CVE-2026-31480: tracing: Fix potential deadlock in cpu hotplug with osnoise
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: 0.09% (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 03474a01c199de17a8e2d39b51df6beb9c76e831, 1f9885732248d22f788e4992c739a98c88ab8a55, 7a41d4633cd2c15eb5ed31e8f3b16910e50a8c9f; cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0 Release Notes.
Low priority for now. Upgrade to Linux Linux 03474a01c199de17a8e2d39b51df6beb9c76e831, 1f9885732248d22f788e4992c739a98c88ab8a55, 7a41d4633cd2c15eb5ed31e8f3b16910e50a8c9f; cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0 Release Notes 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: tracing: Fix potential deadlock in cpu hotplug with osnoise The following sequence may leads deadlock in cpu hotplug: task1 task2 task3 ----- ----- ----- mutex_lock(&interface_lock) [CPU GOING OFFLINE] cpus_write_lock(); osnoise_cpu_die(); kthread_stop(task3); wait_for_completion(); osnoise_sleep(); mutex_lock(&interface_lock); cpus_read_lock(); [DEAD LOCK] Fix by swap the order of cpus_read_lock() and mutex_lock(&interface_lock).
- Published
- Apr 22, 2026
- Updated
- Jun 17, 2026
- EPSS
- 0.0% · 0th percentile
- CWE
- CWE-667
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 · 0.0%
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 kernel5.14.1 and later · before 5.15.203
- linux linux kernel5.16 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 kernel5.14
- 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
- 5.14affected
- bce29ac9ce0bb0b0b146b687ab978378c21e9078 and later · before cf929c21eeed5bd39873fb14bfdfff963fa6f1daaffected · git
- bce29ac9ce0bb0b0b146b687ab978378c21e9078 and later · before 7aa095ce7d224308cb6979956f0de8607df93d4faffected · git
- bce29ac9ce0bb0b0b146b687ab978378c21e9078 and later · before ef41a85a55022e27cdaebf22a6676910b66f65aaaffected · git
- bce29ac9ce0bb0b0b146b687ab978378c21e9078 and later · before 03474a01c199de17a8e2d39b51df6beb9c76e831affected · git
- bce29ac9ce0bb0b0b146b687ab978378c21e9078 and later · before f278b8ebf7eba2a1699cfc7bf30dd3ef898d60d7affected · git
- bce29ac9ce0bb0b0b146b687ab978378c21e9078 and later · before 7a41d4633cd2c15eb5ed31e8f3b16910e50a8c9faffected · git
- bce29ac9ce0bb0b0b146b687ab978378c21e9078 and later · before 1f9885732248d22f788e4992c739a98c88ab8a55affected · git
- before 5.14not affected · semver
- 5.15.203 and later · up to and including 5.15.*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_16 | before 1-150700.15.3.2 | 1-150700.15.3.2 |
| SUSE:Linux Enterprise Live Patching 15 SP7 | kernel-livepatch-SLE15-SP7-RT_Update_16 | before 1-150700.1.5.2 | 1-150700.1.5.2 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-64kb | before 6.4.0-150700.53.60.1 | 6.4.0-150700.53.60.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-default | before 6.4.0-150700.53.60.1 | 6.4.0-150700.53.60.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-default-base | before 6.4.0-150700.53.60.1.150700.17.35.4 | 6.4.0-150700.53.60.1.150700.17.35.4 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-source | before 6.4.0-150700.53.60.1 | 6.4.0-150700.53.60.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | kernel-zfcpdump | before 6.4.0-150700.53.60.1 | 6.4.0-150700.53.60.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | kernel-docs | before 6.4.0-150700.53.60.1 | 6.4.0-150700.53.60.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | kernel-obs-build | before 6.4.0-150700.53.60.2 | 6.4.0-150700.53.60.2 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP7 | kernel-syms | before 6.4.0-150700.53.60.1 | 6.4.0-150700.53.60.1 |
| SUSE:Linux Enterprise Module for Public Cloud 15 SP7 | kernel-azure | before 6.4.0-150700.53.60.1 | 6.4.0-150700.53.60.1 |
| SUSE:Linux Enterprise Server 16.0 | kernel-azure | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Enterprise Server 16.0 | kernel-docs | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Enterprise Server 16.0 | kernel-kvmsmall | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Enterprise Server 16.0 | kernel-obs-qa | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Enterprise Server 16.0 | kernel-zfcpdump | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
| SUSE:Linux Micro 6.0 | kernel-default | before 6.4.0-47.1 | 6.4.0-47.1 |
| SUSE:Linux Micro 6.0 | kernel-default-base | before 6.4.0-47.1.21.24 | 6.4.0-47.1.21.24 |
| SUSE:Linux Micro 6.0 | kernel-kvmsmall | before 6.4.0-47.1 | 6.4.0-47.1 |
| SUSE:Linux Micro 6.0 | kernel-source | before 6.4.0-47.1 | 6.4.0-47.1 |
| SUSE:Linux Micro 6.2 | kernel-64kb | before 6.12.0-160000.34.1 | 6.12.0-160000.34.1 |
+9
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-2026-31476Apr 22, 2026 · ksmbd: do not expire session on binding failure32Monitor
- ← EarlierCVE-2026-31477Apr 22, 2026 · ksmbd: fix memory leaks and NULL deref in smb2_lock()30Monitor
- Later →CVE-2026-31481Apr 22, 2026 · tracing: Drain deferred trigger frees if kthread creation fails22Monitor
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 | 03474a01c199de17a8e2d39b51df6beb9c76e831 | Vendor (CNA) |
| Linux Linux | 1f9885732248d22f788e4992c739a98c88ab8a55 | Vendor (CNA) |
| Linux Linux | 7a41d4633cd2c15eb5ed31e8f3b16910e50a8c9f | Vendor (CNA) |
| Linux Linux | 7aa095ce7d224308cb6979956f0de8607df93d4f | Vendor (CNA) |
| Linux Linux | cf929c21eeed5bd39873fb14bfdfff963fa6f1da | Vendor (CNA) |
| Linux Linux | ef41a85a55022e27cdaebf22a6676910b66f65aa | Vendor (CNA) |
| Linux Linux | f278b8ebf7eba2a1699cfc7bf30dd3ef898d60d7 | Vendor (CNA) |
| cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0 | Release Notes | Microsoft (MSRC) |
| debian:linux | 6.1.170-1 · Debian:12 | Package registry (OSV) |
| suse:kernel-64kb | 6.12.0-160000.34.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-azure | 6.12.0-160000.34.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
| suse:kernel-default | 6.12.0-160000.34.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-default-base | 6.12.0-160000.34.1.160000.2.15 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-docs | 6.12.0-160000.34.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
| suse:kernel-kvmsmall | 6.12.0-160000.34.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
| suse:kernel-obs-build | 6.12.0-160000.34.1 · SUSE:Linux Micro Extras 6.2 | Package registry (OSV) |
| suse:kernel-obs-qa | 6.12.0-160000.34.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
| suse:kernel-rt | 6.12.0-160000.34.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-source | 6.12.0-160000.34.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:kernel-syms | 6.12.0-160000.34.1 · SUSE:Linux Micro Extras 6.2 | Package registry (OSV) |
| suse:kernel-zfcpdump | 6.12.0-160000.34.1 · SUSE:Linux Enterprise Server 16.0 | 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-667 · Improper LockingCVSS 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.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (6 more)Show less
- git.kernel.org/stable/c/1f9885732248d22f788e4992c739a98c88ab8a55
- git.kernel.org/stable/c/7a41d4633cd2c15eb5ed31e8f3b16910e50a8c9f
- git.kernel.org/stable/c/7aa095ce7d224308cb6979956f0de8607df93d4f
- git.kernel.org/stable/c/cf929c21eeed5bd39873fb14bfdfff963fa6f1da
- git.kernel.org/stable/c/ef41a85a55022e27cdaebf22a6676910b66f65aa
- git.kernel.org/stable/c/f278b8ebf7eba2a1699cfc7bf30dd3ef898d60d7
Vendor advisories and official records. Exploit/PoC links are deliberately left out.