RDMA/mlx5: Fix stack out-of-bounds read in cc_params debugfs
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.
CVE-2026-90416
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90416
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4a2da0b8c0782816f3ae6846ae7942fcbb0f8172",
"lessThan": "1c5b4f76cd73372c5a8a4c91c95d5a31f141e091",
"versionType": "git"
},
{
"status": "affected",
"version": "4a2da0b8c0782816f3ae6846ae7942fcbb0f8172",
"lessThan": "06b62758f81e27ca4c81201c22e3436c6d9ac894",
"versionType": "git"
},
{
"status": "affected",
"version": "4a2da0b8c0782816f3ae6846ae7942fcbb0f8172",
"lessThan": "d809cf3f0ed9255abfc73c4730bcf187151422af",
"versionType": "git"
},
{
"status": "affected",
"version": "4a2da0b8c0782816f3ae6846ae7942fcbb0f8172",
"lessThan": "0b0122fcc923a0271130f5fb71af2cd7e20434d9",
"versionType": "git"
},
{
"status": "affected",
"version": "4a2da0b8c0782816f3ae6846ae7942fcbb0f8172",
"lessThan": "ce8dfd32a33b578c3abf178f67b4c8d36854f041",
"versionType": "git"
},
{
"status": "affected",
"version": "4a2da0b8c0782816f3ae6846ae7942fcbb0f8172",
"lessThan": "4599311e78e88c893ad551aca622de2bfdf1c31f",
"versionType": "git"
},
{
"status": "affected",
"version": "4a2da0b8c0782816f3ae6846ae7942fcbb0f8172",
"lessThan": "c75ee076fa09778a2f9602a972dade4a0b0785f7",
"versionType": "git"
},
{
"status": "affected",
"version": "4a2da0b8c0782816f3ae6846ae7942fcbb0f8172",
"lessThan": "03826bc1fa6c90405bf05831f2b501a8368dcd27",
"versionType": "git"
}
],
"programFiles": [
"drivers/infiniband/hw/mlx5/cong.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/infiniband/hw/mlx5/cong.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90416
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36736 · Revision 1
- Added to Heist Feed
- Publisher date