CVE-2026-98365

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98365", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.344Z", "datePublished": "2026-10-06T08:46:50.834Z", "dateUpdated": "2026-10-19T09:18:17.324Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:18:17.324Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access\n\nmr_check_range() validates that [iova, iova+length) falls within the\nregistered MR range using wraparound-prone arithmetic:\n\n if (iova < mr->ibmr.iova ||\n iova + length > mr->ibmr.iova + mr->ibmr.length)\n\nA remote peer can craft an RDMA-Write/Read RETH so that iova + length\nwraps to 0 (e.g. iova=0xfffffffffffffff8, length=8), bypassing the\ncheck. rxe_mr_iova_to_index() then computes a huge index (int idx, only\nguarded by WARN_ON) and rxe_mr_copy_xarray() dereferences\nmr->page_info[huge], causing an out-of-bounds read/write and a kernel\noops that is triggerable by an unauthenticated remote peer.\n\nRewrite the check in overflow-safe form; the first two clauses guarantee\nthat the subsequent subtractions do not underflow:\n\n if (iova < mr->ibmr.iova ||\n length > mr->ibmr.length ||\n iova - mr->ibmr.iova > mr->ibmr.length - length)\n\nWith the fix, mr_check_range() returns -EINVAL for the crafted iova and\nthe responder reports REMOTE_ACCESS_ERROR instead of triggering the OOB."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The bad iova and length come from the RETH header of a RoCEv2 RDMA WRITE/READ (UDP/IP, routable). qp_resp_from_reth() copies them into qp->resp, and check_rkey() hands them to mr_check_range(), where iova+length wraps past 2^64 and the bounds check passes.\nAC:L - The attacker is the connected RC peer, so it controls the QPN, PSN and RETH contents and chooses va near 2^64 to make iova+length wrap for any MR. The bug fires on the first packet, with no race or memory layout to win.\nPR:N - RoCE has no authentication. check_addr() only matches the peer's IP address, and services such as rtrs-srv send MR rkeys with IB_ACCESS_REMOTE_WRITE to any client that connects, without checking credentials.\nUI:N - No victim action is needed. The responder processes the attacker's RETH request entirely in kernel receive context once the QP is connected.\nS:U - The out-of-bounds access corrupts or discloses kernel memory on the same host, inside the kernel's own security authority. No VM or IOMMU boundary is crossed.\nC:H - For RDMA READ, rxe_mr_copy_xarray() memcpy()s from a struct page pointer read out of bounds of mr->page_info[], and that data is sent back to the remote peer. Choosing va moves the index over a window of about 2^20 entries.\nI:H - For RDMA WRITE, rxe_mr_copy_xarray() memcpy()s the peer's payload into the page pointed to by the out-of-bounds page_info[idx].page entry. That is a remote write into kernel-chosen memory, which can be used to hijack control flow.\nA:H - An out-of-bounds page_info index, past the WARN_ON in rxe_mr_iova_to_index(), dereferences garbage page pointers and oopses the kernel. A remote peer can repeat this at will."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/sw/rxe/rxe_mr.c"], "versions": [{"version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "lessThan": "b7d2118660545a00b21e83010ded1a231c6fb8c5", "status": "affected", "versionType": "git"}, {"version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "lessThan": "5d9426a74fc8cb8f375fcdc19b465a030f9b8cab", "status": "affected", "versionType": "git"}, {"version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "lessThan": "2f3b705144e3a3c14184fec6e354680081fe91ec", "status": "affected", "versionType": "git"}, {"version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "lessThan": "3431f525718f6b07da308cda6d44f8cb548bbd37", "status": "affected", "versionType": "git"}, {"version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "lessThan": "d10e2a08799e858d3e71ea4169bcd018f216d444", "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/sw/rxe/rxe_mr.c"], "versions": [{"version": "4.8", "status": "affected"}, {"version": "0", "lessThan": "4.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.54", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.8", "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": "4.8", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.18.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.2.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b7d2118660545a00b21e83010ded1a231c6fb8c5"}, {"url": "https://git.kernel.org/stable/c/5d9426a74fc8cb8f375fcdc19b465a030f9b8cab"}, {"url": "https://git.kernel.org/stable/c/2f3b705144e3a3c14184fec6e354680081fe91ec"}, {"url": "https://git.kernel.org/stable/c/3431f525718f6b07da308cda6d44f8cb548bbd37"}, {"url": "https://git.kernel.org/stable/c/d10e2a08799e858d3e71ea4169bcd018f216d444"}], "title": "RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/sw/rxe/rxe_mr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b7d2118660545a00b21e83010ded1a231c6fb8c5", "status": "affected", "version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "versionType": "git"}, {"lessThan": "5d9426a74fc8cb8f375fcdc19b465a030f9b8cab", "status": "affected", "version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "versionType": "git"}, {"lessThan": "2f3b705144e3a3c14184fec6e354680081fe91ec", "status": "affected", "version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "versionType": "git"}, {"lessThan": "3431f525718f6b07da308cda6d44f8cb548bbd37", "status": "affected", "version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "versionType": "git"}, {"lessThan": "d10e2a08799e858d3e71ea4169bcd018f216d444", "status": "affected", "version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/sw/rxe/rxe_mr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.8"}, {"lessThan": "4.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.54", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.8", "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/rxe: Fix integer overflow in mr_check_range() leading to OOB access\n\nmr_check_range() validates that [iova, iova+length) falls within the\nregistered MR range using wraparound-prone arithmetic:\n\n if (iova < mr->ibmr.iova ||\n iova + length > mr->ibmr.iova + mr->ibmr.length)\n\nA remote peer can craft an RDMA-Write/Read RETH so that iova + length\nwraps to 0 (e.g. iova=0xfffffffffffffff8, length=8), bypassing the\ncheck. rxe_mr_iova_to_index() then computes a huge index (int idx, only\nguarded by WARN_ON) and rxe_mr_copy_xarray() dereferences\nmr->page_info[huge], causing an out-of-bounds read/write and a kernel\noops that is triggerable by an unauthenticated remote peer.\n\nRewrite the check in overflow-safe form; the first two clauses guarantee\nthat the subsequent subtractions do not underflow:\n\n if (iova < mr->ibmr.iova ||\n length > mr->ibmr.length ||\n iova - mr->ibmr.iova > mr->ibmr.length - length)\n\nWith the fix, mr_check_range() returns -EINVAL for the crafted iova and\nthe responder reports REMOTE_ACCESS_ERROR instead of triggering the OOB."}], "id": "CVE-2026-98365", "lastModified": "2026-10-19T10:18:39.407", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-10-06T09:18:30.677", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2f3b705144e3a3c14184fec6e354680081fe91ec"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3431f525718f6b07da308cda6d44f8cb548bbd37"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5d9426a74fc8cb8f375fcdc19b465a030f9b8cab"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b7d2118660545a00b21e83010ded1a231c6fb8c5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d10e2a08799e858d3e71ea4169bcd018f216d444"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access", "id": "2546413", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2546413"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nRDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access\nmr_check_range() validates that [iova, iova+length) falls within the\nregistered MR range using wraparound-prone arithmetic:\nif (iova < mr->ibmr.iova ||\niova + length > mr->ibmr.iova + mr->ibmr.length)\nA remote peer can craft an RDMA-Write/Read RETH so that iova + length\nwraps to 0 (e.g. iova=0xfffffffffffffff8, length=8), bypassing the\ncheck. rxe_mr_iova_to_index() then computes a huge index (int idx, only\nguarded by WARN_ON) and rxe_mr_copy_xarray() dereferences\nmr->page_info[huge], causing an out-of-bounds read/write and a kernel\noops that is triggerable by an unauthenticated remote peer.\nRewrite the check in overflow-safe form; the first two clauses guarantee\nthat the subsequent subtractions do not underflow:\nif (iova < mr->ibmr.iova ||\nlength > mr->ibmr.length ||\niova - mr->ibmr.iova > mr->ibmr.length - length)\nWith the fix, mr_check_range() returns -EINVAL for the crafted iova and\nthe responder reports REMOTE_ACCESS_ERROR instead of triggering the OOB.", "A flaw was found in the Linux kernel's Remote Direct Memory Access (RDMA) software driver. An unauthenticated remote attacker can cause a Denial of Service (DoS) or out-of-bounds memory access by sending specially crafted network requests that trigger an integer overflow during memory range validation. This flaw allows invalid requests to bypass boundary checks, resulting in a system crash."], "name": "CVE-2026-98365", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"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": "2026-10-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98365\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98365\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98365.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8700e3e7c4857d28ebaa824509934556da0b3e76,b7d2118660545a00b21e83010ded1a231c6fb8c5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8700e3e7c4857d28ebaa824509934556da0b3e76,5d9426a74fc8cb8f375fcdc19b465a030f9b8cab)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8700e3e7c4857d28ebaa824509934556da0b3e76,2f3b705144e3a3c14184fec6e354680081fe91ec)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8700e3e7c4857d28ebaa824509934556da0b3e76,3431f525718f6b07da308cda6d44f8cb548bbd37)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8700e3e7c4857d28ebaa824509934556da0b3e76,d10e2a08799e858d3e71ea4169bcd018f216d444)"}}], "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": "4.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.158,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.54,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.8,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc4,*]"}}], "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": "2026-10-06T14:00:20.948442+00:00", "updated": "2026-10-09T04:30:17.798669+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}