CVE-2026-74334
- Source
- https://cve.org/CVERecord?id=CVE-2026-74334
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74334.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-74334
- Downstream
- Published
- 2026-08-15T05:58:26Z
- Modified
- 2026-08-18T03:56:46Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- RDMA/nldev: Fix locking when accessing mr->pd
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
RDMA/nldev: Fix locking when accessing mr->pd
Sashiko points out that, due to rereg_mr, the PD is actually variable and all the touches in nldev are racy.
Use mr->device instead of mr->pd->device.
Getting the PD restrack ID is more tricky. To avoid disturbing all the happy paths, add an rdma_restrack_sync() operation which is sort of like flush_workqueue() or synchronize_irq(): after it returns, all the old nldev touches to the mr are gone and everything sees the new PD. This makes it safe to reach into the PD pointer.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74334.json" }- References
-
- https://git.kernel.org/stable/c/1a132ee4e655288d9a0937ea5109a0d038431ae9
- https://git.kernel.org/stable/c/50d5c02ab8e62325548bd3a6e6b758a9dcd6e7c3
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74334.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-74334
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git