CVE-2026-74377RDMA/rxe: Copy WQE to local buffer in non-SRQ receive path
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Copy WQE to local buffer in non-SRQ receive path For non-SRQ QPs, the responder reads WQE fields directly from the shared queue buffer mapped into userspace. This allows a malicious user to modify fields like num_sge or sge entries while the kernel is processing the WQE, leading to out-of-bounds reads in rxe_resp_check_length() and copy_data(). Introduce get_recv_wqe() that validates num_sge and copies the WQE to a kernel-local buffer before processing, matching the approach already used for SRQ WQEs in get_srq_wqe(). The srq_wqe buffer is reused since SRQ and non-SRQ paths are mutually exclusive per QP.
Timeline
ID reserved
By Linux
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 8700e3e7c4857d28ebaa824509934556da0b3e76 – < 2e60378fb3c8b51c94103bb40014c4fe38fa5033
- affected 8700e3e7c4857d28ebaa824509934556da0b3e76 – < fc72fd61cc8b2e2e3e92ae4c0e9cc30c9a7ecb78
- affected 8700e3e7c4857d28ebaa824509934556da0b3e76 – < 9fa785137303f7109c23dea779b8dedc67c9b531
- affected 8700e3e7c4857d28ebaa824509934556da0b3e76 – < 5420eebf3b3c162bfaf965f30e61cd1d689e5732
- affected 8700e3e7c4857d28ebaa824509934556da0b3e76 – < a211b7904aed365e4e4f08a48ec6e6dd1ea7b16b
- affected 8700e3e7c4857d28ebaa824509934556da0b3e76 – < d6ab440240a04b8737ee4c7bb21af9182e451733
- affected 4.8
- unaffected < 4.8
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References6
- https://git.kernel.org/stable/c/2e60378fb3c8b51c94103bb40014c4fe38fa5033 (opens in a new tab)
- https://git.kernel.org/stable/c/fc72fd61cc8b2e2e3e92ae4c0e9cc30c9a7ecb78 (opens in a new tab)
- https://git.kernel.org/stable/c/9fa785137303f7109c23dea779b8dedc67c9b531 (opens in a new tab)
- https://git.kernel.org/stable/c/5420eebf3b3c162bfaf965f30e61cd1d689e5732 (opens in a new tab)
- https://git.kernel.org/stable/c/a211b7904aed365e4e4f08a48ec6e6dd1ea7b16b (opens in a new tab)
- https://git.kernel.org/stable/c/d6ab440240a04b8737ee4c7bb21af9182e451733 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-59524 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-74377)Record last updated .