CVE-2021-47301 igb: Fix use-after-free error during reset

2024-05-2114:35:22

Linux

www.cve.org

linux kernel

igb

use-after-free

reset

vulnerability

memory accesses

igb_poll

skb

igc

6.7 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

10.4%

JSON

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

igb: Fix use-after-free error during reset

Cleans the next descriptor to watch (next_to_watch) when cleaning the
TX ring.

Failure to do so can cause invalid memory accesses. If igb_poll() runs
while the controller is reset this can lead to the driver try to free
a skb that was already freed.

(The crash is harder to reproduce with the igb driver, but the same
potential problem exists as the code is identical to igc)

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/intel/igb/igb_main.c"
    ],
    "versions": [
      {
        "version": "7cc6fd4c60f2",
        "lessThan": "d7367f781e5a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7cc6fd4c60f2",
        "lessThan": "d3ccb18ed5ac",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7cc6fd4c60f2",
        "lessThan": "88e0720133d4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7cc6fd4c60f2",
        "lessThan": "f153664d8e70",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7cc6fd4c60f2",
        "lessThan": "8e24c12f2ff6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7cc6fd4c60f2",
        "lessThan": "7b292608db23",
        "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/intel/igb/igb_main.c"
    ],
    "versions": [
      {
        "version": "4.12",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.12",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.241",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.199",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.136",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.54",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.13.6",
        "lessThanOrEqual": "5.13.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.14",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]