{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74345", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.886Z", "datePublished": "2026-08-15T05:58:33.906Z", "dateUpdated": "2026-08-17T05:46:10.583Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:46:10.583Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Fix endpoint/socket association handling\n\nDisassociating a socket from an endpoint via siw_socket_disassoc() may\nrelease the last reference on that endpoint and free it. Therefore, don't\nclear the endpoints socket pointer after calling that function, but\nwithin.\n\nThis fixes a:\n\n BUG: KASAN: slab-use-after-free in siw_cm_work_handler (drivers/infiniband/sw/siw/siw_cm.c:1053 drivers/infiniband/sw/siw/siw_cm.c:1075)\n\nwhich occurred after processing a malformed MPA request during connection\nestablishment, causing the new endpoint to be closed."}], "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 bug is hit while processing attacker-supplied MPA/TCP data on an inbound SIW listener socket during connection establishment, which is a standard network protocol path analogous to other in-kernel TCP service handlers.\nAC:L - An attacker fully controls the TCP connection and malformed MPA request bytes that deterministically fail parsing and drive the endpoint teardown path where the refcount bug frees the cep before it is accessed again.\nPR:N - Exploitation requires only the ability to open a TCP connection to a host running an SIW RDMA listener; the MPA handshake is unauthenticated and occurs before any RDMA credentials or local privileges are established.\nUI:N - No end-user action is required at exploit time; the kernel processes the malicious inbound connection automatically once an administrator has started an RDMA listener service.\nS:U - Impact is confined to kernel memory corruption and potential host privilege escalation within the same kernel security authority, not a VM escape or cross-authority boundary such as guest-to-hypervisor.\nC:H - The vulnerability is a slab use-after-free on a freed siw_cep object; UAF on attacker-influenced connection teardown enables heap grooming and arbitrary kernel memory read primitives beyond a simple crash.\nI:H - Use-after-free of the connection endpoint structure in kernel heap can be leveraged for controlled writes and code execution via object reuse and function pointer/callback corruption, not merely data integrity of a single field.\nA:H - The bug was reproduced as a KASAN slab-use-after-free in siw_cm_work_handler during malformed MPA processing, which can cause kernel oops/panic and denial of service on the target host."}]}], "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_cm.c"], "versions": [{"version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7", "lessThan": "b28d513393f81e2de00f82970487a9d001557e4e", "status": "affected", "versionType": "git"}, {"version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7", "lessThan": "f6183983ce1ff254d629a333739082b39d7c5eb6", "status": "affected", "versionType": "git"}, {"version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7", "lessThan": "b6cf763eee0a932792bef64ceaca568d324192fc", "status": "affected", "versionType": "git"}, {"version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7", "lessThan": "ea4f6f6c53577fb3f05dbd78b15e586772d49831", "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_cm.c"], "versions": [{"version": "5.3", "status": "affected"}, {"version": "0", "lessThan": "5.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b28d513393f81e2de00f82970487a9d001557e4e"}, {"url": "https://git.kernel.org/stable/c/f6183983ce1ff254d629a333739082b39d7c5eb6"}, {"url": "https://git.kernel.org/stable/c/b6cf763eee0a932792bef64ceaca568d324192fc"}, {"url": "https://git.kernel.org/stable/c/ea4f6f6c53577fb3f05dbd78b15e586772d49831"}], "title": "RDMA/siw: Fix endpoint/socket association handling", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/sw/siw/siw_cm.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b28d513393f81e2de00f82970487a9d001557e4e", "status": "affected", "version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7", "versionType": "git"}, {"lessThan": "f6183983ce1ff254d629a333739082b39d7c5eb6", "status": "affected", "version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7", "versionType": "git"}, {"lessThan": "b6cf763eee0a932792bef64ceaca568d324192fc", "status": "affected", "version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7", "versionType": "git"}, {"lessThan": "ea4f6f6c53577fb3f05dbd78b15e586772d49831", "status": "affected", "version": "6c52fdc244b5ccc468006fd65a504d4ee33743c7", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/sw/siw/siw_cm.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.3"}, {"lessThan": "5.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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/siw: Fix endpoint/socket association handling\n\nDisassociating a socket from an endpoint via siw_socket_disassoc() may\nrelease the last reference on that endpoint and free it. Therefore, don't\nclear the endpoints socket pointer after calling that function, but\nwithin.\n\nThis fixes a:\n\n BUG: KASAN: slab-use-after-free in siw_cm_work_handler (drivers/infiniband/sw/siw/siw_cm.c:1053 drivers/infiniband/sw/siw/siw_cm.c:1075)\n\nwhich occurred after processing a malformed MPA request during connection\nestablishment, causing the new endpoint to be closed."}], "id": "CVE-2026-74345", "lastModified": "2026-08-17T06:19:29.070", "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": "2026-08-15T06:22:35.607", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b28d513393f81e2de00f82970487a9d001557e4e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b6cf763eee0a932792bef64ceaca568d324192fc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ea4f6f6c53577fb3f05dbd78b15e586772d49831"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f6183983ce1ff254d629a333739082b39d7c5eb6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: RDMA/siw: Fix endpoint/socket association handling", "id": "2516840", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516840"}, "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-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nRDMA/siw: Fix endpoint/socket association handling\nDisassociating a socket from an endpoint via siw_socket_disassoc() may\nrelease the last reference on that endpoint and free it. Therefore, don't\nclear the endpoints socket pointer after calling that function, but\nwithin.\nThis fixes a:\nBUG: KASAN: slab-use-after-free in siw_cm_work_handler (drivers/infiniband/sw/siw/siw_cm.c:1053 drivers/infiniband/sw/siw/siw_cm.c:1075)\nwhich occurred after processing a malformed MPA request during connection\nestablishment, causing the new endpoint to be closed.", "A flaw was found in the Linux kernel's Soft iWARP (siw) component, which handles high-performance data transfer. This vulnerability occurs when the system processes a specially crafted connection request, leading to a 'use-after-free' error. An attacker could exploit this to cause a denial of service (DoS), making the affected system unresponsive."], "name": "CVE-2026-74345", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not 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"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74345\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74345\nhttps://lore.kernel.org/linux-cve-announce/2026081558-CVE-2026-74345-c375@gregkh/T"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6c52fdc244b5ccc468006fd65a504d4ee33743c7,b28d513393f81e2de00f82970487a9d001557e4e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6c52fdc244b5ccc468006fd65a504d4ee33743c7,f6183983ce1ff254d629a333739082b39d7c5eb6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6c52fdc244b5ccc468006fd65a504d4ee33743c7,b6cf763eee0a932792bef64ceaca568d324192fc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6c52fdc244b5ccc468006fd65a504d4ee33743c7,ea4f6f6c53577fb3f05dbd78b15e586772d49831)"}}], "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": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"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": "2026-08-15T16:30:03.973600+00:00", "updated": "2026-08-22T03:00:12.253491+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}