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RDMA/mlx5: Fix stack out-of-bounds read in cc_params debugfs

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

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
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Publisher date
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