CVE-2026-31441: dmaengine: idxd: Fix memory leak when a wq is reset
Noroxi assessment
Priority: Monitor (action score 22/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.12% (FIRST EPSS).
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: Linux Linux 0c3d3ac57e3c52b570b8c695903306bff07e04c8, 39c1504e0e76bcfb93991fd94288a83e05d13b51, 5.8; azl3 kernel 6.6.130.1-3 on Azure Linux 3.0 6.6.134.1-2.
Low priority for now. Upgrade to Linux Linux 0c3d3ac57e3c52b570b8c695903306bff07e04c8, 39c1504e0e76bcfb93991fd94288a83e05d13b51, 5.8; azl3 kernel 6.6.130.1-3 on Azure Linux 3.0 6.6.134.1-2 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix memory leak when a wq is reset idxd_wq_disable_cleanup() which is called from the reset path for a workqueue, sets the wq type to NONE, which for other parts of the driver mean that the wq is empty (all its resources were released). Only set the wq type to NONE after its resources are released.
- Published
- Apr 22, 2026
- Updated
- Oct 15, 2026
- EPSS
- 0.1% · 2th percentile
- CWE
- CWE-401
Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.1%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel5.7.10 and later · before 5.8
- linux linux kernel5.8.1 and later · before 6.1.168
- linux linux kernel6.2 and later · before 6.6.131
- linux linux kernel6.7 and later · before 6.12.80
- linux linux kernel6.13 and later · before 6.18.21
- linux linux kernel6.19 and later · before 6.19.11
- linux linux kernel5.8
- linux linux kernel7.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 2a2df2bd10de44c3804661ed15157817c12d6291, 5.8affected
- da32b28c95a79e399e18c03f8178f41aec9c66e4 and later · before a16098a2f0c11ee5e04e23aa7478ca1fcfb0f658affected · git
- da32b28c95a79e399e18c03f8178f41aec9c66e4 and later · before 54d77cc0c40ca2f894859dc7b3c52997574f1a2aaffected · git
- da32b28c95a79e399e18c03f8178f41aec9c66e4 and later · before 39c1504e0e76bcfb93991fd94288a83e05d13b51affected · git
- da32b28c95a79e399e18c03f8178f41aec9c66e4 and later · before a9e7815d38629bcf59d3005001f1f315424a58deaffected · git
- da32b28c95a79e399e18c03f8178f41aec9c66e4 and later · before 0c3d3ac57e3c52b570b8c695903306bff07e04c8affected · git
- da32b28c95a79e399e18c03f8178f41aec9c66e4 and later · before d9cfb5193a047a92a4d3c0e91ea4cc87c8f7c478affected · git
- 5.7.10 and later · before 5.8affected · semver
- before 5.8not affected · semver
- 6.1.168 and later · up to and including 6.1.*not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.170-1 | 6.1.170-1 |
| Debian:13 | linux | before 6.12.85-1 | 6.12.85-1 |
| Debian:14 | linux | before 6.19.11-1 | 6.19.11-1 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7_Update_19 | before 1-150700.15.3.4 | 1-150700.15.3.4 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7-RT_Update_18 | before 1-150700.1.5.1 | 1-150700.1.5.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-64kb | before 6.4.0-150700.53.73.2 | 6.4.0-150700.53.73.2 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-default | before 6.4.0-150700.53.73.2 | 6.4.0-150700.53.73.2 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-default-base | before 6.4.0-150700.53.73.2.150700.17.41.4 | 6.4.0-150700.53.73.2.150700.17.41.4 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-source | before 6.4.0-150700.53.73.1 | 6.4.0-150700.53.73.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-zfcpdump | before 6.4.0-150700.53.73.2 | 6.4.0-150700.53.73.2 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | kernel-docs | before 6.4.0-150700.53.73.1 | 6.4.0-150700.53.73.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | kernel-obs-build | before 6.4.0-150700.53.73.2 | 6.4.0-150700.53.73.2 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | kernel-syms | before 6.4.0-150700.53.73.1 | 6.4.0-150700.53.73.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP7 | kernel-azure | before 6.4.0-150700.53.73.2 | 6.4.0-150700.53.73.2 |
| SUSE:Real Time Module 15 SP7 | kernel-rt | before 6.4.0-150700.7.67.1 | 6.4.0-150700.7.67.1 |
| SUSE:Real Time Module 15 SP7 | kernel-source-rt | before 6.4.0-150700.7.67.1 | 6.4.0-150700.7.67.1 |
| SUSE:Real Time Module 15 SP7 | kernel-syms-rt | before 6.4.0-150700.7.67.1 | 6.4.0-150700.7.67.1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2026-31435Apr 22, 2026 · netfs: Fix read abandonment during retry35Monitor
- ← EarlierCVE-2026-31436Apr 22, 2026 · dmaengine: idxd: fix possible wrong descriptor completion in llist_abort_desc()39Monitor
- Later →CVE-2026-31442Apr 22, 2026 · dmaengine: idxd: Fix possible invalid memory access after FLR31Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 0c3d3ac57e3c52b570b8c695903306bff07e04c8 | Vendor (CNA) |
| Linux Linux | 39c1504e0e76bcfb93991fd94288a83e05d13b51 | Vendor (CNA) |
| Linux Linux | 5.8 | Vendor (CNA) |
| Linux Linux | 54d77cc0c40ca2f894859dc7b3c52997574f1a2a | Vendor (CNA) |
| Linux Linux | a16098a2f0c11ee5e04e23aa7478ca1fcfb0f658 | Vendor (CNA) |
| Linux Linux | a9e7815d38629bcf59d3005001f1f315424a58de | Vendor (CNA) |
| Linux Linux | d9cfb5193a047a92a4d3c0e91ea4cc87c8f7c478 | Vendor (CNA) |
| azl3 kernel 6.6.130.1-3 on Azure Linux 3.0 | 6.6.134.1-2 · CBL-Mariner Releases | Microsoft (MSRC) |
| debian:linux | 6.1.170-1 · Debian:12 | Package registry (OSV) |
| suse:kernel-64kb | 6.4.0-150700.53.73.2 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
| suse:kernel-default | 6.4.0-150700.53.73.2 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
| suse:kernel-default-base | 6.4.0-150700.53.73.2.150700.17.41.4 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
| suse:kernel-docs | 6.4.0-150700.53.73.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP7-RT_Update_18 | 1-150700.1.5.1 · SUSE:Linux Enterprise Live Patching 15 SP7 | Package registry (OSV) |
| suse:kernel-obs-build | 6.4.0-150700.53.73.2 · SUSE:Linux Enterprise Module for Development Tools 15 SP7 | Package registry (OSV) |
| suse:kernel-rt | 6.4.0-150700.7.67.1 · SUSE:Real Time Module 15 SP7 | Package registry (OSV) |
| suse:kernel-source | 6.4.0-150700.53.73.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
| suse:kernel-source-rt | 6.4.0-150700.7.67.1 · SUSE:Real Time Module 15 SP7 | Package registry (OSV) |
| suse:kernel-syms | 6.4.0-150700.53.73.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP7 | Package registry (OSV) |
| suse:kernel-syms-rt | 6.4.0-150700.7.67.1 · SUSE:Real Time Module 15 SP7 | Package registry (OSV) |
| suse:kernel-zfcpdump | 6.4.0-150700.53.73.2 · SUSE:Linux Enterprise Module for Basesystem 15 SP7 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-401 · Missing Release of Memory after Effective LifetimeCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (8 more)Show less
- git.kernel.org/stable/c/39c1504e0e76bcfb93991fd94288a83e05d13b51
- git.kernel.org/stable/c/54d77cc0c40ca2f894859dc7b3c52997574f1a2a
- git.kernel.org/stable/c/a16098a2f0c11ee5e04e23aa7478ca1fcfb0f658
- git.kernel.org/stable/c/a9e7815d38629bcf59d3005001f1f315424a58de
- git.kernel.org/stable/c/d9cfb5193a047a92a4d3c0e91ea4cc87c8f7c478
- cert-portal.siemens.com/productcert/html/ssa-019113.html
- cert-portal.siemens.com/productcert/html/ssa-082556.html
- cert-portal.siemens.com/productcert/html/ssa-457936.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.