{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89528", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.719Z", "datePublished": "2026-09-11T19:44:08.514Z", "dateUpdated": "2026-10-21T12:47:41.509Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:47:41.509Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsvcrdma: Reject Read lists that exceed the page budget\n\nIndividual Read segment lengths are validated at decode time, but\nnothing prevents a requester from sending multiple segments whose\ncumulative length exceeds the rq_pages array budget. 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no victim mount, click, or other user action is required.\nS:U - The NULL dereference oops stays in the host kernel that owns nfsd/svcrdma; this is not a VM, IOMMU, or sandbox escape.\nC:N - The fault is a NULL pointer dereference of the rq_pages[rq_maxpages] sentinel during DMA mapping; the access faults immediately and does not disclose kernel memory.\nI:N - The sentinel slot is a guaranteed NULL page pointer, not an out-of-bounds page used as a write destination; DMA mapping aborts on the NULL page without an arbitrary-write or control-flow hijack primitive.\nA:H - DMA mapping the NULL sentinel produces a kernel oops or panic that an unauthenticated NFS/RDMA peer can trigger repeatedly."}]}], "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"], "versions": [{"version": "026d958b38c628a1b4ced534808945365e2747a5", "lessThan": "beb4e9801f6362436102acc4cc5304b7324f9365", "status": "affected", "versionType": "git"}, {"version": "026d958b38c628a1b4ced534808945365e2747a5", "lessThan": "e70fdb121171c3eb0ac34eb545721828cd737717", "status": "affected", "versionType": "git"}, {"version": "026d958b38c628a1b4ced534808945365e2747a5", "lessThan": "1a3af2262cb384112ef38632de4690682be528b4", "status": "affected", "versionType": "git"}, {"version": "026d958b38c628a1b4ced534808945365e2747a5", "lessThan": "465f511f59a0fa7a80d5d1073c4b24f28ea38f58", "status": "affected", "versionType": "git"}, {"version": "026d958b38c628a1b4ced534808945365e2747a5", "lessThan": "0ca487abb3bdf581851664b5db21f364caf57682", "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"], "versions": [{"version": "4.13", "status": "affected"}, {"version": "0", "lessThan": "4.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "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": "4.13", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.13", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/beb4e9801f6362436102acc4cc5304b7324f9365"}, {"url": "https://git.kernel.org/stable/c/e70fdb121171c3eb0ac34eb545721828cd737717"}, {"url": "https://git.kernel.org/stable/c/1a3af2262cb384112ef38632de4690682be528b4"}, {"url": "https://git.kernel.org/stable/c/465f511f59a0fa7a80d5d1073c4b24f28ea38f58"}, {"url": "https://git.kernel.org/stable/c/0ca487abb3bdf581851664b5db21f364caf57682"}], "title": "svcrdma: Reject Read lists that exceed the page budget", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-89528", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T19:23:02.453234Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:26:41.042Z"}}]}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/sunrpc/xprtrdma/svc_rdma_recvfrom.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "beb4e9801f6362436102acc4cc5304b7324f9365", "status": "affected", "version": "026d958b38c628a1b4ced534808945365e2747a5", "versionType": "git"}, {"lessThan": "e70fdb121171c3eb0ac34eb545721828cd737717", "status": "affected", "version": "026d958b38c628a1b4ced534808945365e2747a5", "versionType": "git"}, {"lessThan": "1a3af2262cb384112ef38632de4690682be528b4", "status": "affected", "version": "026d958b38c628a1b4ced534808945365e2747a5", "versionType": "git"}, {"lessThan": "465f511f59a0fa7a80d5d1073c4b24f28ea38f58", "status": "affected", "version": "026d958b38c628a1b4ced534808945365e2747a5", "versionType": "git"}, {"lessThan": "0ca487abb3bdf581851664b5db21f364caf57682", "status": "affected", "version": "026d958b38c628a1b4ced534808945365e2747a5", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/sunrpc/xprtrdma/svc_rdma_recvfrom.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.13"}, {"lessThan": "4.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "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 Read lists that exceed the page budget\n\nIndividual Read segment lengths are validated at decode time, but\nnothing prevents a requester from sending multiple segments whose\ncumulative length exceeds the rq_pages array budget. When one\nsegment fills the page array exactly, the runtime guard in\nsvc_rdma_build_read_segment() is bypassed because len reaches zero.\nA subsequent segment then accesses the NULL sentinel slot at\nrq_pages[rq_maxpages], resulting in a NULL pointer dereference during\nDMA mapping.\n\nAccumulate pages across all Read segments and reject the message at\ndecode time when the total would overflow the page budget."}], "id": "CVE-2026-89528", "lastModified": "2026-10-21T13:20:07.017", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-89528", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T19:23:02.453234Z", "version": "2.0.3"}}]}, "published": "2026-09-11T20:19:35.613", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0ca487abb3bdf581851664b5db21f364caf57682"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1a3af2262cb384112ef38632de4690682be528b4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/465f511f59a0fa7a80d5d1073c4b24f28ea38f58"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/beb4e9801f6362436102acc4cc5304b7324f9365"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e70fdb121171c3eb0ac34eb545721828cd737717"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Denial of Service in svcrdma due to page budget overflow", "id": "2532188", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532188"}, "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-476", "details": ["A flaw was found in the Linux kernel's svcrdma component. A remote attacker could send specially crafted Read lists that exceed the page budget. This can lead to a NULL pointer dereference during Direct Memory Access (DMA) mapping, potentially causing a system crash and a denial of service."], "name": "CVE-2026-89528", "public_date": "2026-09-11T19:44:08Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89528\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89528\nhttps://git.kernel.org/stable/c/0ca487abb3bdf581851664b5db21f364caf57682\nhttps://git.kernel.org/stable/c/1a3af2262cb384112ef38632de4690682be528b4\nhttps://git.kernel.org/stable/c/465f511f59a0fa7a80d5d1073c4b24f28ea38f58"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[026d958b38c628a1b4ced534808945365e2747a5,1a3af2262cb384112ef38632de4690682be528b4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[026d958b38c628a1b4ced534808945365e2747a5,465f511f59a0fa7a80d5d1073c4b24f28ea38f58)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[026d958b38c628a1b4ced534808945365e2747a5,0ca487abb3bdf581851664b5db21f364caf57682)"}}], "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": "4.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.13)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.51,6.19.0)"}}, {"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": "2026-09-12T07:15:10.615496+00:00", "updated": "2026-09-15T22:15:17.701500+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}