Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe get_srq_wqe() reads wqe->dma.num_sge from the shared receive queue buffer, which is mapped into userspace. It validates num_sge against max_sge, but then re-reads the same field to calculate the memcpy size. A concurrent userspace thread can modify num_sge between validation and use, causing a heap buffer overflow when copying the WQE into qp->resp.srq_wqe. Read num_sge into a local variable and use it for both the bounds check and the size calculation.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 8700e3e7c4857d28ebaa824509934556da0b3e76 before c8db0e5ab0b6c540214c46c56aaac7cbcb0967fe; affected 8700e3e7c4857d28ebaa824509934556da0b3e76 before e48daa94ad2d406225b73491fc935064716f0ec7; affected 8700e3e7c4857d28ebaa824509934556da0b3e76 before 3cfa2a3adc51b7c57729961a03446962ff10e3d2; affected 8700e3e7c4857d28ebaa824509934556da0b3e76 before cd19a6345e3727adafafa5954b58b13c92e13b80; affected 8700e3e7c4857d28ebaa824509934556da0b3e76 before 3e07ea9579dc9553d2285c26c2823931358aa3b8; affected 8700e3e7c4857d28ebaa824509934556da0b3e76 before 02558c86b6b761063e9399e6b939984500327ef1; affected 8700e3e7c4857d28ebaa824509934556da0b3e76 before b9800d7953d119bcc068c74587d48e4ba0313629; affected 8700e3e7c4857d28ebaa824509934556da0b3e76 before 22b8fbded65b8c441b634a185f8da67657df6c50 |
| Linux / Linux | affected 4.8; unaffected 0 before 4.8; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c8db0e5ab0b6c540214c46c56aaac7cbcb0967fe
- https://git.kernel.org/stable/c/e48daa94ad2d406225b73491fc935064716f0ec7
- https://git.kernel.org/stable/c/3cfa2a3adc51b7c57729961a03446962ff10e3d2
- https://git.kernel.org/stable/c/cd19a6345e3727adafafa5954b58b13c92e13b80
- https://git.kernel.org/stable/c/3e07ea9579dc9553d2285c26c2823931358aa3b8
- https://git.kernel.org/stable/c/02558c86b6b761063e9399e6b939984500327ef1
- https://git.kernel.org/stable/c/b9800d7953d119bcc068c74587d48e4ba0313629
- https://git.kernel.org/stable/c/22b8fbded65b8c441b634a185f8da67657df6c50
ADP enrichment
No English description supplied.
No references supplied.