io-wq: check for wq exit after adding new worker task_work
In the Linux kernel, the following vulnerability has been resolved: io-wq: check for wq exit after adding new worker task_work We check IO_WQ_BIT_EXIT before attempting to create a new worker, and wq exit cancels pending work if we have any. But it's possible to have a race between the two, where creation checks exit finding it not set, but we're in the process of exiting. The exit side will cancel pending creation task_work, but there's a gap where we add task_work after we've canceled existing creations at exit time. Fix this by checking the EXIT bit post adding the creation task_work. If it's set, run the same cancelation that exit does.
- Published
- Jun 19, 2024
- Updated
- Aug 5, 2026
- EPSS
- 0.2% · 4th percentile
- CWE
- CWE-362
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Report tools
Action score
18
Monitor
Low priority for now.
- CVSS
- 18 / 40 · 4.7 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 4.7
- CNA · Linux
- 7.8
- 3.1 point gap
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| 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 kernelbefore 5.15.11
- linux linux kernel5.16
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
- 5.13affected
- 685fe7feedb96771683437107ba72131410e2350 and later · before 4b4e5bbf9386d4ec21d91c0cb0fd60b9bba778ecaffected · git
- 685fe7feedb96771683437107ba72131410e2350 and later · before 71a85387546e50b1a37b0fa45dadcae3bfb35cf6affected · git
- before 5.13not affected · semver
- 5.15.11 and later · up to and including 5.15.*not affected · semver
- 5.16 and laternot affected · original_commit_for_fix
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 5.15.15-1 | 5.15.15-1 |
| openSUSE:Leap 15.5 | dtb-aarch64 | before 5.14.21-150500.55.73.1 | 5.14.21-150500.55.73.1 |
| openSUSE:Leap 15.5 | kernel-debug | before 5.14.21-150500.55.73.1 | 5.14.21-150500.55.73.1 |
| openSUSE:Leap 15.5 | kernel-kvmsmall | before 5.14.21-150500.55.73.1 | 5.14.21-150500.55.73.1 |
| openSUSE:Leap 15.5 | kernel-obs-qa | before 5.14.21-150500.55.73.1 | 5.14.21-150500.55.73.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_17 | before 1-150500.11.3.1 | 1-150500.11.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_17 | before 1-150500.11.3.1 | 1-150500.11.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5-RT_Update_17 | before 1-150500.11.3.1 | 1-150500.11.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5-RT_Update_17 | before 1-150500.11.3.1 | 1-150500.11.3.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-default | before 5.14.21-150500.55.73.1 | 5.14.21-150500.55.73.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-default | before 5.14.21-150500.55.73.1 | 5.14.21-150500.55.73.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-default-base | before 5.14.21-150500.55.73.1.150500.6.33.8 | 5.14.21-150500.55.73.1.150500.6.33.8 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-default-base | before 5.14.21-150500.55.73.1.150500.6.33.8 | 5.14.21-150500.55.73.1.150500.6.33.8 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-rt | before 5.14.21-150500.13.61.1 | 5.14.21-150500.13.61.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-rt | before 5.14.21-150500.13.61.1 | 5.14.21-150500.13.61.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-source-rt | before 5.14.21-150500.13.61.1 | 5.14.21-150500.13.61.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-source-rt | before 5.14.21-150500.13.61.1 | 5.14.21-150500.13.61.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP5 | kernel-64kb | before 5.14.21-150500.55.73.1 | 5.14.21-150500.55.73.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP5 | kernel-64kb | before 5.14.21-150500.55.73.1 | 5.14.21-150500.55.73.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP5 | kernel-source | before 5.14.21-150500.55.73.1 | 5.14.21-150500.55.73.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP5 | kernel-source | before 5.14.21-150500.55.73.1 | 5.14.21-150500.55.73.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP5 | kernel-zfcpdump | before 5.14.21-150500.55.73.1 | 5.14.21-150500.55.73.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP5 | kernel-zfcpdump | before 5.14.21-150500.55.73.1 | 5.14.21-150500.55.73.1 |
| SUSE:Linux Enterprise Module for Development Tools 15 SP5 | kernel-docs | before 5.14.21-150500.55.73.2 | 5.14.21-150500.55.73.2 |
+15
Same product
linux: all recordsOther highest-scoring records for the same primary product.
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- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
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 | 4b4e5bbf9386d4ec21d91c0cb0fd60b9bba778ec | Vendor (CNA) |
| Linux Linux | 71a85387546e50b1a37b0fa45dadcae3bfb35cf6 | Vendor (CNA) |
| debian:linux | 5.15.15-1 · Debian:12 | Package registry (OSV) |
| opensuse:kernel-azure | 5.14.21-150500.33.60.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-rt | 5.14.21-150500.13.61.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-source-azure | 5.14.21-150500.33.60.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| opensuse:kernel-syms-azure | 5.14.21-150500.33.60.1 · openSUSE:Leap 15.5 | Package registry (OSV) |
| suse:kernel-azure | 5.14.21-150500.33.60.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP5 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP5-RT_Update_17 | 1-150500.11.3.1 · SUSE:Linux Enterprise Live Patching 15 SP5 | Package registry (OSV) |
| suse:kernel-rt | 5.14.21-150500.13.61.1 · SUSE:Linux Enterprise Micro 5.5 | Package registry (OSV) |
| suse:kernel-rt_debug | 5.14.21-150500.13.61.1 · SUSE:Real Time Module 15 SP5 | Package registry (OSV) |
| suse:kernel-source-azure | 5.14.21-150500.33.60.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP5 | Package registry (OSV) |
| suse:kernel-source-rt | 5.14.21-150500.13.61.1 · SUSE:Linux Enterprise Micro 5.5 | Package registry (OSV) |
| suse:kernel-syms-azure | 5.14.21-150500.33.60.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP5 | Package registry (OSV) |
| suse:kernel-syms-rt | 5.14.21-150500.13.61.1 · SUSE:Real Time Module 15 SP5 | 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.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
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.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- High
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')CVSS vector
CVSS:3.1/AV:L/AC:H/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.
Attack patterns (CAPEC)
ATT&CK techniques
—
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/4b4e5bbf9386d4ec21d91c0cb0fd60b9bba778ec
- git.kernel.org/stable/c/71a85387546e50b1a37b0fa45dadcae3bfb35cf6
Vendor advisories and official records. Exploit/PoC links are deliberately left out.