CVE-2026-74378High· 7.8▾ TwilightIn 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 validat…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 14.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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.
Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < c8db0e5ab0b6c540214c46c56aaac7cbcb0967feLinux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < e48daa94ad2d406225b73491fc935064716f0ec7Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 3cfa2a3adc51b7c57729961a03446962ff10e3d2Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < cd19a6345e3727adafafa5954b58b13c92e13b80Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 3e07ea9579dc9553d2285c26c2823931358aa3b8Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 02558c86b6b761063e9399e6b939984500327ef1Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < b9800d7953d119bcc068c74587d48e4ba0313629Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 22b8fbded65b8c441b634a185f8da67657df6c50Linux 4.8Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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