CVE-2026-90389 Affecting kernel6.12-tools-debuginfo package, versions <1:6.12.110-135.201.amzn2023
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-AMZN2023-KERNEL612TOOLSDEBUGINFO-20864112
- published13 Oct 2026
- disclosed17 Sept 2026
Introduced: 17 Sep 2026
CVE-2026-90389 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2023 kernel6.12-tools-debuginfo to version 1:6.12.110-135.201.amzn2023 or higher.
This issue was patched in ALAS2023-2026-3196.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel6.12-tools-debuginfo package and not the kernel6.12-tools-debuginfo package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
md: scope memalloc_noio to allocation critical sections
Storing a memalloc_noio_save() token in mddev->noio_flags lets one task save the token and another task restore it. With concurrent suspend sysfs writes, task A can enter PF_MEMALLOC_NOIO, return to userspace still in that scope, and later task B can restore A's saved token.
Avoid tying the token lifetime to mddev. Keep mddev_suspend() and mddev_resume() only responsible for array suspension, and enter PF_MEMALLOC_NOIO only in the MD paths that allocate memory after the array has been suspended. Restore the token before resuming the array.
A reproducer repeatedly writes suspend_lo and suspend_hi from concurrent workers and checks each worker's /proc/self/stat flags before and after the sysfs write.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-90389
- https://git.kernel.org/stable/c/28fdea874f68cac6c36651b1fc7272fd2199c48d
- https://git.kernel.org/stable/c/72ebfdf507ede7d7f2b7ca0a5634811a0e4bf045
- https://git.kernel.org/stable/c/a58923756b0f8e71032070c23ae0b167e46731da
- https://git.kernel.org/stable/c/bace2010dd7ac07bc980575afb135c406730a7fe