CVE-2026-89749Medium· 5.5▾ SunlitIn 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…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 4.4
none → medium
— → 5.5
none → medium
0.2% → 0.2%
Last analysed / modified upstream
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()").
Linux >= e6187007d6c365b551c69ea3df46f06fd1c8bd19 < c1a4fb7aa290f158d50654d640292e49d9055fd1Linux >= e6187007d6c365b551c69ea3df46f06fd1c8bd19 < 42ccb215ef0a552acbbd32f81009bfe4b278ba77Linux >= e6187007d6c365b551c69ea3df46f06fd1c8bd19 < 98d06fb9865a490e12ebe32d65b9ffac6108614dLinux >= e6187007d6c365b551c69ea3df46f06fd1c8bd19 < ceb1707aef5824cf024eb82d10787b7621e2ff35Linux >= e6187007d6c365b551c69ea3df46f06fd1c8bd19 < 12a499f741fc5be3731c8b0a0d909406575cc2ebLinux >= e6187007d6c365b551c69ea3df46f06fd1c8bd19 < adadf4192f700bca82abfda9fa6d58c0bf37cc04Linux >= e6187007d6c365b551c69ea3df46f06fd1c8bd19 < c40e0b4fa365969e67011529eabdfb66d1022256Linux >= e6187007d6c365b551c69ea3df46f06fd1c8bd19 < 649bc7df3e5d7be6f7996a95084037dbf3cad1e5Linux 2.6.31Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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