GHSA-5QWC-6C47-M348
Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-17 18:32In 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": [],
"aliases": [
"CVE-2026-90416"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:45Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix stack out-of-bounds read in cc_params debugfs\n\nget_param() reads a congestion parameter as a u32 but formats it with the\nsigned \"%d\" into an 11-byte stack buffer. A value with bit 31 set, such as\n0x80000000, renders as \"-2147483648\\n\" whose full length is 12. snprintf()\nstores only 11 bytes yet returns 12, so simple_read_from_buffer() treats 12\nbytes as valid and reads one byte past lbuf[].\n\nSize the buffer for the widest unsigned decimal, format with \"%u\" to match\nthe u32, and use scnprintf() so the length passed to\nsimple_read_from_buffer() reflects the bytes actually stored.",
"id": "GHSA-5qwc-6c47-m348",
"modified": "2026-09-17T18:32:04Z",
"published": "2026-09-17T18:32:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90416"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/03826bc1fa6c90405bf05831f2b501a8368dcd27"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/06b62758f81e27ca4c81201c22e3436c6d9ac894"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0b0122fcc923a0271130f5fb71af2cd7e20434d9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1c5b4f76cd73372c5a8a4c91c95d5a31f141e091"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4599311e78e88c893ad551aca622de2bfdf1c31f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c75ee076fa09778a2f9602a972dade4a0b0785f7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ce8dfd32a33b578c3abf178f67b4c8d36854f041"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d809cf3f0ed9255abfc73c4730bcf187151422af"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.