CVE-2024-44997 net: ethernet: mtk_wed: fix use-after-free panic in mtk_wed_setup_tc_block_cb()

2024-09-0419:54:42

Linux

www.cve.org

linux kernel

ethernet

use-after-free

EPSS

Percentile

5.1%

JSON

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

net: ethernet: mtk_wed: fix use-after-free panic in mtk_wed_setup_tc_block_cb()

When there are multiple ap interfaces on one band and with WED on,
turning the interface down will cause a kernel panic on MT798X.

Previously, cb_priv was freed in mtk_wed_setup_tc_block() without
marking NULL,and mtk_wed_setup_tc_block_cb() didn’t check the value, too.

Assign NULL after free cb_priv in mtk_wed_setup_tc_block() and check NULL
in mtk_wed_setup_tc_block_cb().

Unable to handle kernel paging request at virtual address 0072460bca32b4f5
Call trace:
mtk_wed_setup_tc_block_cb+0x4/0x38
0xffffffc0794084bc
tcf_block_playback_offloads+0x70/0x1e8
tcf_block_unbind+0x6c/0xc8
…

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/mediatek/mtk_wed.c"
    ],
    "versions": [
      {
        "version": "799684448e3e",
        "lessThan": "326a89321f9d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "799684448e3e",
        "lessThan": "b453a4bbda03",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "799684448e3e",
        "lessThan": "db1b4bedb9b9",
        "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/mediatek/mtk_wed.c"
    ],
    "versions": [
      {
        "version": "6.2",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.2",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.48",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10.7",
        "lessThanOrEqual": "6.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.11",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]