CVE-2023-52776 wifi: ath12k: fix dfs-radar and temperature event locking

2024-05-2115:30:56

Linux

github.com

linux kernel

vulnerability

ath12k

event locking

fix

dfs-radar

temperature

rcu

use-after-free

compile tested

AI Score

Confidence

Low

EPSS

Percentile

15.5%

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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

wifi: ath12k: fix dfs-radar and temperature event locking

The ath12k active pdevs are protected by RCU but the DFS-radar and
temperature event handling code calling ath12k_mac_get_ar_by_pdev_id()
was not marked as a read-side critical section.

Mark the code in question as RCU read-side critical sections to avoid
any potential use-after-free issues.

Note that the temperature event handler looks like a place holder
currently but would still trigger an RCU lockdep splat.

Compile tested only.

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "d889913205cf",
        "lessThan": "774de37c147f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d889913205cf",
        "lessThan": "d7a5f7f76568",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "d889913205cf",
        "lessThan": "69bd216e0493",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/wireless/ath/ath12k/wmi.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.3"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.3",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "6.5.13",
        "versionType": "custom",
        "lessThanOrEqual": "6.5.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.3",
        "versionType": "custom",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.7",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/wireless/ath/ath12k/wmi.c"
    ],
    "defaultStatus": "affected"
  }
]