CVE-2024-26672

2024-04-0207:15:43

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

web.nvd.nist.gov

linux kernel

vulnerability

amdgpu

mca_funcs

dereferenced

cve-2024-26672

6.6 Medium

AI Score

Confidence

Low

JSON

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

drm/amdgpu: Fix variable ‘mca_funcs’ dereferenced before NULL check in ‘amdgpu_mca_smu_get_mca_entry()’

Fixes the below:

drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c:377 amdgpu_mca_smu_get_mca_entry() warn: variable dereferenced before check ‘mca_funcs’ (see line 368)

357 int amdgpu_mca_smu_get_mca_entry(struct amdgpu_device *adev,
enum amdgpu_mca_error_type type,
358 int idx, struct mca_bank_entry *entry)
359 {
360 const struct amdgpu_mca_smu_funcs *mca_funcs =
adev->mca.mca_funcs;
361 int count;
362
363 switch (type) {
364 case AMDGPU_MCA_ERROR_TYPE_UE:
365 count = mca_funcs->max_ue_count;

mca_funcs is dereferenced here.

366 break;
367 case AMDGPU_MCA_ERROR_TYPE_CE:
368 count = mca_funcs->max_ce_count;

mca_funcs is dereferenced here.

369 break;
370 default:
371 return -EINVAL;
372 }
373
374 if (idx >= count)
375 return -EINVAL;
376
377 if (mca_funcs && mca_funcs->mca_get_mca_entry)
^^^^^^^^^

Checked too late!

CPE configuration

Vulners

linuxlinux_kernelRange6.7.0–6.7.4

linuxlinux_kernelRange6.8.0≥

VendorProductVersionCPE
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::::::::

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c"
    ],
    "versions": [
      {
        "version": "1da177e4c3f4",
        "lessThan": "7b5d58c07024",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "4f32504a2f85",
        "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/gpu/drm/amd/amdgpu/amdgpu_mca.c"
    ],
    "versions": [
      {
        "version": "6.7.4",
        "lessThanOrEqual": "6.7.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]