tracing: Fix crash passing ERR_PTR to kthread_stop()
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 7 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix crash passing ERR_PTR to kthread_stop() event_test_stuff() calls kthread_run() and unconditionally passes the returned task_struct pointer to kthread_stop(). kthread_run() returns an error pointer such as ERR_PTR(-ENOMEM) when kthread creation fails, for example under memory pressure during the boot-time event self-test. kthread_stop() then dereferences the invalid pointer, crashing the kernel. Check the result of kthread_run() before passing it to kthread_stop(). Use WARN_ON() so that a failure to create the self-test thread does not go unnoticed, matching the ring-buffer self-test fix in commit 91542863abad ("ring-buffer: Fix crash passing ERR_PTR to kthread_stop()").
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.31 and later | 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4, 7.3 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.31 and later Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4, 7.3 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4, 7.3
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-89749
- 2026-10-03 Alias added: GHSA-hwhc-m4xq-f4r2
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-11-07 Affected versions changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/c1a4fb7aa290f158d50654d640292e49d9055fd1
- https://git.kernel.org/stable/c/42ccb215ef0a552acbbd32f81009bfe4b278ba77
- https://git.kernel.org/stable/c/98d06fb9865a490e12ebe32d65b9ffac6108614d
- https://git.kernel.org/stable/c/ceb1707aef5824cf024eb82d10787b7621e2ff35
- https://git.kernel.org/stable/c/12a499f741fc5be3731c8b0a0d909406575cc2eb
- https://git.kernel.org/stable/c/adadf4192f700bca82abfda9fa6d58c0bf37cc04
- https://git.kernel.org/stable/c/c40e0b4fa365969e67011529eabdfb66d1022256
- https://git.kernel.org/stable/c/649bc7df3e5d7be6f7996a95084037dbf3cad1e5
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Sources
- CVE-2026-89749 · CVE Program
- CVE-2026-89749 · NVD
- FIRST EPSS
- GHSA-hwhc-m4xq-f4r2 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-89749 · Red Hat security data · CC BY 4.0
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