CVE-2026-93054 Affecting kernel-tools-devel package, versions <1:6.1.188-233.385.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-KERNELTOOLSDEVEL-20869422
- published13 Oct 2026
- disclosed17 Sept 2026
Introduced: 17 Sep 2026
NewCVE-2026-93054 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2023 kernel-tools-devel to version 1:6.1.188-233.385.amzn2023 or higher.
This issue was patched in ALAS2023-2026-3197.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-tools-devel package and not the kernel-tools-devel 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:
uio: Fix stale info pointer in failed registration path
After device_add(), the UIO device is visible to userspace and /dev/uioX can be opened. If a later setup step fails, __uio_register_device() unwinds the device but leaves idev->info pointing at the caller-owned struct uio_info.
That is unsafe when an opener races with the failed registration path. The open file keeps a reference to the uio_device, while the caller sees registration failure and may free its struct uio_info. Later file operations can then follow idev->info and dereference freed memory.
Handle post-device_add() failures like unregister: remove UIO attributes while the info pointer is still valid, then clear idev->info under info_lock and wake existing waiters/async users before removing the device and minor. This makes already-open file descriptors observe the same "device gone" state as normal uio_unregister_device().
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-93054
- https://git.kernel.org/stable/c/15340b00e665af805523b08515294a1aa1778151
- https://git.kernel.org/stable/c/16695e9059d80ea6661e8399064b0c01f641dd8c
- https://git.kernel.org/stable/c/234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac
- https://git.kernel.org/stable/c/506b43dde5f9ac0068b1360e6b5dbee07fda59fb
- https://git.kernel.org/stable/c/63eaa7663335d482a8825c231213e312cacea567
- https://git.kernel.org/stable/c/67b6fc084b034a91c3ec7907a3fed89a2450f30b
- https://git.kernel.org/stable/c/df4faf65194ec6c315a59be4c6749eaeb3009243
- https://git.kernel.org/stable/c/ec5bd6731183eb6f619140c9bef2ee11ed818c20