{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64268", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.775Z", "datePublished": "2026-07-25T08:49:16.336Z", "dateUpdated": "2026-07-25T08:49:16.336Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T08:49:16.336Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: bound Read Response placement to the RREAD length\n\nIn drivers/infiniband/sw/siw/siw_qp_rx.c, siw_proc_rresp() places each\ninbound Read Response DDP segment at sge->laddr + wqe->processed and then\naccumulates wqe->processed, but it never checks the running total against\nthe sink buffer length on continuation segments. siw_check_sge() resolves\nand validates the sink memory only on the first fragment (the if (!*mem)\nbranch), and siw_rresp_check_ntoh() compares the cumulative length against\nwqe->bytes only on the final segment (the !frx->more_ddp_segs guard).\n\nA connected siw peer that answers an outstanding RREAD with Read Response\nsegments that keep the DDP Last flag clear, carrying more total payload\nthan the RREAD requested, drives wqe->processed past the validated sink\nbuffer; the next siw_rx_data() call writes out of bounds at\nsge->laddr + wqe->processed. siw runs iWARP over ordinary routable TCP,\nso the peer is the remote end of an established RDMA connection and needs\nno local privilege.\n\nBound every segment before placement, exactly as siw_proc_send() and\nsiw_proc_write() already do for their tagged and untagged paths, and\nterminate the connection with a base-or-bounds DDP error when the\nRead Response would overrun the sink buffer.\n\nThis is the second receive-path length fix for this file. A separate\nchange rejects an MPA FPDU length that underflows the per-fragment\nremainder in the header decode; that guard does not cover this case,\nbecause here each individual segment length is self-consistent and only\nthe accumulated placement offset overruns the buffer."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/sw/siw/siw_qp_rx.c"], "versions": [{"version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "a31b6d18ded3cc32d9ee85a6ff0726d4274887b2", "status": "affected", "versionType": "git"}, {"version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "595e6537ad1a210da32cbb9a7f91aa73090915ba", "status": "affected", "versionType": "git"}, {"version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "3ef7e052cbd05a8b13a51a07b185a39ec93ee1cf", "status": "affected", "versionType": "git"}, {"version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "b2e26c955f8dd7e8d3f16c858db05245ea4fa817", "status": "affected", "versionType": "git"}, {"version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "6bc89f34a4597f9f6d41f7a60c67a3153bfe8851", "status": "affected", "versionType": "git"}, {"version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "423a78ff7928c2601013f73ec6d896f5597d0df5", "status": "affected", "versionType": "git"}, {"version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "75c93cd3c421890f49ea93f0b978b9b7bb10e5e3", "status": "affected", "versionType": "git"}, {"version": "8b6a361b8c482f22ac99c3273285ff16b23fba91", "lessThan": "7d29f7e9dbd844cae4d3e559cf78324b9642fd6b", "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/siw/siw_qp_rx.c"], "versions": [{"version": "5.3", "status": "affected"}, {"version": "0", "lessThan": "5.3", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc1", "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": "5.3", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "7.2-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a31b6d18ded3cc32d9ee85a6ff0726d4274887b2"}, {"url": "https://git.kernel.org/stable/c/595e6537ad1a210da32cbb9a7f91aa73090915ba"}, {"url": "https://git.kernel.org/stable/c/3ef7e052cbd05a8b13a51a07b185a39ec93ee1cf"}, {"url": "https://git.kernel.org/stable/c/b2e26c955f8dd7e8d3f16c858db05245ea4fa817"}, {"url": "https://git.kernel.org/stable/c/6bc89f34a4597f9f6d41f7a60c67a3153bfe8851"}, {"url": "https://git.kernel.org/stable/c/423a78ff7928c2601013f73ec6d896f5597d0df5"}, {"url": "https://git.kernel.org/stable/c/75c93cd3c421890f49ea93f0b978b9b7bb10e5e3"}, {"url": "https://git.kernel.org/stable/c/7d29f7e9dbd844cae4d3e559cf78324b9642fd6b"}], "title": "RDMA/siw: bound Read Response placement to the RREAD length", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b6a361b8c482f22ac99c3273285ff16b23fba91,a31b6d18ded3cc32d9ee85a6ff0726d4274887b2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b6a361b8c482f22ac99c3273285ff16b23fba91,595e6537ad1a210da32cbb9a7f91aa73090915ba)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b6a361b8c482f22ac99c3273285ff16b23fba91,3ef7e052cbd05a8b13a51a07b185a39ec93ee1cf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b6a361b8c482f22ac99c3273285ff16b23fba91,b2e26c955f8dd7e8d3f16c858db05245ea4fa817)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b6a361b8c482f22ac99c3273285ff16b23fba91,6bc89f34a4597f9f6d41f7a60c67a3153bfe8851)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b6a361b8c482f22ac99c3273285ff16b23fba91,423a78ff7928c2601013f73ec6d896f5597d0df5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b6a361b8c482f22ac99c3273285ff16b23fba91,75c93cd3c421890f49ea93f0b978b9b7bb10e5e3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b6a361b8c482f22ac99c3273285ff16b23fba91,7d29f7e9dbd844cae4d3e559cf78324b9642fd6b)"}}], "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": "5.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.96,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-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": "2026-07-25T10:45:03.539977+00:00", "updated": "2026-07-25T10:45:03.540044+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}