CVE-2024-38556 net/mlx5: Add a timeout to acquire the command queue semaphore

2024-06-1913:35:26

Linux

github.com

linux kernel

vulnerability resolved

semaphore acquisition

AI Score

Confidence

Low

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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

net/mlx5: Add a timeout to acquire the command queue semaphore

Prevent forced completion handling on an entry that has not yet been
assigned an index, causing an out of bounds access on idx = -22.
Instead of waiting indefinitely for the sem, blocking flow now waits for
index to be allocated or a sem acquisition timeout before beginning the
timer for FW completion.

Kernel log example:
mlx5_core 0000:06:00.0: wait_func_handle_exec_timeout:1128:(pid 185911): cmd[-22]: CREATE_UCTX(0xa04) No done completion

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "8e715cd613a1",
        "lessThan": "4baae687a20e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8e715cd613a1",
        "lessThan": "f9caccdd42e9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8e715cd613a1",
        "lessThan": "2d0962d05c93",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8e715cd613a1",
        "lessThan": "94024332a129",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8e715cd613a1",
        "lessThan": "485d65e13571",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/ethernet/mellanox/mlx5/core/cmd.c",
      "include/linux/mlx5/driver.h"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.17"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.17",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "6.1.93",
        "versionType": "custom",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.33",
        "versionType": "custom",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.8.12",
        "versionType": "custom",
        "lessThanOrEqual": "6.8.*"
      },
      {
        "status": "unaffected",
        "version": "6.9.3",
        "versionType": "custom",
        "lessThanOrEqual": "6.9.*"
      },
      {
        "status": "unaffected",
        "version": "6.10",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/ethernet/mellanox/mlx5/core/cmd.c",
      "include/linux/mlx5/driver.h"
    ],
    "defaultStatus": "affected"
  }
]