CVE-2023-52531

2024-03-0222:15:48

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

linux

kernel

wifi

iwlwifi

mvm

memory corruption

vulnerability

cve-2023-52531

6.3 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.7%

JSON

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

wifi: iwlwifi: mvm: Fix a memory corruption issue

A few lines above, space is kzalloc()'ed for:
sizeof(struct iwl_nvm_data) +
sizeof(struct ieee80211_channel) +
sizeof(struct ieee80211_rate)

‘mvm->nvm_data’ is a ‘struct iwl_nvm_data’, so it is fine.

At the end of this structure, there is the ‘channels’ flex array.
Each element is of type ‘struct ieee80211_channel’.
So only 1 element is allocated in this array.

When doing:
mvm->nvm_data->bands[0].channels = mvm->nvm_data->channels;
We point at the first element of the ‘channels’ flex array.
So this is fine.

However, when doing:
mvm->nvm_data->bands[0].bitrates =
(void *)((u8 *)mvm->nvm_data->channels + 1);
because of the “(u8 *)” cast, we add only 1 to the address of the beginning
of the flex array.

It is likely that we want point at the ‘struct ieee80211_rate’ allocated
just after.

Remove the spurious casting so that the pointer arithmetic works as
expected.

Affected configurations

Vulners

Node

linuxlinux_kernelRange3.9–5.15.135

linuxlinux_kernelRange5.16.0–6.1.57

linuxlinux_kernelRange6.2.0–6.5.7

linuxlinux_kernelRange6.6.0≥

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/wireless/intel/iwlwifi/mvm/fw.c"
    ],
    "versions": [
      {
        "version": "8ca151b568b6",
        "lessThan": "7c8faa310803",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8ca151b568b6",
        "lessThan": "6b3223449c95",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8ca151b568b6",
        "lessThan": "f06cdd8d4ba5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8ca151b568b6",
        "lessThan": "8ba438ef3cac",
        "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/wireless/intel/iwlwifi/mvm/fw.c"
    ],
    "versions": [
      {
        "version": "3.9",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "3.9",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.135",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.57",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.5.7",
        "lessThanOrEqual": "6.5.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]