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CVE-2026-90416

Unknown

Last modified

CVE-2026-90416 is a vulnerability of currently unknown severity. 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.

Description

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172, < 1c5b4f76cd73372c5a8a4c91c95d5a31f141e091; >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172, < 06b62758f81e27ca4c81201c22e3436c6d9ac894; >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172, < d809cf3f0ed9255abfc73c4730bcf187151422af; >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172, < 0b0122fcc923a0271130f5fb71af2cd7e20434d9; >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172, < ce8dfd32a33b578c3abf178f67b4c8d36854f041; >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172, < 4599311e78e88c893ad551aca622de2bfdf1c31f; >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172, < c75ee076fa09778a2f9602a972dade4a0b0785f7; >= 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172, < 03826bc1fa6c90405bf05831f2b501a8368dcd27
LinuxLinux4.14

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-90416?
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.
How severe is CVE-2026-90416?
Severity scoring for CVE-2026-90416 is pending analysis.
How do I fix CVE-2026-90416?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST