dmaengine: idxd: Fix possible invalid memory access after FLR
Published Apr 22, 2026
7.8
HIGHCVSS 3.1
EPSS 0.17%
Description
In the case that the first Function Level Reset (FLR) concludes correctly, but in the second FLR the scratch area for the saved configuration cannot be allocated, it's possible for a invalid memory access to happen.
Always set the deallocated scratch area to NULL after FLR completes.
Affected products
-
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
-
- Version 6.14StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<6.14
- Version 6.18.21StatusunaffectedConstraints<=6.18.*
- Version 6.19.11StatusunaffectedConstraints<=6.19.*
- Version 7.0StatusunaffectedConstraints<=*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
- ≥ 6.14 · < 6.18.21
- ≥ 6.19 · < 6.19.11
- 7.0
- 7.0
- 7.0
- 7.0
- 7.0
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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 1, 2026.
Score over time
Apr–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.17% (0.00173) | 6.06th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.13% (0.00127) | 2.69th | v5 (v2026.06.15) |
| Apr 23, 2026 | 0.02% (0.00017) | 4.05th | v4 (v2025.03.14) |
References (8)
- https://access.redhat.com/security/cve/CVE-2026-31442 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2460680 Issue Tracking
- https://git.kernel.org/stable/c/504c0e6751001ac46917c73e703f2b1b92cfc026 Patch
- https://git.kernel.org/stable/c/867d0c801f21370d561420fa32f2ea1a7dc3a22d Patch
- https://git.kernel.org/stable/c/d6077df7b75d26e4edf98983836c05d00ebabd8d Patch
- https://lore.kernel.org/linux-cve-announce/2026042244-CVE-2026-31442-dece@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2026-31442
- https://www.cve.org/CVERecord?id=CVE-2026-31442
Change history (0)
No recorded changes yet.