{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89510", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.716Z", "datePublished": "2026-09-11T19:43:55.989Z", "dateUpdated": "2026-09-13T06:30:14.790Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-13T06:30:14.790Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: Cancel reg_work before freeing device on remove\n\nc4iw_uld_state_change() queues reg_work to register the RDMA device.\nc4iw_remove() can free ctx->dev while this work is pending or running,\nleaving c4iw_register_device() accessing the freed device.\n\nCancel reg_work before removing the device. The registration work can\ntear down ctx->dev when registration fails, so do not unregister or\ndeallocate it again in that case.\n\nThis issue was found by an in-house static analysis tool."}], "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 UAF is reached from c4iw_remove() on local Chelsio T4/T5/T6 RDMA teardown (iw_cxgb4 rmmod, PCI sysfs unbind/hot-remove, EEH reset, or ULD STATE_DOWN/DETACH/FATAL). reg_work is queued from local STATE_UP (cxgb_open/uld_attach), not from c4iw_uld_rx_handler packet processing.\nAC:L - An attacker queues c4iw_register_device via STATE_UP (first cxgb_open or iw_cxgb4 load) then immediately runs c4iw_remove via unbind/rmmod/EEH, controlling both sides of the missing cancel_work_sync race and retrying bind/unbind until the worker uses freed ctx->dev; such UAFs score AC:L.\nPR:L - Per CNA driver-removal UAF precedent, an unprivileged local user on Chelsio iWARP/HPC hosts can spray the freed c4iw_dev/ib_device while privileged or automated teardown proceeds; init-namespace root is not required for the UAF itself.\nUI:N - No victim action such as mounting a filesystem or opening a file is required; the attacker queues reg_work and coordinates driver removal themselves, or piggybacks on routine PCI/module teardown.\nS:U - The use-after-free corrupts the host kernel c4iw_dev/ib_device heap object within the same security authority; it is not a VM escape, IOMMU/DMA isolation bypass, or sandbox breakout.\nC:H - After c4iw_dealloc()/ib_dealloc_device(), c4iw_register_device() still reads ctx->dev (node_guid, ports, ibdev ops) from the freed ib_device; this kernel heap UAF enables arbitrary disclosure via slab reuse.\nI:H - The dangling worker writes ibdev fields, may call ib_register_device() on freed memory, and can double-free via c4iw_dealloc(); heap spraying the ib_device ops table yields write and control-flow hijack primitives.\nA:H - Use-after-free of c4iw_dev from workqueue context during remove causes a kernel oops or panic even when not fully exploited, so availability impact is High."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/hw/cxgb4/device.c"], "versions": [{"version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5", "lessThan": "fe9c591026c576d8b1f72aab5e4cd67350530763", "status": "affected", "versionType": "git"}, {"version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5", "lessThan": "85f438382a865a4dc4c50e6b884310bb2b60fc4d", "status": "affected", "versionType": "git"}, {"version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5", "lessThan": "320e5258a53af0abc5abd9eb01519a48bab2dee8", "status": "affected", "versionType": "git"}, {"version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5", "lessThan": "a7100601aa1a39f799a566acce10db20eaf4b7f2", "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/infiniband/hw/cxgb4/device.c"], "versions": [{"version": "4.15", "status": "affected"}, {"version": "0", "lessThan": "4.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "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-rc1", "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": "4.15", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/fe9c591026c576d8b1f72aab5e4cd67350530763"}, {"url": "https://git.kernel.org/stable/c/85f438382a865a4dc4c50e6b884310bb2b60fc4d"}, {"url": "https://git.kernel.org/stable/c/320e5258a53af0abc5abd9eb01519a48bab2dee8"}, {"url": "https://git.kernel.org/stable/c/a7100601aa1a39f799a566acce10db20eaf4b7f2"}], "title": "RDMA/cxgb4: Cancel reg_work before freeing device on remove", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/cxgb4/device.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "fe9c591026c576d8b1f72aab5e4cd67350530763", "status": "affected", "version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5", "versionType": "git"}, {"lessThan": "85f438382a865a4dc4c50e6b884310bb2b60fc4d", "status": "affected", "version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5", "versionType": "git"}, {"lessThan": "320e5258a53af0abc5abd9eb01519a48bab2dee8", "status": "affected", "version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5", "versionType": "git"}, {"lessThan": "a7100601aa1a39f799a566acce10db20eaf4b7f2", "status": "affected", "version": "1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/cxgb4/device.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.15"}, {"lessThan": "4.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "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-rc1", "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\nRDMA/cxgb4: Cancel reg_work before freeing device on remove\n\nc4iw_uld_state_change() queues reg_work to register the RDMA device.\nc4iw_remove() can free ctx->dev while this work is pending or running,\nleaving c4iw_register_device() accessing the freed device.\n\nCancel reg_work before removing the device. The registration work can\ntear down ctx->dev when registration fails, so do not unregister or\ndeallocate it again in that case.\n\nThis issue was found by an in-house static analysis tool."}], "id": "CVE-2026-89510", "lastModified": "2026-09-13T07:17:13.960", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:19:33.390", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/320e5258a53af0abc5abd9eb01519a48bab2dee8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/85f438382a865a4dc4c50e6b884310bb2b60fc4d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a7100601aa1a39f799a566acce10db20eaf4b7f2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fe9c591026c576d8b1f72aab5e4cd67350530763"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: RDMA/cxgb4 use-after-free vulnerability", "id": "2532033", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532033"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's RDMA/cxgb4 component. This vulnerability occurs when the `c4iw_remove()` function frees a device while its registration work (`reg_work`) is still pending or actively running. This timing issue can lead to the `c4iw_register_device()` function attempting to access memory that has already been deallocated. The primary consequence of this use-after-free vulnerability is system instability, which could potentially lead to a denial of service."], "name": "CVE-2026-89510", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-11T19:43:55Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89510\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89510\nhttps://git.kernel.org/stable/c/320e5258a53af0abc5abd9eb01519a48bab2dee8\nhttps://git.kernel.org/stable/c/85f438382a865a4dc4c50e6b884310bb2b60fc4d\nhttps://git.kernel.org/stable/c/a7100601aa1a39f799a566acce10db20eaf4b7f2\nhttps://git.kernel.org/stable/c/fe9c591026c576d8b1f72aab5e4cd67350530763"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5,fe9c591026c576d8b1f72aab5e4cd67350530763)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[85f438382a865a4dc4c50e6b884310bb2b60fc4d,320e5258a53af0abc5abd9eb01519a48bab2dee8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5,a7100601aa1a39f799a566acce10db20eaf4b7f2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1c8f1da5d851b92aeb81dbbb9ebd516f6e2588f5,fe9c591026c576d8b1f72aab5e4cd67350530763)"}}], "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": "4.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"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": "generic", "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": "2026-09-12T03:45:07.950282+00:00", "updated": "2026-09-13T04:30:08.563820+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}