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…
Info
Summary
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 …
In-depth triage
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Sources
- NVD DATABASE
Original Links
- https://git.kernel.org/stable/c/53c97e9882f4e747b4ac31b211317c2eba541af9
- https://git.kernel.org/stable/c/9128c2411b83a64c0a69d2ff059c741bde25a9cc
- https://git.kernel.org/stable/c/9896bdfd21d918e9f26a52bc6109cc77970ee0b1
- https://git.kernel.org/stable/c/a3ed2daab02b2a706e882ad31b5c3c4f33cb5bb1
- https://git.kernel.org/stable/c/c19b360fa10c521c0b681875cdaa51545d45a491
- https://git.kernel.org/stable/c/c75f8ce4baa29ae57fe615c6a2c5101f59b8b89a
- https://git.kernel.org/stable/c/e2b143df29003d2704b51f62e9297006953dbacb
- https://git.kernel.org/stable/c/f6b079629becfa977f9c51fe53ad2e6dcc55ef44
Timeline
- nvd_ingest NVD