CVE-2022-50666

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Here, after a TCP connection drop by peer,\nthe triggered siw_cm_work_handler got delayed until after\nQP destroy call, referencing a QP which has already freed."}], "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 - Soft-iWARP processes peer TCP close in-kernel via siw_cm_llp_state_change \u2192 SIW_CM_WORK_PEER_CLOSE; a remote peer to an SIW listener (e.g. NFS/RDMA) triggers the UAF over the network, as in the NFSoRDMA xfstest report.\nAC:L - The attacker initiates the TCP drop that both queues the delayed CM work and drives local QP teardown; they control both sides of the race and can retry disconnects until the UAF hits.\nPR:N - QP association and teardown race on the SIW/IWARP accept and peer-close path (e.g. svc_rdma creates the QP at rdma_accept) before NFS or other application authentication, so no credentials on the target are required.\nUI:N - Exploitation needs only connecting to an already-listening SIW endpoint and dropping the TCP connection; no extra victim user action is required.\nS:U - Impact is kernel memory corruption and privilege escalation within the same host kernel authority, with no VM escape or other cross-boundary scope change.\nC:H - Use-after-free of the QP object allows heap reuse and attacker-controlled content in the freed structure, enabling arbitrary kernel memory disclosure.\nI:H - The same UAF provides a heap corruption primitive (kref ops and field writes in siw_qp_llp_close/siw_cm_work_handler on freed memory) usable for arbitrary write and control-flow hijacking.\nA:H - Accessing the freed QP in the CM work handler causes kernel oops/crash even without full exploitation, which is a full availability impact and can be repeated."}]}], "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.h", "drivers/infiniband/sw/siw/siw_qp.c", "drivers/infiniband/sw/siw/siw_verbs.c"], "versions": [{"version": "303ae1cdfdf7280ff4cfbbe65563b5ff15bb025b", "lessThan": "5c75d608fad58301b63e7d69200c13c3a1d411da", "status": "affected", "versionType": "git"}, {"version": "303ae1cdfdf7280ff4cfbbe65563b5ff15bb025b", "lessThan": "74ad141e995a730760b1bcfa14854b7f1057d6bc", "status": "affected", "versionType": "git"}, {"version": "303ae1cdfdf7280ff4cfbbe65563b5ff15bb025b", "lessThan": "0ed8bf9d0bb19f3f5eedd73f04aaf5bba9ac0737", "status": "affected", "versionType": "git"}, {"version": "303ae1cdfdf7280ff4cfbbe65563b5ff15bb025b", "lessThan": "a3c278807a459e6f50afee6971cabe74cccfb490", "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.h", "drivers/infiniband/sw/siw/siw_qp.c", "drivers/infiniband/sw/siw/siw_verbs.c"], "versions": [{"version": "5.3", "status": "affected"}, {"version": "0", "lessThan": "5.3", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.75", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.17", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.3", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1", "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": "5.15.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.19.17"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.0.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5c75d608fad58301b63e7d69200c13c3a1d411da"}, {"url": "https://git.kernel.org/stable/c/74ad141e995a730760b1bcfa14854b7f1057d6bc"}, {"url": "https://git.kernel.org/stable/c/0ed8bf9d0bb19f3f5eedd73f04aaf5bba9ac0737"}, {"url": "https://git.kernel.org/stable/c/a3c278807a459e6f50afee6971cabe74cccfb490"}], "title": "RDMA/siw: Fix QP destroy to wait for all references dropped.", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-50666", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:31:53.314545Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:41:22.420Z"}}]}}

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The calling RDMA core will free QP structure after\nsuccessful return from siw_qp_destroy() call, so siw must not\nhold any remaining reference to the QP upon return.\nA use-after-free was encountered in xfstest generic/460, while\ntesting NFSoRDMA. Here, after a TCP connection drop by peer,\nthe triggered siw_cm_work_handler got delayed until after\nQP destroy call, referencing a QP which has already freed."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.75", "versionStartIncluding": "5.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.19.17", "versionStartIncluding": "5.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.0.3", "versionStartIncluding": "5.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1", "versionStartIncluding": "5.3"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:59:18.159Z"}}}, "cveMetadata": {"cveId": "CVE-2022-50666", "state": "PUBLISHED", "dateUpdated": "2026-10-15T21:41:22.420Z", "dateReserved": "2025-12-09T01:26:45.990Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-12-09T01:29:16.813Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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{"bugzilla": {"description": "kernel: RDMA/siw: Fix QP destroy to wait for all references dropped", "id": "2420334", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2420334"}, "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"}, "details": ["No description is available for this CVE."], "name": "CVE-2022-50666", "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": "2025-12-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50666\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50666\nhttps://lore.kernel.org/linux-cve-announce/2025120944-CVE-2022-50666-0d75@gregkh/T"], "threat_severity": "Important"}

{}