RDMA/mlx5: Fix UMR XLT cleanup on ODP populate failure
Published Aug 15, 2026
7.5
HIGHCVSS 3.1
EPSS 0.73%
Description
mlx5r_umr_update_xlt() allocates and DMA maps an XLT buffer with mlx5r_umr_create_xlt(). The buffer is released by the common cleanup path through mlx5r_umr_unmap_free_xlt().
After mlx5_odp_populate_xlt() became fallible, its error path returned directly and skipped that cleanup. This leaks the XLT DMA mapping and buffer. If the emergency XLT page was used, it also leaves xlt_emergency_page_mutex locked.
Break out of the loop so execution falls through the existing cleanup path.
Affected products
-
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
-
- Version 6.16StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<6.16
- Version 6.18.40StatusunaffectedConstraints<=6.18.*
- Version 7.1.5StatusunaffectedConstraints<=7.1.*
- Version 7.2StatusunaffectedConstraints<=*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
No data.
No data.
Red Hat Enterprise Linux 10
kernel
Fix deferred
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel
Fix deferred
Red Hat Enterprise Linux 9
kernel-rt
Fix deferred
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Fix deferred | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Fix deferred | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Fix deferred | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.73% (0.00732) | 52.74th | v5 (v2026.06.15) |
| Aug 15, 2026 | 0.18% (0.00179) | 7.69th | v5 (v2026.06.15) |
References (8)
- https://access.redhat.com/security/cve/CVE-2026-74396 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2516786 Issue Tracking
- https://git.kernel.org/stable/c/1eae35b37923cb71b0cb5136d00671440d488b9f
- https://git.kernel.org/stable/c/9619909d4869afe720904c6888a289b9ac3055b8
- https://git.kernel.org/stable/c/ffa85a2c197935ace6f1634ad9eb0a44bc615670
- https://lore.kernel.org/linux-cve-announce/2026081508-CVE-2026-74396-7c5a@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2026-74396
- https://www.cve.org/CVERecord?id=CVE-2026-74396
Change history (0)
No recorded changes yet.