CVE-2026-89749: Linux vulnerability

CVE-2026-89749: tracing: Fix crash passing ERR_PTR to kthread_stop()

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()").

UnknownCVSS not scoredNot KEV-listedUpdatedOct 19, 2026, 08:52 UTC (UTC+00:00)

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Sep 11, 2026, 19:46 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

0ADP providers

9Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
Sep 11, 2026, 19:38 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
Sep 11, 2026, 19:46 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Oct 19, 2026, 08:52 UTC (UTC+00:00)

Source materials

CVE List V5 sourceCVE List V5
https://git.kernel.org/stable/c/c1a4fb7aa290f158d50654d640292e49d9055fd1CVE reference, Linux
https://git.kernel.org/stable/c/42ccb215ef0a552acbbd32f81009bfe4b278ba77CVE reference, Linux
https://git.kernel.org/stable/c/98d06fb9865a490e12ebe32d65b9ffac6108614dCVE reference, Linux
https://git.kernel.org/stable/c/ceb1707aef5824cf024eb82d10787b7621e2ff35CVE reference, Linux
https://git.kernel.org/stable/c/12a499f741fc5be3731c8b0a0d909406575cc2ebCVE reference, Linux
https://git.kernel.org/stable/c/adadf4192f700bca82abfda9fa6d58c0bf37cc04CVE reference, Linux
https://git.kernel.org/stable/c/c40e0b4fa365969e67011529eabdfb66d1022256CVE reference, Linux
https://git.kernel.org/stable/c/649bc7df3e5d7be6f7996a95084037dbf3cad1e5CVE reference, Linux

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

LinuxLinuxe6187007d6c365b551c69ea3df46f06fd1c8bd19, e6187007d6c365b551c69ea3df46f06fd1c8bd19, e6187007d6c365b551c69ea3df46f06fd1c8bd19, e6187007d6c365b551c69ea3df46f06fd1c8bd19, e6187007d6c365b551c69ea3df46f06fd1c8bd19, e6187007d6c365b551c69ea3df46f06fd1c8bd19, e6187007d6c365b551c69ea3df46f06fd1c8bd19, e6187007d6c365b551c69ea3df46f06fd1c8bd19unaffected

LinuxLinux2.6.31, 0, 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, 7.2.4, 7.3affected

Weakness

CWE details

No CWE listed

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