"lessThan": "535a200220ca2c83bc8bf54bd2cbe045d6ee70c4", "status": "affected", "version": "42df43b36163ed7d0ab13992e411093252903273", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/iommu/msm_iommu.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.11"}, {"lessThan": "4.11", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/msm: Unwind probe state on registration failure\n\nmsm_iommu_probe() adds its devm-managed IOMMU object to\nqcom_iommu_devices before adding the IOMMU sysfs device and registering\nit with the IOMMU core.\n\nIf iommu_device_sysfs_add() fails, probe returns with the object still on\nqcom_iommu_devices. The driver core then releases the devm allocation,\nleaving a dangling list entry that later list walks may dereference.\n\nIf iommu_device_register() fails, the same dangling list entry remains\nand the sysfs device is left registered as well.\n\nUnwind the sysfs device and global list entry in reverse setup order on\nthe corresponding failure paths."}], "id": "CVE-2026-89452", "lastModified": "2026-10-30T13:20:16.490", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:19:25.843", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/51424c14dbdadc8c2ad4abf842265a50f69d78aa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/51e37f9179387b6e3fa64a3d3b4fece1a38b3a02"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/535a200220ca2c83bc8bf54bd2cbe045d6ee70c4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6a1ae472113762f794682229a0f233f1ee0f69a4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7f7074a886c4a93e3d12076ce60a510a1ebe400c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f532401be9312ecd166f616bb74a65b0b4c150fa"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Kernel: Memory corruption vulnerability in iommu/msm component", "id": "2532496", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532496"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the `iommu/msm` component of the Linux kernel. This vulnerability occurs when `msm_iommu_probe()` fails to properly unwind its probe state during registration, leaving a dangling list entry. A local attacker could potentially exploit this to cause a dereference of the dangling list entry, leading to system instability or a denial of service."], "name": "CVE-2026-89452", "public_date": "2026-09-11T19:43:17Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89452\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89452\nhttps://git.kernel.org/stable/c/535a200220ca2c83bc8bf54bd2cbe045d6ee70c4\nhttps://git.kernel.org/stable/c/7f7074a886c4a93e3d12076ce60a510a1ebe400c\nhttps://git.kernel.org/stable/c/f532401be9312ecd166f616bb74a65b0b4c150fa"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[42df43b36163ed7d0ab13992e411093252903273,f532401be9312ecd166f616bb74a65b0b4c150fa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[42df43b36163ed7d0ab13992e411093252903273,7f7074a886c4a93e3d12076ce60a510a1ebe400c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[42df43b36163ed7d0ab13992e411093252903273,535a200220ca2c83bc8bf54bd2cbe045d6ee70c4)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "4.11"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.11)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-13T08:45:12.080445+00:00", "updated": "2026-09-21T01:30:08.758638+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}