{"api_version":"1","generated_at":"2026-08-22T16:59:50+00:00","cve":"CVE-2026-74584","urls":{"html":"https://cve.report/CVE-2026-74584","api":"https://cve.report/api/cve/CVE-2026-74584.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74584","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74584"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 15:16:21","updated_at":"2026-08-22 15:16:21"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/c19b360fa10c521c0b681875cdaa51545d45a491","name":"https://git.kernel.org/stable/c/c19b360fa10c521c0b681875cdaa51545d45a491","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c75f8ce4baa29ae57fe615c6a2c5101f59b8b89a","name":"https://git.kernel.org/stable/c/c75f8ce4baa29ae57fe615c6a2c5101f59b8b89a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9896bdfd21d918e9f26a52bc6109cc77970ee0b1","name":"https://git.kernel.org/stable/c/9896bdfd21d918e9f26a52bc6109cc77970ee0b1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a3ed2daab02b2a706e882ad31b5c3c4f33cb5bb1","name":"https://git.kernel.org/stable/c/a3ed2daab02b2a706e882ad31b5c3c4f33cb5bb1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/53c97e9882f4e747b4ac31b211317c2eba541af9","name":"https://git.kernel.org/stable/c/53c97e9882f4e747b4ac31b211317c2eba541af9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9128c2411b83a64c0a69d2ff059c741bde25a9cc","name":"https://git.kernel.org/stable/c/9128c2411b83a64c0a69d2ff059c741bde25a9cc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e2b143df29003d2704b51f62e9297006953dbacb","name":"https://git.kernel.org/stable/c/e2b143df29003d2704b51f62e9297006953dbacb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f6b079629becfa977f9c51fe53ad2e6dcc55ef44","name":"https://git.kernel.org/stable/c/f6b079629becfa977f9c51fe53ad2e6dcc55ef44","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74584","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74584","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1ac5a404797523cedaf424a3aaa3cf8f9548dff8 53c97e9882f4e747b4ac31b211317c2eba541af9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1ac5a404797523cedaf424a3aaa3cf8f9548dff8 9896bdfd21d918e9f26a52bc6109cc77970ee0b1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1ac5a404797523cedaf424a3aaa3cf8f9548dff8 9128c2411b83a64c0a69d2ff059c741bde25a9cc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1ac5a404797523cedaf424a3aaa3cf8f9548dff8 c19b360fa10c521c0b681875cdaa51545d45a491 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.211 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.177 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.144 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.95 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.37 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.14 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/infiniband/hw/bnxt_re/ib_verbs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"53c97e9882f4e747b4ac31b211317c2eba541af9","status":"affected","version":"1ac5a404797523cedaf424a3aaa3cf8f9548dff8","versionType":"git"},{"lessThan":"9896bdfd21d918e9f26a52bc6109cc77970ee0b1","status":"affected","version":"1ac5a404797523cedaf424a3aaa3cf8f9548dff8","versionType":"git"},{"lessThan":"9128c2411b83a64c0a69d2ff059c741bde25a9cc","status":"affected","version":"1ac5a404797523cedaf424a3aaa3cf8f9548dff8","versionType":"git"},{"lessThan":"c19b360fa10c521c0b681875cdaa51545d45a491","status":"affected","version":"1ac5a404797523cedaf424a3aaa3cf8f9548dff8","versionType":"git"},{"lessThan":"a3ed2daab02b2a706e882ad31b5c3c4f33cb5bb1","status":"affected","version":"1ac5a404797523cedaf424a3aaa3cf8f9548dff8","versionType":"git"},{"lessThan":"e2b143df29003d2704b51f62e9297006953dbacb","status":"affected","version":"1ac5a404797523cedaf424a3aaa3cf8f9548dff8","versionType":"git"},{"lessThan":"c75f8ce4baa29ae57fe615c6a2c5101f59b8b89a","status":"affected","version":"1ac5a404797523cedaf424a3aaa3cf8f9548dff8","versionType":"git"},{"lessThan":"f6b079629becfa977f9c51fe53ad2e6dcc55ef44","status":"affected","version":"1ac5a404797523cedaf424a3aaa3cf8f9548dff8","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/infiniband/hw/bnxt_re/ib_verbs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.11"},{"lessThan":"4.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.260","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.211","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.177","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.144","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.95","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.37","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.14","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.260","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.211","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.177","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.144","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.95","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.37","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.14","versionStartIncluding":"4.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"4.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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()."}],"providerMetadata":{"dateUpdated":"2026-08-22T14:28:07.988Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/53c97e9882f4e747b4ac31b211317c2eba541af9"},{"url":"https://git.kernel.org/stable/c/9896bdfd21d918e9f26a52bc6109cc77970ee0b1"},{"url":"https://git.kernel.org/stable/c/9128c2411b83a64c0a69d2ff059c741bde25a9cc"},{"url":"https://git.kernel.org/stable/c/c19b360fa10c521c0b681875cdaa51545d45a491"},{"url":"https://git.kernel.org/stable/c/a3ed2daab02b2a706e882ad31b5c3c4f33cb5bb1"},{"url":"https://git.kernel.org/stable/c/e2b143df29003d2704b51f62e9297006953dbacb"},{"url":"https://git.kernel.org/stable/c/c75f8ce4baa29ae57fe615c6a2c5101f59b8b89a"},{"url":"https://git.kernel.org/stable/c/f6b079629becfa977f9c51fe53ad2e6dcc55ef44"}],"title":"RDMA/bnxt_re: zero shared page before exposing to userspace","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74584","datePublished":"2026-08-22T14:28:07.988Z","dateReserved":"2026-08-15T05:44:03.918Z","dateUpdated":"2026-08-22T14:28:07.988Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 15:16:21","lastModifiedDate":"2026-08-22 15:16:21","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74584","Ordinal":"1","Title":"RDMA/bnxt_re: zero shared page before exposing to userspace","CVE":"CVE-2026-74584","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74584","Ordinal":"1","NoteData":"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().","Type":"Description","Title":"RDMA/bnxt_re: zero shared page before exposing to userspace"}]}}}