CVE-2026-90416RDMA/mlx5: Fix stack out-of-bounds read in cc_params debugfs
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 builds before 1c5b4f76cd73372c5a8a4c91c95d5a31f141e091; from 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 before 06b62758f81e27ca4c81201c22e3436c6d9ac894; from 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 before d809cf3f0ed9255abfc73c4730bcf187151422af; 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 builds before 0b0122fcc923a0271130f5fb71af2cd7e20434d9; from 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 before ce8dfd32a33b578c3abf178f67b4c8d36854f041; from 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 before 4599311e78e88c893ad551aca622de2bfdf1c31f; from 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 before c75ee076fa09778a2f9602a972dade4a0b0785f7; from 4a2da0b8c0782816f3ae6846ae7942fcbb0f8172 before 03826bc1fa6c90405bf05831f2b501a8368dcd27 | CNA record |
References
- https://git.kernel.org/stable/c/1c5b4f76cd73372c5a8a4c91c95d5a31f141e091
- https://git.kernel.org/stable/c/06b62758f81e27ca4c81201c22e3436c6d9ac894
- https://git.kernel.org/stable/c/d809cf3f0ed9255abfc73c4730bcf187151422af
- https://git.kernel.org/stable/c/0b0122fcc923a0271130f5fb71af2cd7e20434d9
- https://git.kernel.org/stable/c/ce8dfd32a33b578c3abf178f67b4c8d36854f041
- https://git.kernel.org/stable/c/4599311e78e88c893ad551aca622de2bfdf1c31f
- https://git.kernel.org/stable/c/c75ee076fa09778a2f9602a972dade4a0b0785f7
- https://git.kernel.org/stable/c/03826bc1fa6c90405bf05831f2b501a8368dcd27
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.