CVE-2026-89505

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89505", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.716Z", "datePublished": "2026-09-11T19:43:52.690Z", "dateUpdated": "2026-10-19T08:47:56.727Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:47:56.727Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/uverbs: Guard legacy bundles without method_elm\n\nThe legacy write() path dispatches through a uverbs_api_write_method, but\nthe uverbs_attr_bundle passed to provider code does not have an ioctl\nmethod element. If malformed provider input causes the common uverbs\nvalidation code to emit an error message, uverbs_get_handler_fn()\ndereferences the uninitialized method_elm pointer.\n\nInitialize method_elm explicitly for legacy bundles and make\nuverbs_get_handler_fn() return NULL when no ioctl method is present. The\nlegacy dispatcher continues to use its local write method, while the ioctl\npath continues to use the registered ioctl handler."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/core/ib_core_uverbs.c", "drivers/infiniband/core/uverbs_main.c"], "versions": [{"version": "7122ff96068a03595bde2fbafaca82ca2ed8084e", "lessThan": "edae84e5461749ed9adf9fcf5c6e075381040ac3", "status": "affected", "versionType": "git"}, {"version": "7122ff96068a03595bde2fbafaca82ca2ed8084e", "lessThan": "60a42d510113f46de47e86a84bf5758597644487", "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/core/ib_core_uverbs.c", "drivers/infiniband/core/uverbs_main.c"], "versions": [{"version": "7.1", "status": "affected"}, {"version": "0", "lessThan": "7.1", "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": "7.1", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/edae84e5461749ed9adf9fcf5c6e075381040ac3"}, {"url": "https://git.kernel.org/stable/c/60a42d510113f46de47e86a84bf5758597644487"}], "title": "RDMA/uverbs: Guard legacy bundles without method_elm", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/core/ib_core_uverbs.c", "drivers/infiniband/core/uverbs_main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "edae84e5461749ed9adf9fcf5c6e075381040ac3", "status": "affected", "version": "7122ff96068a03595bde2fbafaca82ca2ed8084e", "versionType": "git"}, {"lessThan": "60a42d510113f46de47e86a84bf5758597644487", "status": "affected", "version": "7122ff96068a03595bde2fbafaca82ca2ed8084e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/core/ib_core_uverbs.c", "drivers/infiniband/core/uverbs_main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.1"}, {"lessThan": "7.1", "status": "unaffected", "version": "0", "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/uverbs: Guard legacy bundles without method_elm\n\nThe legacy write() path dispatches through a uverbs_api_write_method, but\nthe uverbs_attr_bundle passed to provider code does not have an ioctl\nmethod element. If malformed provider input causes the common uverbs\nvalidation code to emit an error message, uverbs_get_handler_fn()\ndereferences the uninitialized method_elm pointer.\n\nInitialize method_elm explicitly for legacy bundles and make\nuverbs_get_handler_fn() return NULL when no ioctl method is present. The\nlegacy dispatcher continues to use its local write method, while the ioctl\npath continues to use the registered ioctl handler."}], "id": "CVE-2026-89505", "lastModified": "2026-10-19T09:17:44.760", "metrics": {}, "published": "2026-09-11T20:19:32.807", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/60a42d510113f46de47e86a84bf5758597644487"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/edae84e5461749ed9adf9fcf5c6e075381040ac3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: RDMA/uverbs uninitialized pointer dereference leading to denial of service", "id": "2532252", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532252"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-824", "details": ["A flaw was found in the Linux kernel's RDMA/uverbs component. Malformed input from a provider in the legacy write path can cause the `uverbs_get_handler_fn()` function to dereference an uninitialized pointer. This can lead to a system crash, resulting in a denial of service."], "name": "CVE-2026-89505", "public_date": "2026-09-11T19:43:52Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89505\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89505\nhttps://git.kernel.org/stable/c/60a42d510113f46de47e86a84bf5758597644487\nhttps://git.kernel.org/stable/c/edae84e5461749ed9adf9fcf5c6e075381040ac3"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7122ff96068a03595bde2fbafaca82ca2ed8084e,edae84e5461749ed9adf9fcf5c6e075381040ac3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7122ff96068a03595bde2fbafaca82ca2ed8084e,60a42d510113f46de47e86a84bf5758597644487)"}}], "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": "generic", "value": "7.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,7.1)"}}, {"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": "2026-09-12T08:15:06.673675+00:00", "updated": "2026-09-15T22:30:15.274221+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}