CVE-2021-47138 cxgb4: avoid accessing registers when clearing filters

2024-03-2509:07:37

Linux

github.com

linux kernel

vulnerability

cxgb4

hardware register

aer fatal error

out-of-bound memory access

AI Score

6.7

Confidence

Low

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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

cxgb4: avoid accessing registers when clearing filters

Hardware register having the server TID base can contain
invalid values when adapter is in bad state (for example,
due to AER fatal error). Reading these invalid values in the
register can lead to out-of-bound memory access. So, fix
by using the saved server TID base when clearing filters.

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/chelsio/cxgb4/cxgb4_filter.c"
    ],
    "versions": [
      {
        "version": "b1a79360ee86",
        "lessThan": "0bf49b3c8d8b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b1a79360ee86",
        "lessThan": "02f03883fdb1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b1a79360ee86",
        "lessThan": "285207a558ab",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b1a79360ee86",
        "lessThan": "88c380df84fb",
        "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/chelsio/cxgb4/cxgb4_filter.c"
    ],
    "versions": [
      {
        "version": "5.2",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.2",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.124",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.42",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.12.9",
        "lessThanOrEqual": "5.12.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.13",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]