{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93154", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T16:02:15.089Z", "datePublished": "2026-09-17T16:11:50.107Z", "dateUpdated": "2026-10-19T09:06:26.358Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:06:26.358Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/irdma: Add refcounting to user ring MRs\n\nPrevent userspace from deregistering the MRs that back QP/CQ/SRQ rings\nby bumping the MR's refcount upon association."}], "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 trigger is a local IB_USER_VERBS_CMD_DEREG_MR write (ib_uverbs_dereg_mr / UVERBS_METHOD_MR_DESTROY) on /dev/infiniband/uverbs*. After irdma_get_pbl binds an IRDMA_MEMREG_TYPE_QP/CQ/SRQ ring MR to a live QP/CQ/SRQ, irdma_dereg_mr still frees it; no iWARP/RoCE message supplies that deregistration.\nAC:L - The attacker drives every step with no race: irdma_reg_user_mr with reg_type QP/CQ/SRQ, then irdma_setup_umode_qp/irdma_create_cq/irdma_setup_umode_srq so irdma_get_pbl sets on_list=false, then irdma_dereg_mr. Pre-fix irdma_del_memlist is a no-op on an already-associated ring, so the free is deterministic.\nPR:L - ib_uverbs_open() only checks rdma_dev_access_netns() (devices shared across netns by default) and ib_uverbs_dereg_mr() only requires ownership of the caller's MR uobject, with no capability gate. rdma-core udev rules expose uverbs as 0666; a small ring fits unprivileged RLIMIT_MEMLOCK without CAP_IPC_LOCK.\nUI:N - The attacker registers the ring MR via ib_uverbs_reg_mr, creates the QP/CQ/SRQ, and issues IB_USER_VERBS_CMD_DEREG_MR on that handle from their own process; no other user must mount a device, open a file, or otherwise act.\nS:U - irdma_dereg_mr kfree()s the irdma_mr and releases its umem/HMC PBLEs while the same host's QP/CQ/SRQ still holds iwpbl and the NIC still DMAs those rings. That is host-kernel memory corruption, not a KVM/Xen guest-to-host escape or an IOMMU isolation bypass.\nC:H - irdma_dereg_mr calls ib_umem_release, irdma_free_pble, and kfree(iwmr) while hardware still walks those HMC PBLEs and DMA-reads SQ/RQ/CQ rings. Recycled umem pages and PBLE tables yield device DMA reads of kernel or other-process memory, and iwqp/iwcq->iwpbl dangles into the freed irdma_mr.\nI:H - The NIC keeps DMAing CQEs/WQEs into unpinned, reallocatable ring pages and walking freed PBLE page tables, producing device writes into recycled kernel memory. Combined with the irdma_mr heap UAF (struct irdma_pbl iwpbl is embedded in iwmr), this is an arbitrary-write primitive.\nA:H - kfree of a still-referenced irdma_mr, irdma_free_pble of live HMC page tables, and DMA into unmapped SQ/RQ/CQ pages cause a kernel oops/panic or an irdma CQP/device reset when the QP/CQ/SRQ is next used or destroyed."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/hw/irdma/utils.c", "drivers/infiniband/hw/irdma/verbs.c"], "versions": [{"version": "b48c24c2d710cf34810c555dcef883a3d35a9c08", "lessThan": "07974c267f603a76aead348bca97deee95efdcc9", "status": "affected", "versionType": "git"}, {"version": "b48c24c2d710cf34810c555dcef883a3d35a9c08", "lessThan": "a6c0e693a7c881bfa43ac74cbcad1f8e10f1382b", "status": "affected", "versionType": "git"}, {"version": "b48c24c2d710cf34810c555dcef883a3d35a9c08", "lessThan": "f67d8a08f60c9217df6d40da56422d2049f5e334", "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/irdma/utils.c", "drivers/infiniband/hw/irdma/verbs.c"], "versions": [{"version": "5.14", "status": "affected"}, {"version": "0", "lessThan": "5.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "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": "5.14", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/07974c267f603a76aead348bca97deee95efdcc9"}, {"url": "https://git.kernel.org/stable/c/a6c0e693a7c881bfa43ac74cbcad1f8e10f1382b"}, {"url": "https://git.kernel.org/stable/c/f67d8a08f60c9217df6d40da56422d2049f5e334"}], "title": "RDMA/irdma: Add refcounting to user ring MRs", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/irdma/utils.c", "drivers/infiniband/hw/irdma/verbs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "07974c267f603a76aead348bca97deee95efdcc9", "status": "affected", "version": "b48c24c2d710cf34810c555dcef883a3d35a9c08", "versionType": "git"}, {"lessThan": "a6c0e693a7c881bfa43ac74cbcad1f8e10f1382b", "status": "affected", "version": "b48c24c2d710cf34810c555dcef883a3d35a9c08", "versionType": "git"}, {"lessThan": "f67d8a08f60c9217df6d40da56422d2049f5e334", "status": "affected", "version": "b48c24c2d710cf34810c555dcef883a3d35a9c08", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/irdma/utils.c", "drivers/infiniband/hw/irdma/verbs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.14"}, {"lessThan": "5.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "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/irdma: Add refcounting to user ring MRs\n\nPrevent userspace from deregistering the MRs that back QP/CQ/SRQ rings\nby bumping the MR's refcount upon association."}], "id": "CVE-2026-93154", "lastModified": "2026-10-19T10:17:05.637", "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": "2026-09-17T17:18:10.710", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/07974c267f603a76aead348bca97deee95efdcc9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a6c0e693a7c881bfa43ac74cbcad1f8e10f1382b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f67d8a08f60c9217df6d40da56422d2049f5e334"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b48c24c2d710cf34810c555dcef883a3d35a9c08,07974c267f603a76aead348bca97deee95efdcc9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b48c24c2d710cf34810c555dcef883a3d35a9c08,a6c0e693a7c881bfa43ac74cbcad1f8e10f1382b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b48c24c2d710cf34810c555dcef883a3d35a9c08,f67d8a08f60c9217df6d40da56422d2049f5e334)"}}], "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": "5.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"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": "2026-09-19T09:15:14.413121+00:00", "updated": "2026-09-19T19:00:13.884702+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}