CVE-2026-89509

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89509", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.716Z", "datePublished": "2026-09-11T19:43:55.336Z", "dateUpdated": "2026-10-19T08:48:00.667Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:48:00.667Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/ionic: Embed counter driver data in rdma_counter allocation\n\nCommit 7e53b31acc7f (\"RDMA/core: Create and destroy rdma_counter using\nrdma_zalloc_drv_obj()\") requires drivers implementing counter ops to\nembed struct rdma_counter in a driver-specific struct, register its size\nvia INIT_RDMA_OBJ_SIZE, and provide a counter_init callback.\n\nThe ionic driver was merged without this adaptation, causing a NULL\npointer dereference in alloc_and_bind() since rdma_zalloc_drv_obj()\nallocates zero bytes when size_rdma_counter is unset.\n\nConsolidate struct ionic_counter into a new struct ionic_rdma_counter\nthat embeds struct rdma_counter, replace the xarray with a lightweight\nida for ID allocation, and add the required counter_init and\nINIT_RDMA_OBJ_SIZE declarations."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/hw/ionic/ionic_hw_stats.c", "drivers/infiniband/hw/ionic/ionic_ibdev.h"], "versions": [{"version": "ea4c399642b85dc30f44d90ee805c6a18fa03062", "lessThan": "c98197ee3cd28288da13dc9881bb9e74daa7cbbc", "status": "affected", "versionType": "git"}, {"version": "ea4c399642b85dc30f44d90ee805c6a18fa03062", "lessThan": "08b8630b557828aedb1d9ef0a6e2ec421f334ee2", "status": "affected", "versionType": "git"}, {"version": "ea4c399642b85dc30f44d90ee805c6a18fa03062", "lessThan": "cf3ebd89e754015625fee90aa938f6bc79a2c974", "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/ionic/ionic_hw_stats.c", "drivers/infiniband/hw/ionic/ionic_ibdev.h"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "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": "6.18", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c98197ee3cd28288da13dc9881bb9e74daa7cbbc"}, {"url": "https://git.kernel.org/stable/c/08b8630b557828aedb1d9ef0a6e2ec421f334ee2"}, {"url": "https://git.kernel.org/stable/c/cf3ebd89e754015625fee90aa938f6bc79a2c974"}], "title": "RDMA/ionic: Embed counter driver data in rdma_counter allocation", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/ionic/ionic_hw_stats.c", "drivers/infiniband/hw/ionic/ionic_ibdev.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c98197ee3cd28288da13dc9881bb9e74daa7cbbc", "status": "affected", "version": "ea4c399642b85dc30f44d90ee805c6a18fa03062", "versionType": "git"}, {"lessThan": "08b8630b557828aedb1d9ef0a6e2ec421f334ee2", "status": "affected", "version": "ea4c399642b85dc30f44d90ee805c6a18fa03062", "versionType": "git"}, {"lessThan": "cf3ebd89e754015625fee90aa938f6bc79a2c974", "status": "affected", "version": "ea4c399642b85dc30f44d90ee805c6a18fa03062", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/ionic/ionic_hw_stats.c", "drivers/infiniband/hw/ionic/ionic_ibdev.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.18"}, {"lessThan": "6.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "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\nRDMA/ionic: Embed counter driver data in rdma_counter allocation\n\nCommit 7e53b31acc7f (\"RDMA/core: Create and destroy rdma_counter using\nrdma_zalloc_drv_obj()\") requires drivers implementing counter ops to\nembed struct rdma_counter in a driver-specific struct, register its size\nvia INIT_RDMA_OBJ_SIZE, and provide a counter_init callback.\n\nThe ionic driver was merged without this adaptation, causing a NULL\npointer dereference in alloc_and_bind() since rdma_zalloc_drv_obj()\nallocates zero bytes when size_rdma_counter is unset.\n\nConsolidate struct ionic_counter into a new struct ionic_rdma_counter\nthat embeds struct rdma_counter, replace the xarray with a lightweight\nida for ID allocation, and add the required counter_init and\nINIT_RDMA_OBJ_SIZE declarations."}], "id": "CVE-2026-89509", "lastModified": "2026-10-19T09:17:45.203", "metrics": {}, "published": "2026-09-11T20:19:33.273", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/08b8630b557828aedb1d9ef0a6e2ec421f334ee2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c98197ee3cd28288da13dc9881bb9e74daa7cbbc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cf3ebd89e754015625fee90aa938f6bc79a2c974"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel RDMA/ionic: NULL pointer dereference leading to Denial of Service", "id": "2532215", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532215"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel's RDMA/ionic driver. This vulnerability arises from the driver's incorrect handling of `rdma_counter` allocations, specifically by not embedding counter driver data as required. This oversight can lead to a NULL pointer dereference when the `alloc_and_bind()` function is called. A local attacker could potentially trigger this flaw, causing the system to crash and resulting in a Denial of Service (DoS)."], "name": "CVE-2026-89509", "public_date": "2026-09-11T19:43:55Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89509\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89509\nhttps://git.kernel.org/stable/c/08b8630b557828aedb1d9ef0a6e2ec421f334ee2\nhttps://git.kernel.org/stable/c/c98197ee3cd28288da13dc9881bb9e74daa7cbbc\nhttps://git.kernel.org/stable/c/cf3ebd89e754015625fee90aa938f6bc79a2c974"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ea4c399642b85dc30f44d90ee805c6a18fa03062,c98197ee3cd28288da13dc9881bb9e74daa7cbbc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ea4c399642b85dc30f44d90ee805c6a18fa03062,08b8630b557828aedb1d9ef0a6e2ec421f334ee2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ea4c399642b85dc30f44d90ee805c6a18fa03062,cf3ebd89e754015625fee90aa938f6bc79a2c974)"}}], "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": "6.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.51,6.19.0)"}}, {"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": "2026-09-12T03:45:07.950582+00:00", "updated": "2026-09-15T22:30:15.269914+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}