{"id":"CVE-2026-89528","title":"svcrdma: Reject Read lists that exceed the page budget","summary":"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 mult…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-476"],"vendor":"Linux","product":"Linux","affected":["Linux >= 026d958b38c628a1b4ced534808945365e2747a5 < beb4e9801f6362436102acc4cc5304b7324f9365","Linux >= 026d958b38c628a1b4ced534808945365e2747a5 < e70fdb121171c3eb0ac34eb545721828cd737717","Linux >= 026d958b38c628a1b4ced534808945365e2747a5 < 1a3af2262cb384112ef38632de4690682be528b4","Linux >= 026d958b38c628a1b4ced534808945365e2747a5 < 465f511f59a0fa7a80d5d1073c4b24f28ea38f58","Linux >= 026d958b38c628a1b4ced534808945365e2747a5 < 0ca487abb3bdf581851664b5db21f364caf57682","Linux 4.13"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T19:23:02.453234Z"},"published":"2026-09-11","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:47:41.509Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89528","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"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89528.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89528"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532188"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89528"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89528"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89528.mbox"}],"tags":["cve.org","csaf","vex","red-hat"],"epss":0.00651,"epssPercentile":0.50978,"scores":{"cna":7.5,"vendor":7},"ingestedAt":"2026-09-14T15:23:07.475Z","slug":"CVE-2026-89528","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 026d958b38c628a1b4ced534808945365e2747a5 < beb4e9801f6362436102acc4cc5304b7324f9365`\n- `Linux >= 026d958b38c628a1b4ced534808945365e2747a5 < e70fdb121171c3eb0ac34eb545721828cd737717`\n- `Linux >= 026d958b38c628a1b4ced534808945365e2747a5 < 1a3af2262cb384112ef38632de4690682be528b4`\n- `Linux >= 026d958b38c628a1b4ced534808945365e2747a5 < 465f511f59a0fa7a80d5d1073c4b24f28ea38f58`\n- `Linux >= 026d958b38c628a1b4ced534808945365e2747a5 < 0ca487abb3bdf581851664b5db21f364caf57682`\n- `Linux 4.13`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89528.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":223298,"id":"CVE-2026-89528","ts":1792180049498,"field":"cvss","old":"7","new":"7.5"},{"seq":206928,"id":"CVE-2026-89528","ts":1789749703484,"field":"cvss","old":"5.9","new":"7"},{"seq":206927,"id":"CVE-2026-89528","ts":1789749703484,"field":"severity","old":"medium","new":"high"},{"seq":203025,"id":"CVE-2026-89528","ts":1789403733395,"field":"cvss","old":"7.5","new":"5.9"},{"seq":203024,"id":"CVE-2026-89528","ts":1789403733395,"field":"severity","old":"high","new":"medium"},{"seq":197969,"id":"CVE-2026-89528","ts":1789384321194,"field":"cvss","old":"5.9","new":"7.5"},{"seq":197968,"id":"CVE-2026-89528","ts":1789384321194,"field":"severity","old":"medium","new":"high"},{"seq":183805,"id":"CVE-2026-89528","ts":1789356677467,"field":"cvss","old":"7.5","new":"5.9"},{"seq":183804,"id":"CVE-2026-89528","ts":1789356677467,"field":"severity","old":"high","new":"medium"},{"seq":153320,"id":"CVE-2026-89528","ts":1789285350031,"field":"cvss","old":null,"new":"7.5"},{"seq":153319,"id":"CVE-2026-89528","ts":1789285350031,"field":"severity","old":"none","new":"high"},{"seq":147624,"id":"CVE-2026-89528","ts":1789270211640,"field":"cvss","old":null,"new":"5.9"},{"seq":147623,"id":"CVE-2026-89528","ts":1789270211640,"field":"severity","old":"none","new":"medium"},{"seq":109378,"id":"CVE-2026-89528","ts":1789183731675,"field":"cvss","old":null,"new":"5.9"},{"seq":109377,"id":"CVE-2026-89528","ts":1789183731675,"field":"severity","old":"none","new":"medium"}]}