{"api_version":"1","generated_at":"2026-10-22T10:32:34+00:00","cve":"CVE-2026-98365","urls":{"html":"https://cve.report/CVE-2026-98365","api":"https://cve.report/api/cve/CVE-2026-98365.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98365","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98365"},"summary":{"title":"RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-06 09:18:30","updated_at":"2026-10-19 10:18:39"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"9.8","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"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","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"9.8","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":9.8,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/5d9426a74fc8cb8f375fcdc19b465a030f9b8cab","name":"https://git.kernel.org/stable/c/5d9426a74fc8cb8f375fcdc19b465a030f9b8cab","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d10e2a08799e858d3e71ea4169bcd018f216d444","name":"https://git.kernel.org/stable/c/d10e2a08799e858d3e71ea4169bcd018f216d444","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3431f525718f6b07da308cda6d44f8cb548bbd37","name":"https://git.kernel.org/stable/c/3431f525718f6b07da308cda6d44f8cb548bbd37","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b7d2118660545a00b21e83010ded1a231c6fb8c5","name":"https://git.kernel.org/stable/c/b7d2118660545a00b21e83010ded1a231c6fb8c5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2f3b705144e3a3c14184fec6e354680081fe91ec","name":"https://git.kernel.org/stable/c/2f3b705144e3a3c14184fec6e354680081fe91ec","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98365","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98365","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8700e3e7c4857d28ebaa824509934556da0b3e76 b7d2118660545a00b21e83010ded1a231c6fb8c5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8700e3e7c4857d28ebaa824509934556da0b3e76 5d9426a74fc8cb8f375fcdc19b465a030f9b8cab git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8700e3e7c4857d28ebaa824509934556da0b3e76 2f3b705144e3a3c14184fec6e354680081fe91ec git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8700e3e7c4857d28ebaa824509934556da0b3e76 3431f525718f6b07da308cda6d44f8cb548bbd37 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8700e3e7c4857d28ebaa824509934556da0b3e76 d10e2a08799e858d3e71ea4169bcd018f216d444 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.54 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.8 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"98365","cve":"CVE-2026-98365","epss":"0.001650000","percentile":"0.051260000","score_date":"2026-10-06","updated_at":"2026-10-07 00:14:55"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"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"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.54","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.8","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"4.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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":{"baseScore":9.8,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"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."}]}],"providerMetadata":{"dateUpdated":"2026-10-19T09:18:17.324Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98365","datePublished":"2026-10-06T08:46:50.834Z","dateReserved":"2026-09-25T10:25:14.344Z","dateUpdated":"2026-10-19T09:18:17.324Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-06 09:18:30","lastModifiedDate":"2026-10-19 10:18:39","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"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","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98365","Ordinal":"1","Title":"RDMA/rxe: Fix integer overflow in mr_check_range() leading to OO","CVE":"CVE-2026-98365","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98365","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"RDMA/rxe: Fix integer overflow in mr_check_range() leading to OO"}]}}}