RDMA/mlx5: Release the HW‑provided UAR index rather than the SW one
Priority LOW 35Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 5 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Release the HW‑provided UAR index rather than the SW one Free the UAR index returned by the hardware.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00176 7th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.178, 6.6.145, 6.12.97 +3Red Hat: 5 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-74296
- 2026-10-03 Alias added: GHSA-vvjm-q4pr-4r6c
- 2026-10-16 CISA SSVC decision points changed
References
Other 6
- https://git.kernel.org/stable/c/80f1f49f53a42733e60c90e0ec545e647969214d
- https://git.kernel.org/stable/c/aabfc845838ef453f1d22d7665596f9cc48be7dd
- https://git.kernel.org/stable/c/6f83de384ca582fa87b4c2b0d03bd1ed3bf9a2ee
- https://git.kernel.org/stable/c/d3ff718c0c7153e2641e6a09507bace14fc5c402
- https://git.kernel.org/stable/c/ef369446f62903ea079e8a7954b5bf8bb8300fe3
- https://git.kernel.org/stable/c/449ae7927152e46acbe5f19f97eafdae6d3a96b1
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Sources
- CVE-2026-74296 · CVE Program
- CVE-2026-74296 · NVD
- FIRST EPSS
- GHSA-vvjm-q4pr-4r6c · GitHub Advisory Database · CC BY 4.0
- CVE-2026-74296 · Red Hat security data · CC BY 4.0
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