CVE-2026-89529

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89529", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.719Z", "datePublished": "2026-09-11T19:44:09.259Z", "dateUpdated": "2026-10-19T08:48:20.953Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:48:20.953Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsvcrdma: Reject oversized Read segments at decode time\n\nThe RPC/RDMA Read list decoder stores wire-supplied segment\nlengths without validation. xdr_count_read_segments() checks\n4-byte alignment for non-zero position values but does not\ncap the segment length.\n\nAn oversized rs_length reaches svc_rdma_build_read_segment(),\nwhich derives nr_bvec from it and can drive a large dynamic\nbvec allocation before verifying that enough rq_pages remain.\nIf the post-allocation page-overrun guard fires, the freshly\nacquired rw context is not returned, leaking the resource.\n\nReject any segment whose length exceeds the receive context's\npage budget during Read list decoding, consistent with how\nxdr_check_write_chunk() bounds Write segment counts against\nrc_maxpages. Also return the rw context on the existing\npost-allocation overrun path in svc_rdma_build_read_segment(),\nkeeping that defensive guard balanced."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sunrpc/xprtrdma/svc_rdma_recvfrom.c", "net/sunrpc/xprtrdma/svc_rdma_rw.c"], "versions": [{"version": "5ee62b4a91137557ee4b09d1604f1dfd0b4344a8", "lessThan": "5120fe54e0e2f5b62797a432115cc61d61117a5b", "status": "affected", "versionType": "git"}, {"version": "5ee62b4a91137557ee4b09d1604f1dfd0b4344a8", "lessThan": "af6f0e06bed818ee7fc8b869915964410020a1c5", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sunrpc/xprtrdma/svc_rdma_recvfrom.c", "net/sunrpc/xprtrdma/svc_rdma_rw.c"], "versions": [{"version": "7.0", "status": "affected"}, {"version": "0", "lessThan": "7.0", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "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": "7.0", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5120fe54e0e2f5b62797a432115cc61d61117a5b"}, {"url": "https://git.kernel.org/stable/c/af6f0e06bed818ee7fc8b869915964410020a1c5"}], "title": "svcrdma: Reject oversized Read segments at decode time", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/sunrpc/xprtrdma/svc_rdma_recvfrom.c", "net/sunrpc/xprtrdma/svc_rdma_rw.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "5120fe54e0e2f5b62797a432115cc61d61117a5b", "status": "affected", "version": "5ee62b4a91137557ee4b09d1604f1dfd0b4344a8", "versionType": "git"}, {"lessThan": "af6f0e06bed818ee7fc8b869915964410020a1c5", "status": "affected", "version": "5ee62b4a91137557ee4b09d1604f1dfd0b4344a8", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/sunrpc/xprtrdma/svc_rdma_recvfrom.c", "net/sunrpc/xprtrdma/svc_rdma_rw.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.0"}, {"lessThan": "7.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "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\nsvcrdma: Reject oversized Read segments at decode time\n\nThe RPC/RDMA Read list decoder stores wire-supplied segment\nlengths without validation. xdr_count_read_segments() checks\n4-byte alignment for non-zero position values but does not\ncap the segment length.\n\nAn oversized rs_length reaches svc_rdma_build_read_segment(),\nwhich derives nr_bvec from it and can drive a large dynamic\nbvec allocation before verifying that enough rq_pages remain.\nIf the post-allocation page-overrun guard fires, the freshly\nacquired rw context is not returned, leaking the resource.\n\nReject any segment whose length exceeds the receive context's\npage budget during Read list decoding, consistent with how\nxdr_check_write_chunk() bounds Write segment counts against\nrc_maxpages. Also return the rw context on the existing\npost-allocation overrun path in svc_rdma_build_read_segment(),\nkeeping that defensive guard balanced."}], "id": "CVE-2026-89529", "lastModified": "2026-10-19T09:17:47.460", "metrics": {}, "published": "2026-09-11T20:19:35.740", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5120fe54e0e2f5b62797a432115cc61d61117a5b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/af6f0e06bed818ee7fc8b869915964410020a1c5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Resource leak in svcrdma due to oversized RPC/RDMA Read segments", "id": "2532020", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532020"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the Linux kernel's svcrdma component, which handles Remote Procedure Call over Remote Direct Memory Access (RPC/RDMA) Read operations. This vulnerability occurs because the Read list decoder does not properly validate the lengths of incoming data segments. An attacker could send an oversized Read segment, leading to excessive memory allocation and a subsequent resource leak. This resource exhaustion could potentially result in a Denial of Service (DoS) condition, making the system unavailable."], "name": "CVE-2026-89529", "package_state": [{"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-11T19:44:09Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89529\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89529\nhttps://git.kernel.org/stable/c/5120fe54e0e2f5b62797a432115cc61d61117a5b\nhttps://git.kernel.org/stable/c/af6f0e06bed818ee7fc8b869915964410020a1c5"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5ee62b4a91137557ee4b09d1604f1dfd0b4344a8,5120fe54e0e2f5b62797a432115cc61d61117a5b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5ee62b4a91137557ee4b09d1604f1dfd0b4344a8,af6f0e06bed818ee7fc8b869915964410020a1c5)"}}], "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": "7.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-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": "2026-09-12T03:30:08.482733+00:00", "updated": "2026-09-15T22:15:17.697005+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}