CVE-2022-48932 net/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte

2024-08-2203:31:25

Linux

www.cve.org

linux kernel

vulnerability

net/mlx5

slab-out-of-bounds

mlx5_cmd_dr_create_fte

buffer allocation

action limit

EPSS

Percentile

9.5%

JSON

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: DR, Fix slab-out-of-bounds in mlx5_cmd_dr_create_fte

When adding a rule with 32 destinations, we hit the following out-of-band
access issue:

BUG: KASAN: slab-out-of-bounds in mlx5_cmd_dr_create_fte+0x18ee/0x1e70

This patch fixes the issue by both increasing the allocated buffers to
accommodate for the needed actions and by checking the number of actions
to prevent this issue when a rule with too many actions is provided.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/ethernet/mellanox/mlx5/core/steering/fs_dr.c"
    ],
    "versions": [
      {
        "version": "1ffd498901c1",
        "lessThan": "4ad319cdfbe5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1ffd498901c1",
        "lessThan": "0aec12d97b20",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/ethernet/mellanox/mlx5/core/steering/fs_dr.c"
    ],
    "versions": [
      {
        "version": "5.16",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.16",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.16.12",
        "lessThanOrEqual": "5.16.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.17",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]