CVE-2021-47137 net: lantiq: fix memory corruption in RX ring

2024-03-2509:07:36

Linux

www.cve.org

linux kernel

vulnerability

memory corruption

rx ring

lantiq

dma

skb

mapping

patch

cve-2021-47137

6.9 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.7%

JSON

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

net: lantiq: fix memory corruption in RX ring

In a situation where memory allocation or dma mapping fails, an
invalid address is programmed into the descriptor. This can lead
to memory corruption. If the memory allocation fails, DMA should
reuse the previous skb and mapping and drop the packet. This patch
also increments rx drop counter.

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/lantiq_xrx200.c"
    ],
    "versions": [
      {
        "version": "fe1a56420cf2",
        "lessThan": "8bb1077448d4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fe1a56420cf2",
        "lessThan": "5ac72351655f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fe1a56420cf2",
        "lessThan": "46dd4abced3c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fe1a56420cf2",
        "lessThan": "c7718ee96dbc",
        "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/lantiq_xrx200.c"
    ],
    "versions": [
      {
        "version": "4.20",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.20",
        "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"
      }
    ]
  }
]