Answer in brief
CVE-2026-74584 records a Unknown severity vulnerability in RDMA/bnxt_re: zero shared page before exposing to userspace. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1ac5a404797523cedaf424a3aaa3cf8f9548dff8 <53c97e9882f4e747b4ac31b211317c2eba541af9 || >=1ac5a404797523cedaf424a3aaa3cf8f9548dff8 <9896bdfd21d918e9f26a52bc6109cc77970ee0b1 || >=1ac5a404797523cedaf424a3aaa3cf8f9548dff8 <9128c2411b83a64c0a69d2ff059c741bde25a9cc || >=1ac5a404797523cedaf424a3aaa3cf8f9548dff8 <c19b360fa10c521c0b681875cdaa51545d45a491 || >=1ac5a404797523cedaf424a3aaa3cf8f9548dff8 <a3ed2daab02b2a706e882ad31b5c3c4f33cb5bb1 || >=1ac5a404797523cedaf424a3aaa3cf8f9548dff8 <e2b143df29003d2704b51f62e9297006953dbacb || >=1ac5a404797523cedaf424a3aaa3cf8f9548dff8 <c75f8ce4baa29ae57fe615c6a2c5101f59b8b89a || >=1ac5a404797523cedaf424a3aaa3cf8f9548dff8 <f6b079629becfa977f9c51fe53ad2e6dcc55ef44 | 53c97e9882f4e747b4ac31b211317c2eba541af9, 9896bdfd21d918e9f26a52bc6109cc77970ee0b1, 9128c2411b83a64c0a69d2ff059c741bde25a9cc, c19b360fa10c521c0b681875cdaa51545d45a491, a3ed2daab02b2a706e882ad31b5c3c4f33cb5bb1, e2b143df29003d2704b51f62e9297006953dbacb, c75f8ce4baa29ae57fe615c6a2c5101f59b8b89a, f6b079629becfa977f9c51fe53ad2e6dcc55ef44 |
| Linux/Linuxgeneric | 4.11 | Not reported |
Published upstream
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 22, 2026
In the Linux kernel, the following vulnerability has been resolved: RDMA/bnxt_re: zero shared page before exposing to userspace bnxt_re_alloc_ucontext() allocates uctx->shpg via __get_free_page(GFP_KERNEL). The buddy allocator does not zero pages without __GFP_ZERO, so the page contains stale kernel data from whatever object most recently freed it. The page is then mapped into userspace via vm_insert_page() under BNXT_RE_MMAP_SH_PAGE in bnxt_re_mmap(). The driver only ever writes 4 bytes (a u32 AVID) at offset BNXT_RE_AVID_OFFT (0x10) inside bnxt_re_create_ah(); the remaining 4092 bytes of the page are exposed to userspace unsanitised, leaking kernel memory contents. Any user with access to /dev/infiniband/uverbsX on a host with a bnxt_re device (typically rdma group membership) can read this data via a single mmap() at pgoff 0 after IB_USER_VERBS_CMD_GET_CONTEXT. Other shared pages in the same file already use get_zeroed_page() correctly: drivers/infiniband/hw/bnxt_re/ib_verbs.c srq->uctx_srq_page = (void *)get_zeroed_page(GFP_KERNEL); cq->uctx_cq_page = (void *)get_zeroed_page(GFP_KERNEL); uctx->shpg is the only outlier. Bring it in line with the existing convention by switching to get_zeroed_page().
Quoted source text, attributed separately from HOL analysis.