CVE-2024-38543

2024-06-1914:15:14

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

web.nvd.nist.gov

linux kernel

vulnerability

resolved

src_pfns

dst_pfns

allocation

6.4 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.7%

JSON

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

lib/test_hmm.c: handle src_pfns and dst_pfns allocation failure

The kcalloc() in dmirror_device_evict_chunk() will return null if the
physical memory has run out. As a result, if src_pfns or dst_pfns is
dereferenced, the null pointer dereference bug will happen.

Moreover, the device is going away. If the kcalloc() fails, the pages
mapping a chunk could not be evicted. So add a __GFP_NOFAIL flag in
kcalloc().

Finally, as there is no need to have physically contiguous memory, Switch
kcalloc() to kvcalloc() in order to avoid failing allocations.

Affected configurations

Vulners

Node

linuxlinux_kernelRange5.8–6.1.93

linuxlinux_kernelRange6.2.0–6.6.33

linuxlinux_kernelRange6.7.0–6.8.12

linuxlinux_kernelRange6.9.0–6.9.3

linuxlinux_kernelRange6.10.0–6.10-rc1

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "lib/test_hmm.c"
    ],
    "versions": [
      {
        "version": "b2ef9f5a5cb3",
        "lessThan": "1a21fdeea502",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b2ef9f5a5cb3",
        "lessThan": "65e528a69cb3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b2ef9f5a5cb3",
        "lessThan": "ce47e8ead9a7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b2ef9f5a5cb3",
        "lessThan": "3b20d18f475b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b2ef9f5a5cb3",
        "lessThan": "c2af060d1c18",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "lib/test_hmm.c"
    ],
    "versions": [
      {
        "version": "5.8",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.8",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.93",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.33",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.12",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.3",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]