CVE-2026-90416 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-20874430
- published13 Oct 2026
- disclosed17 Sept 2026
Introduced: 17 Sep 2026
NewCVE-2026-90416 (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:
RDMA/mlx5: Fix stack out-of-bounds read in cc_params debugfs
get_param() reads a congestion parameter as a u32 but formats it with the signed "%d" into an 11-byte stack buffer. A value with bit 31 set, such as 0x80000000, renders as "-2147483648\n" whose full length is 12. snprintf() stores only 11 bytes yet returns 12, so simple_read_from_buffer() treats 12 bytes as valid and reads one byte past lbuf[].
Size the buffer for the widest unsigned decimal, format with "%u" to match the u32, and use scnprintf() so the length passed to simple_read_from_buffer() reflects the bytes actually stored.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-90416
- https://git.kernel.org/stable/c/03826bc1fa6c90405bf05831f2b501a8368dcd27
- https://git.kernel.org/stable/c/06b62758f81e27ca4c81201c22e3436c6d9ac894
- https://git.kernel.org/stable/c/0b0122fcc923a0271130f5fb71af2cd7e20434d9
- https://git.kernel.org/stable/c/1c5b4f76cd73372c5a8a4c91c95d5a31f141e091
- https://git.kernel.org/stable/c/4599311e78e88c893ad551aca622de2bfdf1c31f
- https://git.kernel.org/stable/c/c75ee076fa09778a2f9602a972dade4a0b0785f7
- https://git.kernel.org/stable/c/ce8dfd32a33b578c3abf178f67b4c8d36854f041
- https://git.kernel.org/stable/c/d809cf3f0ed9255abfc73c4730bcf187151422af