{"id":"CVE-2026-74584","revision":"e8a876d58dc74af9b4eeb68bc5e680f0","records":[{"revision":"e8a876d58dc74af9b4eeb68bc5e680f0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74584","aliases":[],"title":"RDMA/bnxt_re: zero shared page before exposing to userspace","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/bnxt_re: zero shared page before exposing to userspace\n\nbnxt_re_alloc_ucontext() allocates uctx->shpg via\n__get_free_page(GFP_KERNEL). The buddy allocator does not zero pages\nwithout __GFP_ZERO, so the page contains stale kernel data from\nwhatever object most recently freed it.\n\nThe page is then mapped into userspace via vm_insert_page() under\nBNXT_RE_MMAP_SH_PAGE in bnxt_re_mmap(). The driver only ever writes\n4 bytes (a u32 AVID) at offset BNXT_RE_AVID_OFFT (0x10) inside\nbnxt_re_create_ah(); the remaining 4092 bytes of the page are exposed\nto userspace unsanitised, leaking kernel memory contents.\n\nAny user with access to /dev/infiniband/uverbsX on a host with a\nbnxt_re device (typically rdma group membership) can read this data\nvia a single mmap() at pgoff 0 after IB_USER_VERBS_CMD_GET_CONTEXT.\n\nOther shared pages in the same file already use get_zeroed_page()\ncorrectly:\n\n  drivers/infiniband/hw/bnxt_re/ib_verbs.c\n      srq->uctx_srq_page = (void *)get_zeroed_page(GFP_KERNEL);\n      cq->uctx_cq_page  = (void *)get_zeroed_page(GFP_KERNEL);\n\nuctx->shpg is the only outlier. Bring it in line with the existing\nconvention by switching to get_zeroed_page().","state":0,"publishedAt":"2026-08-22T14:28:07.988+00:00","modifiedAt":"2026-10-16T19:05:58.544+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/infiniband/hw/bnxt_re/ib_verbs.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"1ac5a404797523cedaf424a3aaa3cf8f9548dff8\",\n                            \"lessThan\": \"53c97e9882f4e747b4ac31b211317c2eba541af9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1ac5a404797523cedaf424a3aaa3cf8f9548dff8\",\n                            \"lessThan\": \"9896bdfd21d918e9f26a52bc6109cc77970ee0b1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1ac5a404797523cedaf424a3aaa3cf8f9548dff8\",\n                            \"lessThan\": \"9128c2411b83a64c0a69d2ff059c741bde25a9cc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1ac5a404797523cedaf424a3aaa3cf8f9548dff8\",\n                            \"lessThan\": \"c19b360fa10c521c0b681875cdaa51545d45a491\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1ac5a404797523cedaf424a3aaa3cf8f9548dff8\",\n                            \"lessThan\": \"a3ed2daab02b2a706e882ad31b5c3c4f33cb5bb1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1ac5a404797523cedaf424a3aaa3cf8f9548dff8\",\n                            \"lessThan\": \"e2b143df29003d2704b51f62e9297006953dbacb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1ac5a404797523cedaf424a3aaa3cf8f9548dff8\",\n                            \"lessThan\": \"c75f8ce4baa29ae57fe615c6a2c5101f59b8b89a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1ac5a404797523cedaf424a3aaa3cf8f9548dff8\",\n                            \"lessThan\": \"f6b079629becfa977f9c51fe53ad2e6dcc55ef44\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/infiniband/hw/bnxt_re/ib_verbs.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.11\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.11\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.260\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.211\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.177\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.144\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.95\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.37\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.14\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/53c97e9882f4e747b4ac31b211317c2eba541af9","https://git.kernel.org/stable/c/9896bdfd21d918e9f26a52bc6109cc77970ee0b1","https://git.kernel.org/stable/c/9128c2411b83a64c0a69d2ff059c741bde25a9cc","https://git.kernel.org/stable/c/c19b360fa10c521c0b681875cdaa51545d45a491","https://git.kernel.org/stable/c/a3ed2daab02b2a706e882ad31b5c3c4f33cb5bb1","https://git.kernel.org/stable/c/e2b143df29003d2704b51f62e9297006953dbacb","https://git.kernel.org/stable/c/c75f8ce4baa29ae57fe615c6a2c5101f59b8b89a","https://git.kernel.org/stable/c/f6b079629becfa977f9c51fe53ad2e6dcc55ef44"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74584","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74584","identifiers":["CVE-2026-74584"]},"retained":false,"historicalAffected":[]}],"coverage":[]}