CVE-2026-99250

In the Linux kernel, the following vulnerability has been resolved: printk: Postpone kthread startup There have been various bug reports related to SMP systems hanging on boot. The reports vary but seem to have some overlap with regard to missed IPI's during SMP setup. The reports also show that reverting NBCON console usage allows the bugs to disappear. The NBCON kthreads for console printing are started very early during boot using early_initcall(). Since these kthreads are asynchronously enabling/disabling interrupts during early boot, they may be interfering with early SMP setup on some hardware platforms. Starting the console printing kthreads later has shown to avoid the hanging on systems that could previously reproduce the issue. Postpone kthread starting until after all arch initcalls have completed.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/5f339c46f153184570f16c8e789c9709b14cbe8b
https://git.kernel.org/stable/c/7595bacee48bc30b5021eccf199d704d4e5e5374
https://git.kernel.org/stable/c/792acd173da0884f0172c68cb473f42cf93c647e
https://git.kernel.org/stable/c/a86bcdd84c8fe7a45f73e12d53fe06fea07d1ceb

Configurations

No configuration.

History

03 Nov 2026, 12:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-11-03 12:17

Updated : 2026-11-03 12:17

NVD link : CVE-2026-99250

Mitre link : CVE-2026-99250

CVE.ORG link : CVE-2026-99250

JSON object : View

Products Affected

No product.

CWE

No CWE.

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