CVE-2026-74378
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
RDMA/rxe: Fix TOCTOU heap overflow in get_srq_wqe
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 8700e3e7c4857d28ebaa824509934556da0b3e76 | affected | git | c8db0e5ab0b6c540214c46c56aaac7cbcb0967fe | Unavailable | None listed |
| 8700e3e7c4857d28ebaa824509934556da0b3e76 | affected | git | e48daa94ad2d406225b73491fc935064716f0ec7 | Unavailable | None listed |
| 8700e3e7c4857d28ebaa824509934556da0b3e76 | affected | git | 3cfa2a3adc51b7c57729961a03446962ff10e3d2 | Unavailable | None listed |
| 8700e3e7c4857d28ebaa824509934556da0b3e76 | affected | git | cd19a6345e3727adafafa5954b58b13c92e13b80 | Unavailable | None listed |
| 8700e3e7c4857d28ebaa824509934556da0b3e76 | affected | git | 3e07ea9579dc9553d2285c26c2823931358aa3b8 | Unavailable | None listed |
| 8700e3e7c4857d28ebaa824509934556da0b3e76 | affected | git | 02558c86b6b761063e9399e6b939984500327ef1 | Unavailable | None listed |
| 8700e3e7c4857d28ebaa824509934556da0b3e76 | affected | git | b9800d7953d119bcc068c74587d48e4ba0313629 | Unavailable | None listed |
| 8700e3e7c4857d28ebaa824509934556da0b3e76 | affected | git | 22b8fbded65b8c441b634a185f8da67657df6c50 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.8 | Unavailable | None listed |
| 5.10.270 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.221 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.178 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.145 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.97 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.40 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.5 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |