{"id":"CVE-2026-89528","summary":"svcrdma: Reject Read lists that exceed the page budget","details":"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.","modified":"2026-09-13T03:47:19.224274671Z","published":"2026-09-11T19:44:08.514Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89528.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0ca487abb3bdf581851664b5db21f364caf57682"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1a3af2262cb384112ef38632de4690682be528b4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/465f511f59a0fa7a80d5d1073c4b24f28ea38f58"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89528.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89528"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"026d958b38c628a1b4ced534808945365e2747a5"},{"fixed":"1a3af2262cb384112ef38632de4690682be528b4"},{"fixed":"465f511f59a0fa7a80d5d1073c4b24f28ea38f58"},{"fixed":"0ca487abb3bdf581851664b5db21f364caf57682"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89528.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.13.0"},{"fixed":"6.18.51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89528.json"}}],"schema_version":"1.9.0"}